SeaTalk 1 to NMEA0183/2000 with Raspberry Pi

[ckckrs]

https://github.com/dnegrotti/seatalk1_ou...lk1_out.py

You can import the flow directly into Nodered with this code:

Code:

[{"id":"c964b9cf.79b678","type":"signalk-app-event","z":"46419c75.a897b4","name":"NMEA0183 Out","event":"seatalkOut","x":110,"y":140,"wires":[["4633789b.f5aac8"]]},{"id":"4633789b.f5aac8","type":"python-function","z":"46419c75.a897b4","name":"Seatalk1 Out","func":"#!/usr/bin/env python\n#Sends seatalk1 datagrams to serial output\n#By Cari20 (2020) loosely based on Marco Bergman ST2000 RPi remote\n\nimport RPi.GPIO as GPIO\nimport serial\nimport binascii\n\nmsg2 = msg['payload']\nlst = msg2.split(\"*\")[0].split(\",\")\nlst.append(msg2.split(\"*\")[1])\n\nif lst[0]=='$STALK':\n  with serial.Serial('/dev/serial0', 4800, timeout=10, writeTimeout=0) as ser:\n      ser.parity = serial.PARITY_MARK\n      ser.write(binascii.unhexlify(lst[1]))\n      ser.parity = serial.PARITY_SPACE\n      for i in lst[2:-1]:\n        ser.write(binascii.unhexlify(i))\n      ser.close()\n\nreturn msg","outputs":1,"x":290,"y":140,"wires":[[]]}]

With this setup you can have bidirectional communication with the ST2000 and the autopilot app is fully functional, I have a very long ToDo list to keep adding functionality, as I mentioned before the ST40 emulation and also the OpenCPN waypoint navigation. This can be extended to any signalk event provided you translate it to a seatalk1 datagram and inject the message into the “Seatalk1 Out” node. 

If you (or any other member) need any further details feel free to enquire.

Cari20

Cari20, Great work and also for SignalK team.
When I imported and examine the node for phyton function while waiting my circuit parts for boat test, I see the some parsing for *$STALK but when I tested this on phyton at VSC at home, the output is not exactly what I expected. 
I'm not experienced on programming maybe  I'm missing something here?
Your support appreciated,
Thanks,Sancan
Test code and result is:
#Sends seatalk1 datagrams to serial output\
#By Cari20 (2020) loosely based on Marco Bergman ST2000 RPi remote\
msg2 = '*$STALK,30,00,0C'
print(msg2)
lst = msg2.split('*')[0].split(',')
print(lst)
lst.append(msg2.split('*')[1])
print(lst)
if lst[0]=='*$STALK':
   print('helloinif')
   for i in lst[2:-1]:
       print(lst[i])
       print('helloinloop')
Sancans-MacBook-Pro-2:~ sensesp$ /usr/bin/python /Users/sensesp/Documents/PythonScripts/gpioseatalk.py

*$STALK,30,00,0C

['']

['', '$STALK,30,00,0C']
Sancans-MacBook-Pro-2:~ sensesp$