Seatalk1 to NMEA0183 with Arduino

[PaddyB]

I am also working on this, I want to use a ESP8266 module NodeMCU 12-E to convert the ST1 to SignalK and send it wireless to the SignalK server. 
So far I ahve not figured out how to use the SoftwareSerial in 9 bit mode. The SoftwareSerial works nicely in normal 8 bit mode. It should be doable to flip
it into 9 bit mode (it's software !) and decoding the ST1 messages is already documented. 

Today I'm using a ST1 to USB-NMEA, but I really want to get rid of the cabels. 

Ole

Interesting. Today I've got the hardware uarts 1 & 2 seeming to work solid on an esp32 with micropython but they won't do 9 bit. Not sure if there's a software serial for micropython, google came up with talk of uS timing problems. PyBoards do 9 bit hardware, it says...
https://docs.micropython.org/en/latest/l....UART.html