Hi,

Is anyone else working on this radio?

Having obtained one of these radios, I have started the processes of reverse engineering the protocol to enable Chirp to talk to it.

So far I believe I have worked out the communications protocol: Serial coms are at 19200 baud and the data is passed in variable length records with a checksum.

Record structure: Offset Usage 0 start of record (\x7d) 1 Command (\x80 Identify \x81 End/Reboot \x82 Read \x83 Write) 2 direction (\xff PC-> Radio, \x00 Radio -> PC) 3 length of payload (excluding header/checksum) (n) 4 payload (n bytes) 4+n+1 checksum - byte sum (% 256) of bytes 1 -> 4+n

Memory Read Records: the request payload is 3 bytes, first 2 are offset (big endian), 3rd is number of bytes to read

Memory Write Records: The maximum payload size (from the Wouxun software) seems to be 66 bytes (2 bytes location + 64 bytes data).

I have got as far as getting Chirp to successfully identify the radio.

A Gotcha: the first identify packet returns a bad checksum, subsequent attempts return the correct checksum... (well it does on my radio!)

The ID record returned by the radio also includes the current frequency range as 4 bytes big endian in 10Hz increments

Offset 00:10 Model name (Use 0:6 to get 'KG-UV8D') 11:14 UHF lower limit 1 (in increments of 10Hz) 15:18 UHF upper limit 1 19:22 UHF lower limit 2 23:26 UHF upper limit 2 27:30 VHF lower limit 1 31:34 VHF upper limit 1 35:38 VHF lower limit 2 39:42 VHF upper limit 2 43:46 zeros

Limit 1 = Rx and Limit 2 = Tx (just my guess!)