Hi all, i have had a similar system last year (openEVSE + ESP-12 with RAPI) and i can confirm it work great. Since i developed my own evse with native MQTT i moved in a different direction.
If any of you are actively developing MQTT integration in a EVSE please consider my node-red implementation to automatically control the charge of the car here-> Diverting Solar to Charge an Electric Car - #45 by cab123
If you don’t agree with the implementation let me know i think we can make that part almost “plug and play”. We just need to agree on the messages sent to to the MQTT broker to drive the Node-Red logic correctly.