""Thank you, but how AIS alarm can switch on GPIO pin ?""
you can look into this node i haven't played with it yet but looks like it would work, probably work for anchor watch too..
https://flows.nodered.org/node/node-red-...b-geofence
https://www.npmjs.com/package/node-red-node-geofence
opencpn has AIS "sound cpa alarm"
you can look into this node i haven't played with it yet but looks like it would work, probably work for anchor watch too..
https://flows.nodered.org/node/node-red-...b-geofence
https://www.npmjs.com/package/node-red-node-geofence
opencpn has AIS "sound cpa alarm"