Control a Philips Hue room from a wall switch

1// Hue wall switch: a switch on a Shelly input controls a Philips Hue room2// through the Hue Bridge on your Wi-Fi. No Home Assistant, no cloud.3 4let CONFIG = {5  bridgeIp: "192.168.1.20",6  roomName: "Living room",7  inputId: 0,8  appKey: "",9};10 11// The bridge only hands out a key in the 30 seconds after its button is12// pressed. Ask every 3 seconds for a minute, which covers walking to it.13let PAIR_EVERY_SEC = 3;14let PAIR_FOR_SEC = 60;15let KVS_KEY = "hue-app-key";16 17let key = CONFIG.appKey;18let roomLight = null;19let roomLabel = CONFIG.roomName;20let homeLight = null;21let busy = false;22let pairTimer = null;23let pairUntil = 0;24let bridgeAnswered = false;25 26function hue(method, path, body, callback) {27  let req = {28    method: method,29    url: "https://" + CONFIG.bridgeIp + path,30    headers: { "hue-application-key": key },31    // The bridge's certificate is self-signed, so it can't be checked against32    // the Shelly's built-in list. The request never leaves your network.33    ssl_ca: "*",34    timeout: 10,35  };36  if (body !== null) req.body = JSON.stringify(body);37  Shelly.call("HTTP.Request", req, callback);38}39 40function failed(res, err, what) {41  if (err !== 0) {42    print("Couldn't reach the Hue Bridge at " + CONFIG.bridgeIp + " to " + what + ".");43    return true;44  }45  if (res.code === 403) {46    print("The bridge refused the key. Set appKey to \"\" and restart to pair again.");47    Shelly.call("KVS.Delete", { key: KVS_KEY });48    return true;49  }50  if (res.code !== 200) {51    print("The bridge answered " + res.code + " when asked to " + what + ".");52    return true;53  }54  return false;55}56 57function onSet(res, err) {58  busy = false;59  failed(res, err, "switch the lights");60}61 62function setLight(id, state) {63  hue("PUT", "/clip/v2/resource/grouped_light/" + id, state, onSet);64}65 66function onRoomState(res, err) {67  if (failed(res, err, "read the room")) {68    busy = false;69    return;70  }71  let on = JSON.parse(res.body).data[0].on.on;72  print(roomLabel + (on ? " off." : " on."));73  setLight(roomLight, { on: { on: !on } });74}75 76function press(kind) {77  if (roomLight === null) {78    print("Still looking for the room. Try again in a moment.");79    return;80  }81  if (busy) return;82  busy = true;83  if (kind === "toggle") {84    hue("GET", "/clip/v2/resource/grouped_light/" + roomLight, null, onRoomState);85  } else if (kind === "bright") {86    print(roomLabel + " to full brightness.");87    setLight(roomLight, { on: { on: true }, dimming: { brightness: 100 } });88  } else {89    print("Every Hue light off.");90    setLight(homeLight, { on: { on: false } });91  }92}93 94function onEvent(ev) {95  if (ev.info.component !== "input:" + CONFIG.inputId) return;96  let e = ev.info.event;97  if (e === "single_push") press("toggle");98  else if (e === "double_push") press("bright");99  else if (e === "long_push") press("all-off");100}101 102// A rocker (input type Switch) has no pushes: every flip toggles the room.103function onStatus(st) {104  if (st.component !== "input:" + CONFIG.inputId) return;105  if (typeof st.delta.state === "boolean") press("toggle");106}107 108function groupedLight(item) {109  for (let i = 0; i < item.services.length; i++) {110    if (item.services[i].rtype === "grouped_light") return item.services[i].rid;111  }112  return null;113}114 115function onHome(res, err) {116  if (failed(res, err, "find the whole-home group")) return;117  homeLight = groupedLight(JSON.parse(res.body).data[0]);118  print("Ready. Use the switch.");119}120 121function onRooms(res, err) {122  if (failed(res, err, "list the rooms")) return;123  let rooms = JSON.parse(res.body).data;124  let names = [];125  let want = CONFIG.roomName.toLowerCase();126  for (let i = 0; i < rooms.length; i++) {127    let name = rooms[i].metadata.name;128    names.push(name);129    if (name.toLowerCase() === want) {130      roomLight = groupedLight(rooms[i]);131      roomLabel = name;132    }133  }134  if (roomLight === null) {135    print("No room called " + CONFIG.roomName + ". The bridge has: " + names.join(", ") + ".");136    return;137  }138  hue("GET", "/clip/v2/resource/bridge_home", null, onHome);139}140 141function findRoom() {142  hue("GET", "/clip/v2/resource/room", null, onRooms);143}144 145function stopPairing() {146  Timer.clear(pairTimer);147  pairTimer = null;148}149 150function onPair(res, err) {151  if (pairTimer === null || err !== 0) return;152  bridgeAnswered = true;153  let reply = JSON.parse(res.body)[0];154  if (reply.success) {155    stopPairing();156    key = reply.success.username;157    Shelly.call("KVS.Set", { key: KVS_KEY, value: key });158    print("Paired with the Hue Bridge. The key is saved on this Shelly.");159    findRoom();160  }161}162 163function askForKey() {164  if (Shelly.getUptimeMs() > pairUntil) {165    stopPairing();166    if (bridgeAnswered) print("No button press seen. Restart the script to try again.");167    else print("Couldn't reach a Hue Bridge at " + CONFIG.bridgeIp + ". Check bridgeIp.");168    return;169  }170  Shelly.call("HTTP.Request", {171    method: "POST",172    url: "https://" + CONFIG.bridgeIp + "/api",173    body: JSON.stringify({ devicetype: "shelly#hue-wall-switch" }),174    ssl_ca: "*",175    timeout: 5,176  }, onPair);177}178 179function onSavedKey(res, err) {180  if (err === 0 && res && typeof res.value === "string") {181    key = res.value;182    findRoom();183    return;184  }185  print("Press the round button on your Hue Bridge now. Waiting " + PAIR_FOR_SEC + " seconds.");186  pairUntil = Shelly.getUptimeMs() + PAIR_FOR_SEC * 1000;187  pairTimer = Timer.set(PAIR_EVERY_SEC * 1000, true, askForKey);188}189 190Shelly.addEventHandler(onEvent);191Shelly.addStatusHandler(onStatus);192print("Hue wall switch started.");193if (key !== "") findRoom();194else Shelly.call("KVS.Get", { key: KVS_KEY }, onSavedKey);