hi
I create a serial connection /dev/ttyS0 ,set the baudrate, as an output in open plotter, after that i make a physical link to my PC (from the PI GPIO TX pin via an optocoupler to a serial to usb converter to the pc usb port)
After that I open the usb serial port in open cpn for example
the output from this connection is erratic but becomes completely stable when i start the nmea inspector
I've no explanation for this behaviour
NB on a Pi3 /dev/ttyS0 = /dev/ttyAM0 on a Pi2
I create a serial connection /dev/ttyS0 ,set the baudrate, as an output in open plotter, after that i make a physical link to my PC (from the PI GPIO TX pin via an optocoupler to a serial to usb converter to the pc usb port)
After that I open the usb serial port in open cpn for example
the output from this connection is erratic but becomes completely stable when i start the nmea inspector
I've no explanation for this behaviour
NB on a Pi3 /dev/ttyS0 = /dev/ttyAM0 on a Pi2