OpenMarine

Hi There All,

I have just built an Anemometer with a 3144 Hall Effect Sensor. 

I have successfully interfaced with GPIO17, a 3.3v and GND PIN on Rasp Pi 4 running a python3 script. So I know it works.

My question is how I can interface this directly with OpenPlotter using the GPIO Settings to display windspeed to the dashboards via SignalK?

I have delved into the GPIO settings interface and see options for Pulse/Digital, rotations, radius, m/s etc and presume this has some relevance.

There is nothing (that I found) in the documentation to help me navigate this. Am I on the right track? Is this even possible? Happy to update the docs if we get this running.

Running OP 2.
Thanks in advance.

Crocks32

I haven't done it, but from looking at the OpenPlotter GPIO app, it looks like you can do what you want entirely in that app. Just get the pulses/second from that GPIO pin mapped properly to meters/second, then assign a relevant SignalK key to it. If you need to know what SignalK key you'll need to use, the SignalK web site has a reference document that should give you what you need. It will be something like environment.wind.speedApparent and/or environment.wind.angleApparent.

Once it's in SignalK, you can use it directly in OpenCPN and other OpenPlotter apps, or convert it to NMEA0183 or NMEA2000 as you need it.