Hello, I don't quite understand what you mean. Could you describe the problem in detail?

For AT communicate over SPI, you can refer to https://docs.espressif.com/projects/esp-at/en/latest/Compile_and_Develop/How_to_implement_SPI_AT.html.


Hi,

Maybe it would be best if I explained how it works ...

If I'm understanding this right, the SPI interface just provides a transport for the same AT command set and responses. In my particular case it would be worse than the UART interface - just as difficult to parse, probably harder to set up DMA for, and since I've only got one SPI interface available ...

tl;dr: Is there a binary equivalent of the AT command set? By which I mean one that doesn't use plain ASCII text but rather a consistent binary format?

I've been using the SiLabs WGM110 for years. It was derived from the BlueGiga WF121 and uses the same binary BGAPI interface. I'd looked at the ...