/*
  All data little endian
  uint8_t     size;   // = 19
  uint8_t     uid;    // = 0x16, 16-bit UUID
  uint16_t    UUID;   // = 0x181A, GATT Service 0x181A Environmental Sensing
  uint8_t     MAC[6]; // [0] - lo, .. [5] - hi digits
  int16_t     temperature;    // x 0.01 degree     [6,7]
  uint16_t    humidity;       // x 0.01 %          [8,9]
  uint16_t    battery_mv;     // mV                [10,11]
  uint8_t     battery_level;  // 0..100 %          [12]
  uint8_t     counter;        // measurement count [13]
  uint8_t     flags;  [14]
  */