espthernet

cnlohr managed to add Ethernet to a esp8266 module (1) using the i2s signals also present in the esp32-c3 and a driver plus magnetics. Once the transformer is in place, passive PoE can be added with a regulator connected to the relevant transformer pins, probably 2 and 7 in the schematic at (2), but yeah, the size grows significantly. 1- https://github.com/cnlohr/espthernet 2- https://github.com/cnlohr/espthernet/blob/gh-pages/hardware/...

Cnohlr did just this, although he strongly suggests using proper interfacing, but having the bare signal wires at hand can be useful for chip to chip communications on the same board. One could build a board with N ESP chips then connect them directly by daisy chaining their TX and RX pins, that is, passing packets in circle, or behind an Ethernet switch chip, de facto creating a board level local network. Might be interesting for some applications. https://github.com/cnlohr/espthernet

Mouse and keyboard: https://www.youtube.com/watch?v=FPBzOaLbWhM Ethernet: https://github.com/cnlohr/espthernet PAL TV: https://hackaday.com/2016/03/01/color-tv-broadcasts-are-esp8... I haven't yet seen an FM transmitter though, but it's been done on the Raspberry Pi GPIO so I guess it could be done on the ESP also.

There's a partial port on the ESP32. It seems lacking many features over the ESP8266 one, though the project is a lot younger. https://github.com/martin-ger/esp32_nat_router I recall that somebody found that the ESP8266 (no info about the ESP32) can talk directly to Ethernet devices, albeit it lacks a proper PHY with magnetics. https://github.com/cnlohr/espthernet It could be handy to avoid using the same WiFi subsystem both to connect to the WAN and to accept connections from all clients, which I believe has a huge performance impact. Now what if we wanted to overcome the speed and number of users limitations by connecting two or more ESP boards in a magnetic-less way, either crossing tx and rx pairs in case of two chips, or using a switch chip such as the RTL8306 to connect more than two ESPs? I think it would be possible. More as an ex