Hello, I'm a developer looking to write a custom frontend to talk for my 150V/100A MPPT Solar charge controller, hopefully via bluetooth. I'm wondering if either any (Java?) APIs are available already to talk to the controller, or if there are specifications/serial protocols available for how to talk to the controller via bluetooth.
I'm looking to develop a Java-based REST service that will give current and historical metrics to a web UI via JSON. If there's a product/bridge that already offers something similar, that would be sufficient.