Modbus-RTU?

[fencepost-error]

Did anyone else who came here from the YT video think the protocol looks a bit like Modbus-RTU? When I saw the 01 04 ... my mind automatically said device ID 1, read input registers, address, length, and CRC. OK, there's a few discrepancies (8 vs 16-bit length) but the rest looks pretty similar to Modbus. Is the 01 definitely the read code and not the 04?

[mnh-jansson]

I think you'll find that 01 04 is the only similarities you'll find between this protocol and Modbus. Checksum is not CRC, second byte is just a access number (we can put this to basically any number), length is different, response format is different etc..

[fencepost-error]

Ah, fair enough. My mind just said (almost) modbus when I saw the diagram on the video flash by.