Very new and inexperienced but hoping I can at least get pointed in the right direction. I am trying to create a DIY spot lock using an engine mounted trolling motor.
I already have steering sorted via a lowrance autopilot kit and can set tracks via my chart plotter, it steers my outboard which my trolling motor is attached to. I need ardupilot to be able to control the speed only of my Minn Kota RT80EM so that I can hold my gps position i.e. spot lock/anchor mode. Currently speed is controlled with a rotary switch. Max current at top speed is 58A.
Ideally I would l like to keep the rotary switch but have a single button that I press and the controller cuts in and out using PWM to keep the boat on the spot, the lowrance autopilot will make any steering corrections.
How possible is this for an absolute novice?