From 355026dcf7164e9500a8a229483c106380b74b3d Mon Sep 17 00:00:00 2001
From: Julian Cuni <julian.cuni@microservices.al>
Date: Sun, 14 Jun 2026 14:28:52 +0200
Subject: [PATCH] Remove UHPPOTE/ZKTeco; Dingtian is the only access driver
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Neither UHPPOTE nor ZKTeco is used — the Dingtian relay controller was chosen
and verified. Remove their code and re-scope the wiki.

Code:
- delete access-uhppote.ts, uhppoted.d.ts, access.ts (zkteco/esp32-relay stubs),
  and the three uhppote-*.mjs hardware test scripts.
- remove the `uhppoted` npm dependency from @parking/devices and @parking/server.
- unregister uhppote/zkteco/esp32-relay from the driver registry; drop their
  exports. Catalog access drivers = dingtian only. Build green (5/5).
- refresh now-stale example comments (registry/interfaces/setup/api) to use
  current examples; keep the two "UHPPOTE blocker" references that explain why
  the precondition capability exists.

Wiki (kept pages, re-scoped):
- uhppote-controller, zkteco-controller -> rejected/historical with callouts;
  uhppote-vs-esp32 -> historical (detection-vs-prevention lens still useful).
- re-point all "current device" framing (standing-decisions, bom, overview,
  open-questions, device-registry, device-discovery, index) to dingtian-relay.
- transferable concepts (network-isolation, event-log-ingestion, barrier-not-a-
  door, threat-model) untouched. Raw source immutable. Links lint clean.
---
 apps/server/package.json                      |   3 +-
 apps/server/scripts/uhppote-common.mjs        |  72 -----
 apps/server/scripts/uhppote-listen.mjs        | 100 -------
 apps/server/scripts/uhppote-relay.mjs         |  44 ---
 apps/server/src/routes/setup.ts               |   4 +-
 apps/web/src/api.ts                           |   2 +-
 packages/devices/package.json                 |   3 +-
 .../devices/src/drivers/access-uhppote.ts     | 263 ------------------
 packages/devices/src/drivers/access.ts        |  49 ----
 packages/devices/src/drivers/index.ts         |   8 -
 packages/devices/src/drivers/uhppoted.d.ts    |  83 ------
 packages/devices/src/index.ts                 |   3 -
 packages/devices/src/interfaces.ts            |   4 +-
 packages/devices/src/registry.ts              |  13 +-
 pnpm-lock.yaml                                |  19 --
 wiki/concepts/device-discovery.md             |  18 +-
 wiki/concepts/device-registry.md              |   3 +-
 wiki/concepts/uhppote-vs-esp32.md             |  14 +-
 wiki/decisions/open-questions.md              |   2 +-
 wiki/decisions/standing-decisions.md          |  10 +-
 wiki/entities/bom.md                          |   2 +-
 wiki/entities/uhppote-controller.md           |  44 +--
 wiki/entities/zkteco-controller.md            |  18 +-
 wiki/index.md                                 |   8 +-
 wiki/log.md                                   |  13 +
 wiki/overview.md                              |  15 +-
 26 files changed, 106 insertions(+), 711 deletions(-)
 delete mode 100644 apps/server/scripts/uhppote-common.mjs
 delete mode 100644 apps/server/scripts/uhppote-listen.mjs
 delete mode 100644 apps/server/scripts/uhppote-relay.mjs
 delete mode 100644 packages/devices/src/drivers/access-uhppote.ts
 delete mode 100644 packages/devices/src/drivers/access.ts
 delete mode 100644 packages/devices/src/drivers/uhppoted.d.ts

diff --git a/apps/server/package.json b/apps/server/package.json
index ab53ee3..434f3cd 100644
--- a/apps/server/package.json
+++ b/apps/server/package.json
@@ -21,8 +21,7 @@
     "@parking/shared": "workspace:*",
     "bcrypt": "6.0.0",
     "fastify": "5.8.5",
-    "fastify-plugin": "6.0.0",
-    "uhppoted": "0.9.0"
+    "fastify-plugin": "6.0.0"
   },
   "devDependencies": {
     "@types/bcrypt": "6.0.0",
diff --git a/apps/server/scripts/uhppote-common.mjs b/apps/server/scripts/uhppote-common.mjs
deleted file mode 100644
index ff8b75d..0000000
--- a/apps/server/scripts/uhppote-common.mjs
+++ /dev/null
@@ -1,72 +0,0 @@
-// Shared helpers for the UHPPOTE hardware test scripts.
-// Run directly against the device (independent of the HTTP server).
-//
-//   node apps/server/scripts/uhppote-listen.mjs
-//   node apps/server/scripts/uhppote-relay.mjs
-//
-// Env overrides:
-//   UHPPOTE_SERIAL   controller serial   (default 225088491)
-//   UHPPOTE_HOST     controller IP       (default 10.0.10.3)
-//   UHPPOTE_BCAST    Config broadcast    (default derived from HOST subnet)
-//   HOST_IP          this host's IP the controller pushes events to
-//                    (default: auto-detected interface on the controller's subnet)
-
-import { networkInterfaces } from "node:os";
-import { createRequire } from "node:module";
-
-const require = createRequire(import.meta.url);
-const uhppoted = require("uhppoted");
-
-export const SERIAL = Number(process.env.UHPPOTE_SERIAL ?? 225088491);
-export const HOST = process.env.UHPPOTE_HOST ?? "10.0.10.3";
-
-/** Subnet-directed broadcast for the interface that owns `ip`. */
-function broadcastForHost(ip) {
-  const o = ip.split(".").map(Number);
-  for (const ifaces of Object.values(networkInterfaces())) {
-    for (const i of ifaces ?? []) {
-      if (i.family !== "IPv4" || i.internal) continue;
-      const a = i.address.split(".").map(Number);
-      const m = i.netmask.split(".").map(Number);
-      if (o.every((x, k) => (x & m[k]) === (a[k] & m[k]))) {
-        return a.map((x, k) => (x & m[k]) | (~m[k] & 0xff)).join(".");
-      }
-    }
-  }
-  return "255.255.255.255";
-}
-
-/** This host's own IP on the controller's subnet (where it should push events). */
-export function hostIpOnControllerSubnet(ip = HOST) {
-  if (process.env.HOST_IP) return process.env.HOST_IP;
-  const o = ip.split(".").map(Number);
-  for (const ifaces of Object.values(networkInterfaces())) {
-    for (const i of ifaces ?? []) {
-      if (i.family !== "IPv4" || i.internal) continue;
-      const a = i.address.split(".").map(Number);
-      const m = i.netmask.split(".").map(Number);
-      if (o.every((x, k) => (x & m[k]) === (a[k] & m[k]))) return i.address;
-    }
-  }
-  return null;
-}
-
-export const BCAST = process.env.UHPPOTE_BCAST ?? broadcastForHost(HOST);
-
-export function makeCtx(timeoutMs = 5000) {
-  return {
-    config: new uhppoted.Config(
-      "parking",
-      "0.0.0.0",
-      `${BCAST}:60000`,
-      "0.0.0.0:60001",
-      timeoutMs,
-      [],
-      false,
-    ),
-    locale: "en-US",
-  };
-}
-
-export const controller = { id: SERIAL, address: HOST, protocol: "udp" };
-export { uhppoted };
diff --git a/apps/server/scripts/uhppote-listen.mjs b/apps/server/scripts/uhppote-listen.mjs
deleted file mode 100644
index bd127f1..0000000
--- a/apps/server/scripts/uhppote-listen.mjs
+++ /dev/null
@@ -1,100 +0,0 @@
-// Live button/event listener for the UHPPOTE controller.
-//
-// Points the controller's event listener at THIS host, then prints each pushed
-// event in real time. Press the door buttons on the controller and watch them
-// appear. Ctrl-C to stop.
-//
-//   node apps/server/scripts/uhppote-listen.mjs
-
-import {
-  controller,
-  hostIpOnControllerSubnet,
-  makeCtx,
-  uhppoted,
-} from "./uhppote-common.mjs";
-
-const ctx = makeCtx();
-
-const hostIp = hostIpOnControllerSubnet();
-if (!hostIp) {
-  console.error("Could not determine this host's IP on the controller's subnet.");
-  console.error("Set HOST_IP=<your-ip-on-the-controller-LAN> and retry.");
-  process.exit(1);
-}
-
-console.log(`controller : ${controller.id} @ ${controller.address}`);
-console.log(`this host   : ${hostIp} (events will be pushed here on :60001)`);
-
-// 0) Remember the controller's current listener so we can restore it on exit
-//    (it was pointing somewhere else, e.g. 10.0.10.241).
-let prevListener = null;
-try {
-  prevListener = await uhppoted.getListener(ctx, controller);
-  console.log(`prior listener: ${prevListener.address}:${prevListener.port} (will restore on exit)`);
-} catch (e) {
-  console.warn("getListener (non-fatal):", e.code ?? e.message);
-}
-
-// 1) Tell the controller to push events to us.
-try {
-  const r = await uhppoted.setListener(ctx, controller, hostIp, 60001);
-  console.log("setListener:", JSON.stringify(r));
-} catch (e) {
-  console.error("setListener failed:", e.code ?? e.message);
-  process.exit(1);
-}
-
-// 2) (Best-effort) ensure door open/close + button events are recorded.
-try {
-  await uhppoted.recordSpecialEvents(ctx, controller, true);
-  console.log("recordSpecialEvents: enabled");
-} catch (e) {
-  console.warn("recordSpecialEvents (non-fatal):", e.code ?? e.message);
-}
-
-console.log("\n── listening — press the door buttons on the controller ──\n");
-
-function describe(ev) {
-  const e = ev?.state?.event ?? ev?.event;
-  const buttons = ev?.state?.buttons;
-  const doors = ev?.state?.doors;
-  const parts = [];
-  if (e) {
-    parts.push(
-      `event#${e.index} type=${e.type?.event ?? e.type?.code} door=${e.door} granted=${e.granted} reason="${e.reason?.reason ?? e.reason?.code}" @${e.timestamp}`,
-    );
-  }
-  if (buttons) {
-    const pressed = Object.entries(buttons).filter(([, v]) => v).map(([k]) => k);
-    parts.push(`buttons=[${pressed.join(",") || "none"}]`);
-  }
-  if (doors) {
-    const open = Object.entries(doors).filter(([, v]) => v).map(([k]) => k);
-    parts.push(`doorsOpen=[${open.join(",") || "none"}]`);
-  }
-  return parts.join("  ");
-}
-
-uhppoted.listen(
-  ctx,
-  (event) => {
-    console.log(`[${new Date().toISOString()}] ${describe(event)}`);
-  },
-  (err) => {
-    console.error("listen error:", err?.message ?? err);
-  },
-);
-
-process.on("SIGINT", async () => {
-  // Restore the controller's previous listener so we don't hijack it.
-  if (prevListener && prevListener.address && prevListener.address !== "0.0.0.0") {
-    try {
-      await uhppoted.setListener(ctx, controller, prevListener.address, prevListener.port);
-      console.log(`\nrestored listener -> ${prevListener.address}:${prevListener.port}`);
-    } catch (e) {
-      console.warn("\ncould not restore listener:", e.code ?? e.message);
-    }
-  }
-  console.log("stopped.");
-  process.exit(0);
-});
diff --git a/apps/server/scripts/uhppote-relay.mjs b/apps/server/scripts/uhppote-relay.mjs
deleted file mode 100644
index db0f5ca..0000000
--- a/apps/server/scripts/uhppote-relay.mjs
+++ /dev/null
@@ -1,44 +0,0 @@
-// Guarded relay (door-open) test for the UHPPOTE controller.
-//
-// Prompts before firing each relay so a door only opens when you're ready and
-// watching. This is a 2-door controller, so it tests doors 1 and 2 by default.
-//
-//   node apps/server/scripts/uhppote-relay.mjs           # doors 1,2 (prompted)
-//   node apps/server/scripts/uhppote-relay.mjs 1          # only door 1
-//   YES=1 node apps/server/scripts/uhppote-relay.mjs      # no prompts (fires!)
-//
-// SAFETY: openDoor only expresses INTENT to open. The controller / barrier
-// operator owns the close timing and anti-crush — we never time a close.
-
-import { createInterface } from "node:readline/promises";
-import { stdin, stdout } from "node:process";
-import { controller, makeCtx, uhppoted } from "./uhppote-common.mjs";
-
-const ctx = makeCtx();
-const doors = process.argv.slice(2).map(Number).filter((n) => n >= 1 && n <= 4);
-const targets = doors.length ? doors : [1, 2];
-const autoYes = process.env.YES === "1";
-
-console.log(`controller : ${controller.id} @ ${controller.address}`);
-console.log(`testing doors: ${targets.join(", ")}${autoYes ? " (auto, no prompts)" : ""}\n`);
-
-const rl = autoYes ? null : createInterface({ input: stdin, output: stdout });
-
-for (const door of targets) {
-  if (rl) {
-    const ans = await rl.question(`Open door ${door}? [y/N] `);
-    if (ans.trim().toLowerCase() !== "y") {
-      console.log(`  skipped door ${door}`);
-      continue;
-    }
-  }
-  try {
-    const res = await uhppoted.openDoor(ctx, controller, door);
-    console.log(`  door ${door}: openDoor -> ${JSON.stringify(res)}`);
-  } catch (e) {
-    console.log(`  door ${door}: ERROR ${e.code ?? e.message}`);
-  }
-}
-
-rl?.close();
-console.log("\ndone.");
diff --git a/apps/server/src/routes/setup.ts b/apps/server/src/routes/setup.ts
index 16db876..d5cb18b 100644
--- a/apps/server/src/routes/setup.ts
+++ b/apps/server/src/routes/setup.ts
@@ -28,14 +28,14 @@ export async function setupRoutes(app: FastifyInstance, db: Db): Promise<void> {
   const adminGuard = requireRole("admin");
 
   // Catalog of selectable drivers per category (no secrets — schema only).
-  // `discoverable` flags drivers that can scan the LAN (e.g. UHPPOTE).
+  // `discoverable` flags drivers that can scan the LAN.
   app.get("/api/setup/catalog", async () => {
     const catalog = registry.catalog();
     const discoverable = registry.list().filter(isDiscoverable).map((d) => d.id);
     return { ...catalog, discoverable };
   });
 
-  // Scan the LAN for devices a driver can discover (UHPPOTE UDP broadcast, etc).
+  // Scan the LAN for devices a driver can discover (UDP broadcast, etc).
   // Each found device is health-checked so the admin sees reachability before
   // assigning. Admin-only. See wiki/concepts/device-discovery.md.
   app.get<{ Params: { driverId: string } }>(
diff --git a/apps/web/src/api.ts b/apps/web/src/api.ts
index 68c47d6..afce44f 100644
--- a/apps/web/src/api.ts
+++ b/apps/web/src/api.ts
@@ -110,7 +110,7 @@ export interface DiscoveredDevice {
   health: { status: string; detail?: string };
 }
 
-/** Scan the LAN for devices a driver can discover (e.g. UHPPOTE). Admin-only. */
+/** Scan the LAN for devices a driver can discover. Admin-only. */
 export async function discoverDevices(driverId: string): Promise<DiscoveredDevice[]> {
   const body = await apiFetch<{ devices: DiscoveredDevice[] }>(
     `/api/setup/discover/${driverId}`,
diff --git a/packages/devices/package.json b/packages/devices/package.json
index 45c548a..1e09792 100644
--- a/packages/devices/package.json
+++ b/packages/devices/package.json
@@ -18,8 +18,7 @@
     "lint": "tsc --noEmit"
   },
   "dependencies": {
-    "@parking/shared": "workspace:*",
-    "uhppoted": "0.9.0"
+    "@parking/shared": "workspace:*"
   },
   "devDependencies": {
     "@types/node": "25.9.3",
diff --git a/packages/devices/src/drivers/access-uhppote.ts b/packages/devices/src/drivers/access-uhppote.ts
deleted file mode 100644
index e19018d..0000000
--- a/packages/devices/src/drivers/access-uhppote.ts
+++ /dev/null
@@ -1,263 +0,0 @@
-import { networkInterfaces } from "node:os";
-import uhppoted, { type Controller, type Ctx } from "uhppoted";
-import type { AccessControlDevice, DeviceHealth } from "../interfaces.js";
-import type {
-  AccessDriver,
-  DeviceConfig,
-  DiscoveredDevice,
-} from "../registry.js";
-import { hostField, stubLog } from "./common.js";
-
-// `uhppoted` is CommonJS — import the default and destructure (named ESM imports
-// don't resolve off a CJS module under NodeNext).
-const { Config, getDevices, getStatus, openDoor } = uhppoted;
-
-// Every uhppoted call binds a UDP listener on :60001 for replies. Concurrent
-// calls collide on that port (EACCES / dropped replies → spurious timeouts), so
-// we serialize ALL controller I/O through one queue. UDP request/response is
-// fast, so serial throughput is fine for a parking host. This is why parallel
-// discovery + health checks were timing out.
-let chain: Promise<unknown> = Promise.resolve();
-function serialize<T>(fn: () => Promise<T>): Promise<T> {
-  const run = chain.then(fn, fn);
-  // keep the chain alive regardless of this call's outcome
-  chain = run.then(
-    () => undefined,
-    () => undefined,
-  );
-  return run;
-}
-
-/**
- * Compute subnet-directed broadcast addresses (e.g. 10.0.10.255) for every
- * non-internal IPv4 interface.
- *
- * Why this matters: the uhppoted lib only enables SO_BROADCAST when the target
- * matches a *subnet-directed* broadcast of a local interface — it does NOT
- * recognise the global 255.255.255.255, so broadcasting there fails with EACCES.
- * We must broadcast to the per-interface address (e.g. 10.0.10.255) instead.
- */
-interface Iface {
-  network: number[]; // ip & mask, per octet
-  mask: number[];
-  broadcast: string;
-}
-
-function localIfaces(): Iface[] {
-  const out: Iface[] = [];
-  for (const ifaces of Object.values(networkInterfaces())) {
-    for (const i of ifaces ?? []) {
-      if (i.family !== "IPv4" || i.internal) continue;
-      const ip = i.address.split(".").map(Number);
-      const mask = i.netmask.split(".").map(Number);
-      if (ip.length !== 4 || mask.length !== 4) continue;
-      out.push({
-        network: ip.map((o, k) => o & mask[k]!),
-        mask,
-        broadcast: ip.map((o, k) => (o & mask[k]!) | (~mask[k]! & 0xff)).join("."),
-      });
-    }
-  }
-  return out;
-}
-
-function subnetBroadcastAddrs(): string[] {
-  return localIfaces().map((i) => i.broadcast);
-}
-
-/** Broadcast target for discovery: explicit override, else first subnet bcast. */
-function discoveryBroadcast(): string {
-  return (
-    process.env.UHPPOTE_BROADCAST ?? subnetBroadcastAddrs()[0] ?? "255.255.255.255"
-  );
-}
-
-/**
- * The subnet-directed broadcast for the interface that `host` belongs to. The
- * uhppoted Config's broadcast address governs reply routing even for unicast
- * ops, so it must match the TARGET's subnet (not just the first interface) or
- * the reply is missed → timeout.
- */
-function broadcastForHost(host: string): string {
-  const ip = host.split(".").map(Number);
-  if (ip.length === 4) {
-    for (const i of localIfaces()) {
-      if (ip.every((o, k) => (o & i.mask[k]!) === i.network[k])) return i.broadcast;
-    }
-  }
-  return discoveryBroadcast();
-}
-
-// Real UHPPOTE access-control driver, backed by the official `uhppoted` lib.
-// Implements AccessControlDevice (intent-only relay — "a barrier is not a door";
-// the controller/barrier operator owns physical safety). See
-// wiki/entities/uhppote-controller.md and wiki/concepts/barrier-not-a-door.md.
-//
-// SECURITY: the UHPPOTE protocol is unauthenticated UDP (port 60000). This driver
-// assumes the controller sits on an isolated VLAN reachable only by the host.
-// See wiki/concepts/uhppote-udp-protocol.md and network-isolation.md.
-
-/**
- * uhppoted context broadcasting to a specific address on :60000, listening for
- * replies on :60001.
- */
-function buildCtxFor(broadcast: string, timeoutMs = 5000): Ctx {
-  return {
-    config: new Config(
-      "parking",
-      "0.0.0.0",
-      `${broadcast}:60000`,
-      "0.0.0.0:60001",
-      timeoutMs,
-      [],
-      false,
-    ),
-    locale: "en-US",
-  };
-}
-
-/** Default context for non-discovery ops (status/open use a unicast host). */
-function buildCtx(timeoutMs = 5000): Ctx {
-  return buildCtxFor(discoveryBroadcast(), timeoutMs);
-}
-
-/**
- * Broadcast targets to try for discovery. An explicit UHPPOTE_BROADCAST wins;
- * otherwise every local subnet-directed broadcast (a host may have several
- * interfaces — LAN, VPN, docker — and the controller is on only one).
- */
-function discoveryBroadcasts(): string[] {
-  const override = process.env.UHPPOTE_BROADCAST;
-  if (override) return [override];
-  const addrs = subnetBroadcastAddrs();
-  return addrs.length > 0 ? addrs : ["255.255.255.255"];
-}
-
-class UhppoteAccessControl implements AccessControlDevice {
-  readonly driverId = "uhppote";
-  readonly #controller: Controller;
-  readonly #ctx: Ctx;
-
-  constructor(config: DeviceConfig) {
-    const serial = Number(config.serial);
-    const address = config.host ? String(config.host) : undefined;
-    const protocol = config.protocol === "tcp" ? "tcp" : "udp";
-
-    // Addressable descriptor when a host is given; otherwise rely on UDP
-    // broadcast discovery by serial.
-    this.#controller = address ? { id: serial, address, protocol } : serial;
-
-    // The Config broadcast must match the target host's subnet (it governs
-    // reply routing even for unicast), else replies are missed → timeout.
-    const timeoutMs = config.timeoutMs ? Number(config.timeoutMs) : 5000;
-    this.#ctx = address
-      ? buildCtxFor(broadcastForHost(address), timeoutMs)
-      : buildCtx(timeoutMs);
-  }
-
-  async connect(): Promise<void> {
-    // No persistent socket to open (request/response over UDP); verify reachability.
-    await this.healthCheck();
-  }
-
-  async disconnect(): Promise<void> {
-    stubLog(this.driverId, "disconnect (stateless udp — nothing to close)");
-  }
-
-  async healthCheck(): Promise<DeviceHealth> {
-    try {
-      await serialize(() => getStatus(this.#ctx, this.#controller));
-      return { status: "ready" };
-    } catch (err) {
-      return { status: "offline", detail: (err as Error).message };
-    }
-  }
-
-  /**
-   * Express intent to open a door (1–4). NEVER timed/forced closed against a
-   * vehicle — auto-close/anti-crush is the barrier operator's firmware.
-   */
-  async pulseOpen(doorId: number): Promise<void> {
-    const res = await serialize(() =>
-      openDoor(this.#ctx, this.#controller, doorId),
-    );
-    if (!res.opened) {
-      throw new Error(`uhppote: door ${doorId} not opened (deviceId ${res.deviceId})`);
-    }
-  }
-
-  async getDoorStatus(): Promise<"open" | "closed"> {
-    // The UHPPOTE status payload carries per-door state; without a confirmed
-    // wiring of door sensors we report the safe default until the real status
-    // mapping is added. (Status is fetched to prove reachability.)
-    await serialize(() => getStatus(this.#ctx, this.#controller));
-    return "closed";
-  }
-}
-
-export const uhppoteDriver: AccessDriver & {
-  discover(): Promise<DiscoveredDevice[]>;
-} = {
-  id: "uhppote",
-  category: "access",
-  label: "UHPPOTE controller",
-  description:
-    "UHPPOTE Wiegand 26/34 network controller via the official uhppoted lib. Unauthenticated UDP — isolate the VLAN.",
-  transports: ["udp", "tcp"],
-  // UDP broadcast discovery (get-devices): every controller on the LAN answers
-  // with its serial, IP, and firmware. Broadcasts on every local subnet (the
-  // controller is on only one interface) and dedupes by serial.
-  // See wiki/concepts/device-discovery.md.
-  async discover(): Promise<DiscoveredDevice[]> {
-    const bySerial = new Map<number, DiscoveredDevice>();
-    // Serial, not parallel: each getDevices binds :60001, so concurrent scans
-    // across interfaces collide (EACCES / dropped replies).
-    for (const bcast of discoveryBroadcasts()) {
-      let found;
-      try {
-        found = await serialize(() => getDevices(buildCtxFor(bcast, 3000)));
-      } catch {
-        continue; // a dead interface shouldn't fail the whole scan
-      }
-      for (const d of found) {
-        bySerial.set(d.device.serialNumber, {
-          id: String(d.device.serialNumber),
-          label: `UHPPOTE ${d.device.serialNumber} @ ${d.device.address}`,
-          config: { serial: d.device.serialNumber, host: d.device.address, protocol: "udp" },
-          info: {
-            address: d.device.address,
-            netmask: d.device.netmask,
-            gateway: d.device.gateway,
-            MAC: d.device.MAC,
-            firmware: d.device.version,
-          },
-        });
-      }
-    }
-    return [...bySerial.values()];
-  },
-  configFields: [
-    {
-      key: "serial",
-      label: "Controller serial number",
-      type: "number",
-      required: true,
-      help: "Printed on the controller (e.g. 405419896).",
-    },
-    { ...hostField, required: false, help: "Optional: target a specific IP instead of UDP broadcast. Isolated VLAN only." },
-    {
-      key: "protocol",
-      label: "Protocol",
-      type: "select",
-      required: false,
-      default: "udp",
-      options: [
-        { value: "udp", label: "UDP (default)" },
-        { value: "tcp", label: "TCP (newer firmware)" },
-      ],
-    },
-    { key: "doors", label: "Door count", type: "number", required: true, default: 4 },
-    { key: "timeoutMs", label: "Timeout (ms)", type: "number", required: false, default: 5000 },
-  ],
-  create: (c) => new UhppoteAccessControl(c),
-};
diff --git a/packages/devices/src/drivers/access.ts b/packages/devices/src/drivers/access.ts
deleted file mode 100644
index 087bd31..0000000
--- a/packages/devices/src/drivers/access.ts
+++ /dev/null
@@ -1,49 +0,0 @@
-import type { AccessControlDevice, DeviceHealth } from "../interfaces.js";
-import type { AccessDriver, DeviceConfig } from "../registry.js";
-import { hostField, portField, stubLog } from "./common.js";
-
-// Access-control drivers. Each implements AccessControlDevice (intent-only relay
-// — "a barrier is not a door"). STUBS: connect/log only, no real protocol yet.
-
-class StubAccessControl implements AccessControlDevice {
-  constructor(
-    readonly driverId: string,
-    protected readonly config: DeviceConfig,
-  ) {}
-  async connect(): Promise<void> {
-    stubLog(this.driverId, `connect ${this.config.host}:${this.config.port}`);
-  }
-  async disconnect(): Promise<void> {
-    stubLog(this.driverId, "disconnect");
-  }
-  async healthCheck(): Promise<DeviceHealth> {
-    return { status: "ready", detail: "stub" };
-  }
-  async pulseOpen(doorId: number): Promise<void> {
-    // Intent only — never times/forces a close against a vehicle.
-    stubLog(this.driverId, `pulseOpen door=${doorId}`);
-  }
-  async getDoorStatus(): Promise<"open" | "closed"> {
-    return "closed";
-  }
-}
-
-export const zktecoDriver: AccessDriver = {
-  id: "zkteco",
-  category: "access",
-  label: "ZKTeco controller",
-  description: "ZKTeco network access controller (TCP/IP). Reader + relay.",
-  transports: ["tcp-ip"],
-  configFields: [hostField, portField(4370), { key: "doors", label: "Door count", type: "number", required: true, default: 4 }],
-  create: (c) => new StubAccessControl("zkteco", c),
-};
-
-export const esp32RelayDriver: AccessDriver = {
-  id: "esp32-relay",
-  category: "access",
-  label: "ESP32 relay controller",
-  description: "Simple ESP32-based relay controller over the network.",
-  transports: ["tcp-ip"],
-  configFields: [hostField, portField(80), { key: "doors", label: "Relay channels", type: "number", required: true, default: 1 }],
-  create: (c) => new StubAccessControl("esp32-relay", c),
-};
diff --git a/packages/devices/src/drivers/index.ts b/packages/devices/src/drivers/index.ts
index 3ba33d8..db13de8 100644
--- a/packages/devices/src/drivers/index.ts
+++ b/packages/devices/src/drivers/index.ts
@@ -2,9 +2,7 @@
 // module wires the catalog. Add a new device by registering it here.
 
 import { registry } from "../registry.js";
-import { esp32RelayDriver, zktecoDriver } from "./access.js";
 import { dingtianDriver } from "./access-dingtian.js";
-import { uhppoteDriver } from "./access-uhppote.js";
 import { dahuaDriver, hikvisionDriver } from "./camera.js";
 import { tcpipReaderDriver, wiegandReaderDriver } from "./reader.js";
 
@@ -14,10 +12,7 @@ let registered = false;
 export function registerBuiltinDrivers(): void {
   if (registered) return;
   registered = true;
-  registry.register(uhppoteDriver);
   registry.register(dingtianDriver);
-  registry.register(zktecoDriver);
-  registry.register(esp32RelayDriver);
   registry.register(wiegandReaderDriver);
   registry.register(tcpipReaderDriver);
   registry.register(hikvisionDriver);
@@ -25,10 +20,7 @@ export function registerBuiltinDrivers(): void {
 }
 
 export {
-  uhppoteDriver,
   dingtianDriver,
-  zktecoDriver,
-  esp32RelayDriver,
   wiegandReaderDriver,
   tcpipReaderDriver,
   hikvisionDriver,
diff --git a/packages/devices/src/drivers/uhppoted.d.ts b/packages/devices/src/drivers/uhppoted.d.ts
deleted file mode 100644
index 4b29145..0000000
--- a/packages/devices/src/drivers/uhppoted.d.ts
+++ /dev/null
@@ -1,83 +0,0 @@
-// Minimal ambient types for the `uhppoted` CommonJS module (no bundled types).
-// Only the surface we use; extend as we adopt more of the API.
-// Upstream: https://github.com/uhppoted/uhppoted-lib-nodejs
-declare module "uhppoted" {
-  export class Config {
-    constructor(
-      name?: string,
-      bindAddr?: string,
-      broadcastAddr?: string,
-      listenAddr?: string,
-      timeout?: number,
-      controllers?: unknown[],
-      debug?: boolean,
-    );
-  }
-
-  /** Either a bare controller serial, or an addressable descriptor. */
-  export type Controller =
-    | number
-    | { id: number; address?: string; protocol?: "udp" | "tcp" };
-
-  export interface Ctx {
-    config: Config;
-    locale?: string;
-  }
-
-  export interface DiscoveredController {
-    deviceId: number;
-    device: {
-      serialNumber: number;
-      address: string;
-      netmask: string;
-      gateway: string;
-      MAC: string;
-      version: string;
-      date: string;
-    };
-  }
-
-  /** UDP broadcast discovery — returns every controller answering on the LAN. */
-  export function getDevices(ctx: Ctx): Promise<DiscoveredController[]>;
-
-  export function openDoor(
-    ctx: Ctx,
-    controller: Controller,
-    door: number,
-  ): Promise<{ deviceId: number; opened: boolean }>;
-
-  export function getStatus(
-    ctx: Ctx,
-    controller: Controller,
-  ): Promise<Record<string, unknown>>;
-
-  export function getEvent(
-    ctx: Ctx,
-    controller: Controller,
-    index: number,
-  ): Promise<Record<string, unknown>>;
-
-  export function getEventIndex(
-    ctx: Ctx,
-    controller: Controller,
-  ): Promise<{ deviceId: number; index: number }>;
-
-  export function setListener(
-    ctx: Ctx,
-    controller: Controller,
-    address: string,
-    port: number,
-  ): Promise<unknown>;
-
-  // CommonJS default export (module.exports = { ... }). Destructure from this.
-  const uhppoted: {
-    Config: typeof Config;
-    getDevices: typeof getDevices;
-    openDoor: typeof openDoor;
-    getStatus: typeof getStatus;
-    getEvent: typeof getEvent;
-    getEventIndex: typeof getEventIndex;
-    setListener: typeof setListener;
-  };
-  export default uhppoted;
-}
diff --git a/packages/devices/src/index.ts b/packages/devices/src/index.ts
index a905561..9a448b4 100644
--- a/packages/devices/src/index.ts
+++ b/packages/devices/src/index.ts
@@ -10,10 +10,7 @@ export { setDeviceLogSink, type DeviceLogSink } from "./drivers/common.js";
 // hardware test scripts and any direct/programmatic device access).
 export {
   registerBuiltinDrivers,
-  uhppoteDriver,
   dingtianDriver,
-  zktecoDriver,
-  esp32RelayDriver,
   wiegandReaderDriver,
   tcpipReaderDriver,
   hikvisionDriver,
diff --git a/packages/devices/src/interfaces.ts b/packages/devices/src/interfaces.ts
index 363eb2b..6c141af 100644
--- a/packages/devices/src/interfaces.ts
+++ b/packages/devices/src/interfaces.ts
@@ -14,7 +14,7 @@ export type DeviceCategory = "access" | "reader" | "camera" | "printer";
 
 /** Lifecycle shared by every device adapter. */
 export interface Device {
-  /** Stable id of the driver that produced this instance (e.g. "zkteco"). */
+  /** Stable id of the driver that produced this instance (e.g. "dingtian"). */
   readonly driverId: string;
   connect(): Promise<void>;
   disconnect(): Promise<void>;
@@ -28,7 +28,7 @@ export interface DeviceHealth {
 }
 
 // --- Access control (barrier relay) --------------------------------------
-// ZKTeco, an ESP32 relay controller, UHPPOTE, etc. all implement this.
+// The Dingtian relay board (and any future relay controller) implements this.
 export interface AccessControlDevice extends Device {
   /** Express intent to open. NEVER timed/forced closed against a vehicle. */
   pulseOpen(doorId: number): Promise<void>;
diff --git a/packages/devices/src/registry.ts b/packages/devices/src/registry.ts
index 9cf22dc..5bb6c9f 100644
--- a/packages/devices/src/registry.ts
+++ b/packages/devices/src/registry.ts
@@ -35,9 +35,9 @@ export type DeviceConfig = Record<string, string | number | boolean>;
  * fields the admin must supply, and a factory that builds a live adapter.
  */
 export interface DeviceDriver<T extends Device = Device> {
-  readonly id: string; // stable, e.g. "zkteco", "esp32-relay", "hikvision"
+  readonly id: string; // stable, e.g. "dingtian", "hikvision"
   readonly category: DeviceCategory;
-  readonly label: string; // human name for the picker, e.g. "ZKTeco controller"
+  readonly label: string; // human name for the picker, e.g. "Dingtian relay controller"
   readonly description: string;
   /** Transports/notes surfaced in the UI, e.g. ["tcp-ip"], ["wiegand"]. */
   readonly transports: readonly string[];
@@ -53,7 +53,7 @@ export type PrinterDriver = DeviceDriver<PrinterDevice>;
 
 /** A device found on the LAN by a driver's discovery scan. */
 export interface DiscoveredDevice {
-  /** Identifier to pre-fill (e.g. UHPPOTE serial number). */
+  /** Identifier to pre-fill (e.g. a serial number). */
   readonly id: string;
   readonly label: string;
   /** Config values to auto-fill into the setup form (host, serial, …). */
@@ -63,9 +63,10 @@ export interface DiscoveredDevice {
 }
 
 /**
- * Optional capability: a driver that can find devices on the LAN. UHPPOTE
- * implements this via the protocol's UDP broadcast discovery (get-devices);
- * cameras (ONVIF) and others may add it later. See wiki/concepts/device-discovery.md.
+ * Optional capability: a driver that can find devices on the LAN (e.g. UDP
+ * broadcast discovery). No bundled driver implements this yet — the Dingtian
+ * board uses a fixed IP; cameras (ONVIF) or other UDP-discoverable devices may
+ * add it later. See wiki/concepts/device-discovery.md.
  */
 export interface DiscoverableDriver {
   discover(): Promise<DiscoveredDevice[]>;
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index edbe384..4507bc3 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -50,9 +50,6 @@ importers:
       fastify-plugin:
         specifier: 6.0.0
         version: 6.0.0
-      uhppoted:
-        specifier: 0.9.0
-        version: 0.9.0
     devDependencies:
       '@types/bcrypt':
         specifier: 6.0.0
@@ -122,9 +119,6 @@ importers:
       '@parking/shared':
         specifier: workspace:*
         version: link:../shared
-      uhppoted:
-        specifier: 0.9.0
-        version: 0.9.0
     devDependencies:
       '@types/node':
         specifier: 25.9.3
@@ -1262,9 +1256,6 @@ packages:
   once@1.4.0:
     resolution: {integrity: sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==}
 
-  os@0.1.2:
-    resolution: {integrity: sha512-ZoXJkvAnljwvc56MbvhtKVWmSkzV712k42Is2mA0+0KTSRakq5XXuXpjZjgAt9ctzl51ojhQWakQQpmOvXWfjQ==}
-
   path-scurry@2.0.2:
     resolution: {integrity: sha512-3O/iVVsJAPsOnpwWIeD+d6z/7PmqApyQePUtCndjatj/9I5LylHvt5qluFaBT3I5h3r1ejfR056c+FCv+NnNXg==}
     engines: {node: 18 || 20 || >=22}
@@ -1467,10 +1458,6 @@ packages:
     engines: {node: '>=14.17'}
     hasBin: true
 
-  uhppoted@0.9.0:
-    resolution: {integrity: sha512-7VDPNg4x31TETgMD3xp9NwVr+NvmZJ6CO8gTpyuRrdHu/UBGXw9/9kq8yiB0vR4opaUQPdvR8Gj373Ac/QWPwQ==}
-    engines: {node: '>=14.18.3'}
-
   undici-types@7.24.6:
     resolution: {integrity: sha512-WRNW+sJgj5OBN4/0JpHFqtqzhpbnV0GuB+OozA9gCL7a993SmU+1JBZCzLNxYsbMfIeDL+lTsphD5jN5N+n0zg==}
 
@@ -2357,8 +2344,6 @@ snapshots:
     dependencies:
       wrappy: 1.0.2
 
-  os@0.1.2: {}
-
   path-scurry@2.0.2:
     dependencies:
       lru-cache: 11.5.1
@@ -2586,10 +2571,6 @@ snapshots:
 
   typescript@6.0.3: {}
 
-  uhppoted@0.9.0:
-    dependencies:
-      os: 0.1.2
-
   undici-types@7.24.6: {}
 
   util-deprecate@1.0.2: {}
diff --git a/wiki/concepts/device-discovery.md b/wiki/concepts/device-discovery.md
index 5c9c6fb..96e6f91 100644
--- a/wiki/concepts/device-discovery.md
+++ b/wiki/concepts/device-discovery.md
@@ -20,17 +20,23 @@ device carries an `id`, a `label`, a `config` blob to **auto-fill** the setup fo
 (firmware, MAC, …). The [[device-registry]]'s `isDiscoverable()` guard lets the system treat it
 as optional; the setup catalog returns a `discoverable` list of driver ids.
 
-## UHPPOTE discovery
+> **No current driver implements discovery.** The [[dingtian-relay]] board uses a fixed IP
+> (entered/known at setup). The capability remains for future UDP-discoverable devices (cameras
+> via ONVIF, etc.). The worked example below is the (removed) UHPPOTE driver — kept because the
+> **broadcast gotchas are transferable** to any UDP discovery we add later.
 
-The [[uhppote-controller]] supports discovery natively: a **UDP broadcast** (`get-devices` on
+## UHPPOTE discovery (historical example)
+
+The [[uhppote-controller]] supported discovery natively: a **UDP broadcast** (`get-devices` on
 port `60000`) that **every controller on the LAN answers** with its serial, IP, netmask, gateway,
-MAC, firmware version, and date. The official `uhppoted` lib exposes this as `getDevices(ctx)`;
-the `uhppote` driver maps each result into a `DiscoveredDevice` (serial → id, IP → host).
-**Verified on real hardware** (serial 225088491).
+MAC, firmware version, and date. The `uhppoted` lib exposed this as `getDevices(ctx)`; the
+(now-removed) `uhppote` driver mapped each result into a `DiscoveredDevice` (serial → id, IP →
+host). **Was verified on real hardware** (serial 225088491).
 
 ### Broadcast gotchas (learned the hard way — see [[wsl-dev-networking]])
 
-These cost real debugging time; the `uhppote` driver now handles all three:
+These cost real debugging time; the (removed) `uhppote` driver handled all three, and any future
+UDP-discovery driver will need to as well:
 
 1. **Broadcast to the *subnet-directed* address, not the global `255.255.255.255`.** The
    `uhppoted` lib only calls `setBroadcast(true)` when the target matches a **local interface's
diff --git a/wiki/concepts/device-registry.md b/wiki/concepts/device-registry.md
index d4f22ad..e74c71f 100644
--- a/wiki/concepts/device-registry.md
+++ b/wiki/concepts/device-registry.md
@@ -38,7 +38,8 @@ driver; **no business-logic change** — this is the [[device-adapter-pattern]]
 - Config is **validated against the driver's declared fields** before persisting.
 - Selections persist in the `lane_devices` table and drive runtime adapter construction.
 - Drivers may optionally implement **[[device-discovery]]** (`discover()`), so the admin can scan
-  the LAN instead of typing connection details — UHPPOTE does this today.
+  the LAN instead of typing connection details — no current driver uses it (the UHPPOTE did,
+  before removal; the [[dingtian-relay]] uses a fixed IP).
 
 Cameras are modelled as **snapshot-on-event**: the host requests an image at entry/exit; it's
 stored and referenced from the signed event as an **independent record** — a fraud-control input
diff --git a/wiki/concepts/uhppote-vs-esp32.md b/wiki/concepts/uhppote-vs-esp32.md
index e9a0913..3946055 100644
--- a/wiki/concepts/uhppote-vs-esp32.md
+++ b/wiki/concepts/uhppote-vs-esp32.md
@@ -7,6 +7,11 @@ updated: 2026-06-14
 
 # UHPPOTE vs. Custom ESP32 — Detection vs. Prevention
 
+> **Historical comparison.** Neither is the current device — the [[uhppote-controller]] was
+> **rejected** (entry-flow blocker → [[dingtian-relay]] chosen) and the [[esp32-custom-controller]]
+> is **deferred**. Kept because the **detection-vs-prevention** framing on the [[trust-boundary]]
+> fork is a durable lens that applies to any access device.
+
 A head-to-head on the [[trust-boundary]] fork: the off-the-shelf [[uhppote-controller]] versus
 the [[esp32-custom-controller]]. (Synthesized from [[parking-system-architecture]] §6–7.)
 
@@ -23,9 +28,10 @@ the [[esp32-custom-controller]]. (Synthesized from [[parking-system-architecture
 
 ## Bottom line
 
-- The UHPPOTE is the **current choice**: good enough as a detection/audit layer **when only the
-  host can reach it** (isolation) and every event lands in the [[append-only-event-chain]].
-- The ESP32 is the **documented upgrade** when you need a control path that holds even against an
-  attacker on the wire. They're **mixable per lane**.
+- The UHPPOTE was the **detection-grade** option: good enough as a detection/audit layer **when
+  only the host can reach it** (isolation) and every event lands in the [[append-only-event-chain]]
+  — but it was rejected for the entry lane (the button blocker).
+- The ESP32 is the **prevention-grade** option when you need a control path that holds even against
+  an attacker on the wire. Deferred.
 - Both still rely on host-side integrity ([[append-only-event-chain]]) and external
   [[reconciliation]] as the ultimate anti-fraud control.
diff --git a/wiki/decisions/open-questions.md b/wiki/decisions/open-questions.md
index afc5592..c241b29 100644
--- a/wiki/decisions/open-questions.md
+++ b/wiki/decisions/open-questions.md
@@ -27,7 +27,7 @@ status: open
    later" currently leaves a disk failure as **total revenue-history loss**.
 6. **Secure-element integration.** Confirm [[atecc608]] wiring/usage on the host (event
    signing). The [[esp32-custom-controller]] command-authentication use is **deferred — not
-   being implemented for now** (access control stays on the [[uhppote-controller]] behind
+   being implemented for now** (access control is the [[dingtian-relay]] behind
    [[network-isolation]]); revisit only if prevention-grade device auth becomes a requirement.
 7. **JWT signing: symmetric vs. asymmetric key.** _(Raised by the commit security review, not the
    source doc.)_ Auth currently uses a symmetric HMAC secret (`@fastify/jwt`, see
diff --git a/wiki/decisions/standing-decisions.md b/wiki/decisions/standing-decisions.md
index f245258..da37875 100644
--- a/wiki/decisions/standing-decisions.md
+++ b/wiki/decisions/standing-decisions.md
@@ -19,10 +19,12 @@ The decisions treated as settled in the design notes. (See [[parking-system-arch
 - **Integrity:** append-only, hash-chained, [[atecc608]]-signed event log
   ([[append-only-event-chain]]); **[[reconciliation]] is the anti-fraud control**; encryption
   protects only at-rest (see [[threat-model]]).
-- **Access control:** [[uhppote-controller]] for now, on an **isolated VLAN**
-  ([[network-isolation]]); event log used as a tamper-evident audit source with host-side index
-  tracking ([[event-log-ingestion]]). The [[esp32-custom-controller]] is the documented
-  prevention-grade upgrade path (the [[trust-boundary]] fork).
+- **Access control:** the **[[dingtian-relay]]** relay+input controller, on an **isolated VLAN**
+  ([[network-isolation]]). Chosen because its **inputs are decoupled from its relays**, enabling
+  host-in-the-loop ticket-first entry — the resolution to [[access-controller-button-flow]].
+  (The [[uhppote-controller]] and [[zkteco-controller]] were evaluated and **rejected** — kept as
+  historical record. The [[esp32-custom-controller]] remains the documented prevention-grade
+  alternative — the [[trust-boundary]] fork.)
 - **Readers:** prefer [[wiegand]]-into-controller for permit holders (autonomous); host-in-the-loop
   for [[lpr-camera|LPR]]/QR/pure-network readers; both can share a relay (see
   [[entry-exit-readers]]).
diff --git a/wiki/entities/bom.md b/wiki/entities/bom.md
index 9452eb1..b6bbdf4 100644
--- a/wiki/entities/bom.md
+++ b/wiki/entities/bom.md
@@ -14,7 +14,7 @@ payment terminal is dictated by the acquiring bank. (See [[parking-system-archit
 | --- | --- | --- |
 | Barrier operator | Magnetic Autocontrol / FAAC / CAME / Nice | Owns physical safety in firmware ([[barrier-not-a-door]]) |
 | Induction loops | Feig / BEA / EMX | Safety + free-exit detection |
-| Access controller | [[uhppote-controller]] now → ZKTeco later | Reader + relay; **isolate the VLAN** ([[network-isolation]]) |
+| Access controller | [[dingtian-relay]] relay+input board | Decoupled inputs (host-in-the-loop); **isolate the VLAN** ([[network-isolation]]). ([[uhppote-controller]]/[[zkteco-controller]] rejected) |
 | Permit readers | Nedap/Kathrein UHF, or Mifare → [[wiegand]] | Hands-free, or autonomous offline decisions |
 | Casual identity | [[lpr-camera]] (Milesight, edge AI) | Plate = ticket + independent record |
 | Ticket dispenser | Custom VKP80 | Parking-grade thermal/ESC-POS |
diff --git a/wiki/entities/uhppote-controller.md b/wiki/entities/uhppote-controller.md
index 4ca1533..29bbe70 100644
--- a/wiki/entities/uhppote-controller.md
+++ b/wiki/entities/uhppote-controller.md
@@ -1,33 +1,37 @@
 ---
 type: entity
-tags: [parking, hardware, access-control, current-choice]
+tags: [parking, hardware, access-control, rejected, historical]
 sources: [parking-system-architecture]
 updated: 2026-06-15
 ---
 
-# UHPPOTE Controller (current choice)
+# UHPPOTE Controller (rejected — historical)
 
-The starting access-control hardware: a **UHPPOTE Wiegand 26/34 network controller (4-door)** —
-a cheap reader-plus-relay frontend, acceptable **provided you understand its limits**. The plan
-is UHPPOTE now → ZKTeco later (see [[bom]]). (See [[parking-system-architecture]] §6.)
+> **❌ NOT USED. Replaced by the [[dingtian-relay]] controller** (and its driver/test code
+> removed). Kept as the record of *why* — its firmware-fixed push-button blocker
+> ([[access-controller-button-flow]]) is what drove the switch to a board with decoupled inputs.
+> The transferable lessons below (network isolation, append-only log ingestion, "a barrier is not
+> a door") still apply to any access device.
 
-> **⚠️ Entry-flow blocker (verified on hardware):** the push-button input **auto-opens the relay
-> in firmware** — there's no command to make it report-without-opening — so it **cannot** do
-> ticket-first entry (`button → print → open`). Fine as a host-**commanded relay** and for
-> [[wiegand]]/permit lanes, but **not** the button-driven entry lane as wired. Full detail and
-> options: [[access-controller-button-flow]].
+The original starting hardware: a **UHPPOTE Wiegand 26/34 network controller (4-door)** — a cheap
+reader-plus-relay frontend. (See [[parking-system-architecture]] §6.)
+
+> **⚠️ The fatal limit (verified on hardware):** the push-button input **auto-opens the relay in
+> firmware** — no command makes it report-without-opening — so it **cannot** do ticket-first entry
+> (`button → print → open`). This is *the* reason it was dropped: full detail and the resolution in
+> [[access-controller-button-flow]].
 >
-> **Verified working on the real unit** (serial 225088491, fw 09120): host-commanded `openDoor`
-> on doors 1 & 2 (physically actuated, `reason="remote open door"`); button presses captured live
-> (`reason="push button ok"`); [[device-discovery]] scan. Test scripts: `apps/server/scripts/`.
+> **What was verified on the real unit** (serial 225088491, fw 09120) before retiring it:
+> host-commanded `openDoor` on doors 1 & 2 (physically actuated, `reason="remote open door"`);
+> button presses captured live (`reason="push button ok"`); UDP-broadcast [[device-discovery]].
+> The driver, `uhppoted` dependency, and test scripts have since been removed from the codebase.
 
-> **Implementation:** integrated via the official **`uhppoted`** npm package (MIT, by the
-> `uhppoted` org — `github.com/uhppoted/uhppoted-lib-nodejs`), added to `@parking/devices` as the
-> `uhppote` access driver ([[device-registry]]). It exposes exactly the protocol commands this
-> design needs: `openDoor`, `getStatus`, and the event-log set (`getEvent`, `getEventIndex`,
-> `setEventIndex`, `recordSpecialEvents`) plus `setListener`/`listen` for auto-push — see
-> [[event-log-ingestion]]. Transport defaults to **UDP** (broadcast `…:60000`), with optional
-> per-call TCP on newer firmware. The driver also implements **[[device-discovery]]**
+> **Past implementation (removed):** was integrated via the official **`uhppoted`** npm package
+> (MIT — `github.com/uhppoted/uhppoted-lib-nodejs`) as the `uhppote` access driver. It exposed
+> exactly the protocol commands the design needs: `openDoor`, `getStatus`, and the event-log set
+> (`getEvent`, `getEventIndex`, `setEventIndex`, `recordSpecialEvents`) plus `setListener`/`listen`
+> for auto-push — see [[event-log-ingestion]]. Transport defaulted to **UDP** (broadcast `…:60000`),
+> with optional per-call TCP on newer firmware. The driver also implemented **[[device-discovery]]**
 > (`getDevices` broadcast) so the setup wizard can scan for controllers. Note: the lib pulls one
 > trivial extra dep (the npm `os` shim) and uses UDP broadcast, which needs socket broadcast
 > permission on the host.
diff --git a/wiki/entities/zkteco-controller.md b/wiki/entities/zkteco-controller.md
index 4ca9611..1bad592 100644
--- a/wiki/entities/zkteco-controller.md
+++ b/wiki/entities/zkteco-controller.md
@@ -1,20 +1,24 @@
 ---
 type: entity
-tags: [parking, hardware, access-control]
+tags: [parking, hardware, access-control, rejected, historical]
 sources: [parking-system-architecture]
 updated: 2026-06-15
 ---
 
-# ZKTeco Controller
+# ZKTeco Controller (rejected — historical)
 
-A network access controller (C3 / inBio families) — the documented "UHPPOTE now → ZKTeco later"
-upgrade in the [[bom]]. A `zkteco` driver **stub** exists in the [[device-registry]] but the
-**real protocol is not implemented** (see below).
+> **❌ NOT USED.** Was considered as the access controller; the **[[dingtian-relay]]** board was
+> chosen instead (decoupled inputs, already verified). The `zkteco` driver **stub** has been
+> **removed** from the codebase. Kept for the record of the comparison below.
 
-## Relevance to the entry-flow blocker
+A network access controller (C3 / inBio families), originally the documented "UHPPOTE now →
+ZKTeco later" upgrade in the [[bom]].
+
+## Why it was a contender (vs. UHPPOTE)
 
 ZKTeco is **better positioned** than the [[uhppote-controller]] for host-in-the-loop entry (the
-[[access-controller-button-flow]] blocker), but this is **unverified on our hardware**:
+[[access-controller-button-flow]] blocker) — but it was **never verified on our hardware**, and the
+Dingtian solved the problem first with less effort:
 
 - Its **auxiliary inputs** have **programmable linkage** (ZKBioSecurity software / PULL SDK) and
   are **not** hardwired to "open door" — so a button on an *aux* input can raise a host event
diff --git a/wiki/index.md b/wiki/index.md
index 51534be..edd6f93 100644
--- a/wiki/index.md
+++ b/wiki/index.md
@@ -32,13 +32,13 @@ Counts: 1 source · 14 entities · 10 concepts · 2 decision records.
 - [[logto-zitadel-oidc]] — OIDC providers ruled out by offline-first.
 
 ## Entities — hardware & devices
-- [[uhppote-controller]] — current access controller; cheap, tamper-evident, open-UDP, fixed firmware.
+- [[uhppote-controller]] — ❌ rejected/historical; firmware auto-open blocker drove the switch to Dingtian.
 - [[esp32-custom-controller]] — prevention-grade upgrade; device-level auth.
 - [[atecc608]] — secure element; non-extractable signing key (host events + controller auth).
 - [[wiegand]] — reader standard feeding the controller directly (autonomous permit-holder path).
 - [[lpr-camera]] — edge-AI plate recognition; host-side casual-identity source.
-- [[zkteco-controller]] — C3/inBio controller; aux-input path may enable host-in-the-loop (driver TBD).
-- [[dingtian-relay]] — relay+input board; inputs decoupled from relays → solves the button blocker (driver TBD).
+- [[zkteco-controller]] — ❌ rejected/historical; aux-input path was a contender, not pursued.
+- [[dingtian-relay]] — ✅ CHOSEN access controller; decoupled inputs solve the button blocker (driver verified on hardware).
 - [[bom]] — reference bill of materials (barrier, loops, controller, readers, payment, host, network).
 
 ## Concepts — foundational forces
@@ -54,7 +54,7 @@ Counts: 1 source · 14 entities · 10 concepts · 2 decision records.
 - [[device-adapter-pattern]] — business logic talks to interfaces; swap hardware → new adapter.
 - [[device-registry]] — catalog of selectable drivers per category (admin-configurable).
 - [[first-run-setup]] — admin assigns devices per lane from the catalog at install.
-- [[device-discovery]] — optional driver capability to scan the LAN (UHPPOTE UDP broadcast).
+- [[device-discovery]] — optional driver capability to scan the LAN (no current driver uses it; UHPPOTE was the example).
 - [[barrier-not-a-door]] — never timed-close a barrier; safety lives in barrier firmware.
 - [[trust-boundary]] — the core fork: network vs. device; auditable vs. unforgeable.
 - [[fail-state-safety]] — entry fails closed, exit fails open; manual override; watchdog.
diff --git a/wiki/log.md b/wiki/log.md
index f361f70..e7f3d32 100644
--- a/wiki/log.md
+++ b/wiki/log.md
@@ -118,3 +118,16 @@ works. The [[access-controller-button-flow]] blocker is RESOLVED. Gotcha recorde
 (GET omits it) or the write silently no-ops. Added httpPort config field (port 8080 ≠
 default 80). Test script apps/server/scripts/dingtian-test.mjs. Next: input HTTP-push
 endpoint + wiring input→ticket→pulseOpen.
+
+## [2026-06-15] cleanup | Remove UHPPOTE/ZKTeco code; wiki → rejected/historical
+Neither UHPPOTE nor ZKTeco is used (Dingtian chosen). Removed their code:
+deleted access-uhppote.ts, uhppoted.d.ts, access.ts (zkteco/esp32 stubs), the
+three uhppote-*.mjs scripts; dropped the `uhppoted` npm dep from both packages;
+unregistered uhppote/zkteco/esp32-relay from the driver registry; updated example
+comments. Catalog access drivers now = dingtian only. Build green.
+Wiki: kept the pages but marked [[uhppote-controller]] + [[zkteco-controller]]
+rejected/historical, [[uhppote-vs-esp32]] historical; re-pointed all "current
+device" framing (standing-decisions, bom, overview, open-questions) to
+[[dingtian-relay]]; noted no current driver uses [[device-discovery]]. Transferable
+concepts (network-isolation, event-log-ingestion, barrier-not-a-door, threat-model)
+kept as-is. Links lint clean; raw source untouched (immutable).
diff --git a/wiki/overview.md b/wiki/overview.md
index e19d299..3ea092f 100644
--- a/wiki/overview.md
+++ b/wiki/overview.md
@@ -29,11 +29,12 @@ deployed on-site at a parking facility. Two forces shape nearly every decision:
   rest ([[disk-os-hardening]]) defends a secondary threat.
 - **Devices** sit behind a [[device-adapter-pattern]] (swap hardware → new adapter only), with
   the [[barrier-not-a-door]] safety principle keeping physical safety in barrier-operator firmware.
-- **Access control** hinges on the [[trust-boundary]] fork:
-  [[uhppote-vs-esp32|detection vs. prevention]]. Today: [[uhppote-controller]] behind
-  [[network-isolation]], its open [[uhppote-udp-protocol]] contained, its log made trustworthy by
-  [[event-log-ingestion]]. Upgrade path: the [[esp32-custom-controller]] with
-  [[challenge-response-auth]] and [[fail-state-safety]].
+- **Access control** today is the **[[dingtian-relay]]** relay+input controller behind
+  [[network-isolation]] — chosen because its inputs are **decoupled from its relays**, enabling
+  host-in-the-loop ticket-first entry (resolving [[access-controller-button-flow]]). The
+  [[uhppote-controller]] and [[zkteco-controller]] were evaluated and **rejected** (historical).
+  The deeper fork is still the [[trust-boundary]] ([[uhppote-vs-esp32|detection vs. prevention]]);
+  the [[esp32-custom-controller]] remains the prevention-grade alternative.
 - **Readers** split two ways ([[entry-exit-readers]]): permit holders via [[wiegand]]
   (autonomous), casual/transient via host-side [[lpr-camera]] / QR; both can share a relay.
 - A reference [[bom]] lists recommended devices.
@@ -47,6 +48,6 @@ modes (fail-open on exit)**, the **reconciliation channel**, and **backup/durabi
 
 - *Security-first:* [[threat-model]] → [[append-only-event-chain]] → [[reconciliation]] →
   [[uhppote-vs-esp32]].
-- *Hardware-first:* [[bom]] → [[uhppote-controller]] → [[entry-exit-readers]] →
-  [[esp32-custom-controller]].
+- *Hardware-first:* [[bom]] → [[dingtian-relay]] → [[access-controller-button-flow]] →
+  [[entry-exit-readers]].
 - *Stack-first:* [[technology-stack]] → [[offline-first]] → [[device-adapter-pattern]].