I am pretty new to the OpenEvse. Does OpenEVSE send responses on its own?
Does EVSE send a message to the serial port when the EVSE boots up, or anything changes, and etc?
Or do I have to send (GET) commands to the EVSE through the serial port to know whether it boots up or anything changes?
OpenEVSE does send asynchronous (one way) messages when the status changes.
The Serial API is documented in the source code here: