2021-11-01, 12:22 AM
I too have been unsuccessfull in getting nmea 0183 into my uniden new vhf. I have a neo -6M module (card) that puts out RX/TX serial. I get the signal into my arduino autopilot no issues, and can read the sentences via the arduino serial terminal. And also via usb - serial converter, from the arduino to my laptop chartplotter (in active use). All had no issues. I tried connecting this output directly to the vhf and tried reversing connections etc.The uniden saw nothing. I then put in a separate circuit using a serial to RS485 converter - again, the vhf saw nothing. I upped the voltage from 3.3 to 5v ---- still nothing.
I researched nmea 0183 specs - this is really a pretty messed up "standard". All I found out was that it is unknown what actually the uniden expects to see. I called their service and they were unwilling to give any specifics ...like is it +5v/_5v,.....or only +5v/0V .... do they fully comply with nmea0183 ver2 etc.
If anyone has any guidance it would be appreciated.
Richard
SV Zolanda
Nanaimo BC
I researched nmea 0183 specs - this is really a pretty messed up "standard". All I found out was that it is unknown what actually the uniden expects to see. I called their service and they were unwilling to give any specifics ...like is it +5v/_5v,.....or only +5v/0V .... do they fully comply with nmea0183 ver2 etc.
If anyone has any guidance it would be appreciated.
Richard
SV Zolanda
Nanaimo BC