OCPP 1.6j implementation to EV charger

We currently designed a fully functional EV charger in which now we have to implement OCPP 1.6j library. The PCB have an ESP32. We are currently developing a mobile APP to control the charger via OCPP. Bluetooth and WiFi for handshake.
We will test OCPP compliance with Open Charge Alliance tool, infrastructure for wifi and bluetooth is re