       StaticJsonBuffer<128> jsonBuffer;
       JsonObject& root = jsonBuffer.parseObject(json);
       String mode = root["mode"];
-      String position;
+      String position = root["position"];
       if (mode == "s") {
         position = mode;
-      }
-      else {
-        position = root["position"];
       }
       iotCore.setApplicationParam(POSITION_PARAM, position);
       lastRefreshChangeAt = millis();

      B00100010,
      B00011100 },
    // 9
    { B00000000,
      B00011100,
      B00100010,
      B00100010,
      B00011100,
      B00000010,
      B00000010,
      B00111100 },
    // 10
    { B00000000,
      B01000110,
      B11001001,
      B01001001,
      B01001001,
      B01001001,
      B01001001,
      B11100110 },
    // 11
    { B00000000,
      B01000100,
      B11001100,
      B01000100,
      B01000100,
      B01000100,
      B01000100,
      B11101110 },
    // 12
    { B00000000,
      B01001110,
      B11000001,
      B01000001,
      B01000110,
      B01001000,
      B01001000,
      B11101111 },
    // s
    { B00000000,
      B00011100,
      B00100010,
      B00100000,
      B00011100,


byte symbols[14][8] = {
    // ?
    { B00011100,
      B00100010,
      B00000100,
      B00001000,
      B00001000,
      B00001000,
      B00000000,
      B00001000 },
    // 1
    { B00001000,
      B00011000,
      B00001000,
      B00001000,
      B00001000,
      B00001000,
      B00001000,
      B00011100 },
    // 2
    { B00011100,
      B00100010,
      B00000010,
      B00000010,
      B00011100,
