WLED/wled00/wled15_hue.ino

/*
 * Sync to Philips hue lights
 */
#ifndef WLED_DISABLE_HUESYNC
void handleHue()
{
  if (hueReceived)
  {
    colorUpdated(7); hueReceived = false;
    if (hueStoreAllowed && hueNewKey)
    {
      saveSettingsToEEPROM(); //save api key
      hueStoreAllowed = false;
      hueNewKey = false;
    }
  }
  
  if (!WLED_CONNECTED || hueClient == nullptr || millis() - hueLastRequestSent < huePollIntervalMs) return;

  hueLastRequestSent = millis();
  if (huePollingEnabled)
  {
    reconnectHue();
  } else {
    hueClient->close();
    if (hueError[0] == 'A') strcpy(hueError,"Inactive");
  }
}

void reconnectHue()
{
  if (!WLED_CONNECTED || !huePollingEnabled) return;
  DEBUG_PRINTLN("Hue reconnect");
  if (hueClient == nullptr) {
    hueClient = new AsyncClient();
    hueClient->onConnect(&onHueConnect, hueClient);
    hueClient->onData(&onHueData, hueClient);
    hueClient->onError(&onHueError, hueClient);
    hueAuthRequired = (strlen(hueApiKey)<20);
  }
  hueClient->connect(hueIP, 80);
}

void onHueError(void* arg, AsyncClient* client, int8_t error)
{
  DEBUG_PRINTLN("Hue err");
  strcpy(hueError,"Request timeout");
}

void onHueConnect(void* arg, AsyncClient* client)
{
  DEBUG_PRINTLN("Hue connect");
  sendHuePoll();
}

void sendHuePoll()
{
  if (hueClient == nullptr || !hueClient->connected()) return;
  String req = "";
  if (hueAuthRequired)
  {
    req += "POST /api HTTP/1.1\r\nHost: ";
    req += hueIP.toString();
    req += "\r\nContent-Length: 25\r\n\r\n{\"devicetype\":\"wled#esp\"}";
  } else
  {
    req += "GET /api/";
    req += hueApiKey;
    req += "/lights/" + String(huePollLightId);
    req += " HTTP/1.1\r\nHost: ";
    req += hueIP.toString();
    req += "\r\n\r\n";
  }
  hueClient->add(req.c_str(), req.length());
  hueClient->send();
  hueLastRequestSent = millis();
}

void onHueData(void* arg, AsyncClient* client, void *data, size_t len)
{
  if (!len) return;
  char* str = (char*)data;
  DEBUG_PRINTLN(hueApiKey);
  DEBUG_PRINTLN(str);
  //only get response body
  str = strstr(str,"\r\n\r\n");
  if (str == nullptr) return;
  str += 4;

  StaticJsonDocument<512> root;
  if (str[0] == '[') //is JSON array
  {
    auto error = deserializeJson(root, str);
    if (error)
    {
      strcpy(hueError,"JSON parsing error"); return;
    }
    
    int hueErrorCode = root[0]["error"]["type"];
    if (hueErrorCode)//hue bridge returned error
    {
      switch (hueErrorCode)
      {
        case 1: strcpy(hueError,"Unauthorized"); hueAuthRequired = true; break;
        case 3: strcpy(hueError,"Invalid light ID"); huePollingEnabled = false; break;
        case 101: strcpy(hueError,"Link button not pressed"); hueAuthRequired = true; break;
        default:
          char coerr[18];
          sprintf(coerr,"Bridge Error %i",hueErrorCode);
          strcpy(hueError,coerr);
      }
      return;
    }
    
    if (hueAuthRequired)
    {
      const char* apikey = root[0]["success"]["username"];
      if (apikey != nullptr && strlen(apikey) < sizeof(hueApiKey))
      {
        strcpy(hueApiKey, apikey);
        hueAuthRequired = false;
        hueNewKey = true;
      }
    }
    return;
  }

  //else, assume it is JSON object, look for state and only parse that
  str = strstr(str,"state");
  if (str == nullptr) return;
  str = strstr(str,"{");
  
  auto error = deserializeJson(root, str);
  if (error)
  {
    strcpy(hueError,"JSON parsing error"); return;
  }

  float hueX=0, hueY=0;
  uint16_t hueHue=0, hueCt=0;
  byte hueBri=0, hueSat=0, hueColormode=0;

  if (root["on"]) {
    if (root.containsKey("bri")) //Dimmable device
    {
      hueBri = root["bri"];
      hueBri++;
      const char* cm =root["colormode"];
      if (cm != nullptr) //Color device
      {
        if (strstr(cm,"ct") != nullptr) //ct mode
        {
          hueCt = root["ct"];
          hueColormode = 3;
        } else if (strstr(cm,"xy") != nullptr) //xy mode
        {
          hueX = root["xy"][0]; // 0.5051
          hueY = root["xy"][1]; // 0.4151
          hueColormode = 1;
        } else //hs mode
        {
          hueHue = root["hue"];
          hueSat = root["sat"];
          hueColormode = 2;
        }
      }
    } else //On/Off device
    {
      hueBri = briLast;
    }
  } else
  {
    hueBri = 0;
  }

  strcpy(hueError,"Active");
  
  //apply vals
  if (hueBri != hueBriLast)
  {
    if (hueApplyOnOff)
    {
      if (hueBri==0) {bri = 0;}
      else if (bri==0 && hueBri>0) bri = briLast;
    }
    if (hueApplyBri)
    {
      if (hueBri>0) bri = hueBri;
    }
    hueBriLast = hueBri;
  }
  if (hueApplyColor)
  {
    switch(hueColormode)
    {
      case 1: if (hueX != hueXLast || hueY != hueYLast) colorXYtoRGB(hueX,hueY,col); hueXLast = hueX; hueYLast = hueY; break;
      case 2: if (hueHue != hueHueLast || hueSat != hueSatLast) colorHStoRGB(hueHue,hueSat,col); hueHueLast = hueHue; hueSatLast = hueSat; break;
      case 3: if (hueCt != hueCtLast) colorCTtoRGB(hueCt,col); hueCtLast = hueCt; break;
    }
  }
  hueReceived = true;
}
#else
void handleHue(){}
void reconnectHue(){}
#endif