beacon.txt

       L           L     apple 
0000   02 01 1a    0b ff 4c 00 09 06 03 05 c0 a8 1f e3      ....ÿL.....À¨.ã
//URL
       L           L       google     L  service id  google
0000   02 01 06    03 03   aa fe      11 16 aa fe 10 00 01 6e 6f   .....ªþ..ªþ...no
0010   72 64 69 63 73 65 6d 69 00                        rdicsemi.
//TLM
0000   02 01 06     03 03   aa fe     11 16 aa fe 20 00 0d d4 12   .....ªþ..ªþ ..Ô.
0010   00 00 00 00 0a 00 00 08 9b                        .........

serviceUUID: 0000feaa-0000-1000-8000-00805f9b34fb, serviceDataUUID: 0000feaa-0000-1000-8000-00805f9b34fb,

manufacture specifi  0xff
apple 0x004c
16-bit service class UUID  0x03
goole 0xffae
service data  0x16


0x01 = Flags

0x03 = Complete List of 16-bit Service Class UUIDs

0x09 = Complete Local Name

0x08 = Shortened Local Name

0x0A = Tx Power Level

0xFF = Manufacturer-specific data


/* TLM advertising data: */
uint8_t advdata_tlm[] =
{
  0x03,  // Length
  0x03,  // Param: Service List
  0xAA, 0xFE,  // Eddystone ID
  0x11,  // Length
  0x16,  // Service Data
  0xAA, 0xFE, // Eddystone ID
  0x20,  // TLM flag                   //0x10 URL   0x00 UUID
  0x00, // TLM version
  /* [10] */ 0x00, 0x00,  // Battery voltage
  /* [12] */ 0x80, 0x00,  // Beacon temperature
  /* [14] */ 0x00, 0x00, 0x00, 0x00, // Advertising PDU count
  /* [18] */ 0x00, 0x00, 0x00, 0x00 // Time since reboot
};