2018-09-08, 06:01 PM
For the autopilot you would not be using node red. While in theory it is possible, there is too much lag and node read is not meant for real time applications.
Yes you can use the pi gpio directly, but you still need a way to detect the rudder stops. If you use switches, you can use gpio input for those. Otherwise, rudder-feedback and motor stall detection both require analog to digital converter as well as monitoring temperature and voltages, and a way to isolate the raspberry. So for my controllers I already have a uC no reason to use the raspberry gpio, that is why I don't use it.
Yes you can use the pi gpio directly, but you still need a way to detect the rudder stops. If you use switches, you can use gpio input for those. Otherwise, rudder-feedback and motor stall detection both require analog to digital converter as well as monitoring temperature and voltages, and a way to isolate the raspberry. So for my controllers I already have a uC no reason to use the raspberry gpio, that is why I don't use it.