You component as baseline for OpenDTU (CMT2300A) communication ?

[SeByDocKy]

Hello,

First of all thx for the work you did for the tuyaRF device.
My question (sorry to open an issue for that) is about the CMT2300A part. For communication with some solar devices (for example Hoymiles micro-inverter HMS serie), a CMT2300A is used as RF chip.

I wonder if it possible to use your work to make a standalone cmt2300A component (also adding the frequency, tx power and bw settings). I want to know of with your current component you manages to initialize correctly the half-duplex spibus and cmt2300A registers ? and of course all fifo/packet tx/rx functions ?

Kind regards,

Sébastien

[olivluca]

For the cmt2300a part I just adapted some (bad) code I found on github.
The chip can do most of the encoding/decoding by itself, but in this implementation (just like in the tuya firmware) I use direct mode, i.e. the chip works as an rf modulator/demodulator, no decoding, no fifo, no nothing.
I got the initialization parameters (in cmt2300a_params_captured.h) from the tuya initialization sequence. In theory you should use the rfpk tool, but I couldn't manage to reconstruct the same byes that tuya uses.
See this post and the following ones.

[olivluca]

BTW: https://github.com/kvj/esphome_Hoymiles_Inverter

[SeByDocKy]

BTW: https://github.com/kvj/esphome_Hoymiles_Inverter

Yes I know this component but unfortunatly it makes the ESP32 crash at CMT2300A initialization .... :(