I wonder if there is information about the internal connections between the RP2040 and the ESP8266 that I presume are the Wio 2040.
I would like to use the RPI SDK and the esp-idf respectively in order to do some lower level programming, so in addition to the RP2040 programming that I guess is pretty obvious by burning a new uf2 image, I would like to know how to flash the internal ESP8266 as well.
It seems that the chip responsible for the Wifi is not the ESP 8266 but the ESP 8285. I gathered some of what I discovered in this post here:
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If there was a complete schematic, with the connections between the RP2040 and the ESP8285, it would be excellent. But notice that, even in the product description, we don’t even have the chip responsible for the Wifi interface.