Raymarine SeaTalk 1 Autopilot Remote

Aim is to control my ST2000 tiller pilot, and see other boat data using my iphone. The project is based on:

1. APRemote software from GitHub,

2. An ESP32,

3. SeaTalk1 interface electronics.

4. Prototype testing

1. APRemote software from GitHub,

The 2022 orignial by Richard JG is here. in 2023 it didnt compile for me (library issues). Im working on it...

2. An ESP32

Just a standard ESP32 DevKit from ebay.

3. Seatalk 1 Interface Electronics.

The Raymarine (5V) interface circuit didn't work at 3.3V, Using it as a baseline, i've simply scalled 5v related resistor values by 3.3/5 & selected nearest standard values. Seems to work with 11V, 12V and 14V states of a 12V lead acid battery.

4. Prototype testing.

Planning on prototyping on breadboard and testing on the boat.