Is it posible to have Seatalk1 output?

[holgerw]

i would go another way to deal with these old protocols,
just use an ESPxx and its USB or WiFi Port to communicate with the pi.

[abarrow]

ESP32s have to bit-bang as well, but libraries for that are fairly well known. Arduino Unos or Megas will do 9 bit data in their installed UARTs.

If you have one of the Yak products, if you look inside they have what looks like a Teensy or Arduino, and only a few extra parts. Adding more (and the appropriate programming) is do-able.

[broosmaxim]

Does anyone have a working bit of code that runs on an ESP32 that reads Seatalk1 and feeds it to SignalK?

[sebba]

Does anyone have a working bit of code that runs on an ESP32 that reads Seatalk1 and feeds it to SignalK?

sorry, I don't have, but what is the reason to use ESP32 instead of a simple optocoupler and some shielded cable?

[abarrow]

If you use an ESP32, you'll have to bit-bang. The internal UARTs can't be set to 9 bit data.