Remote Protocol (Patreon)

By request, here is the nicFW880 remote protocol

Remote Activation

To begin send the "Change BAUD" sequence at 38400 baud

• 0xaa

• 0x70

• [4 bytes little endian, New BAUD rate]

The radio will acknowledge with

• 0x70

at this point change the host's BAUD rate to match. 100ms later the radio will send another acknowledge at the new BAUD rate

• 0x70

Now send the "Start Remote" sequence.

• 0xAA

• 0x51

Remote operation is now active.

Remote Operation

The host must every second send a PING byte

• 0xAA

the radio will acknowledge this (PONG) with the same byte

• 0xAA

HOST to RADIO commands.
These are single byte commands and are NOT acknowledged.

• 0x13 - PTT pressed

• 0xFE - PTT Released

• 0x00 to 0x12 - Keypad key pressed

• 0xFF - Keypad key released

• 0x52 - Exit remote

RADIO to HOST commands.

Draw Text

• 0x02 = Packet signature

• [1 byte] = Screen X coordinate

• [2 bytes little endian] = Screen Y coordinate

• [1 byte] = Font Number

  • 0x00 = 8x8 ASCII Font

  • 0x01 = 8x16 ASCII Font

  • 0x02 = 16x16 ASCII Font

  • 0x03 = 16x24 ASCII Font

  • 0x04 = 24x24 ASCII Font

  • 0x05 = 24x32 ASCII Font

  • 0x06 = 16x16 Symbols Font

• [2 bytes] = RGB565 background colour

• [2 bytes] = RGB565 foreground colour

• [variable bytes] Null terminated ASCII text

Draw Rectangle

• 0x01 = Packet signature

• [1 byte] = Screen X coordinate

• [2 bytes little endian] = Screen Y coordinate

• [1 byte] = Width

• [2 bytes little endian] = Height

• [2 bytes] = RGB565 colour