you could also use node red there's a geofence node included in signalk's embedded N-R, and get the ais data from the signalk stream, then you can make it do whatever you want it to do. flash a light, buzzer, horn, use a relay ect. you have access to the gpio's in node red. another thing i use an arduino mega with firmata connected to usb to get a lot more gpio's and analog within node red + its 5v tolerant.
i am interested in something like that too as i will be single handling mostly. so if you get something worked out please post about it.
i am interested in something like that too as i will be single handling mostly. so if you get something worked out please post about it.