Have a project
to monitor Nmea 0183
boat I'm on at the moment badly needs a Polar diagram to assist us in becoming more competitive.
I successfully connected Nmea 0183
out from a C120W (Raymarine plotter), using a RS422 to USB connection.
and crew request is for bluetooth so they can play with their tablets. As a first step, I tried RS232
, it didn't work. Now I know that Nmea
0183 is differential signal, But I have tried different ways of connecting without success, my last attempt was using Yellow +TX of the C120W and Battery
-ve across terminal 2, 3 or 5 of DB9. I also tried the bluetooth, Which had been paired but all possible connections seems to unpair the bluetooth.
is on battery
power so should not be a ground loop issue, eventually I'll use opto isolation.
Starting to think I need a "cro" to understand better whats going on, but any pointers on recommended connections or signal conversion.