OCPP-J 1.6 client for embedded microcontrollers. Portable C/C++. Compatible with Espressif, NXP, Texas Instruments and STM.

Reference usage: OpenEVSE

PlatformIO package: ArduinoOcpp

Website: www.arduino-ocpp.com

Fully integrated into the Arduino platform and the ESP32 / ESP8266. Runs on ESP-IDF, FreeRTOS and generic embedded C/C++ platforms.

This library allows your EVSE to communicate with an OCPP Backend and to participate in commercial charging networks. You can integrate it into an existing firmware development, or start a new EVSE project from scratch with it.

✔️ Works with SteVe and 15+ commercial Central Systems

✔️ Tested in many charging stations

✔️ Eligible for public chargers (Eichrecht-compliant)

Try it (no hardware required): ArduinoOcppSimulator

• handles the OCPP communication with the charging network
• implements the standard OCPP charging process
• provides an API for the integration of the hardware modules of your EVSE
• works with any TLS implementation and WebSocket library. E.g.
  • Arduino networking stack: Links2004/arduinoWebSockets, or
  • generic embedded systems: Mongoose Networking Library

For simple chargers, the necessary hardware and internet integration is usually far below 1000 LOCs.

Please take examples/ESP/main.cpp as the starting point for your first project. It is a minimal example which shows how to establish an OCPP connection and how to start and stop charging sessions. The API documentation can be found in ArduinoOcpp.h.

Mandatory:

• bblanchon/ArduinoJSON (please upgrade to version 6.19.1)

If compiled with the Arduino integration:

• Links2004/arduinoWebSockets (please upgrade to version 2.3.6)

In case you use PlatformIO, you can copy all dependencies from platformio.ini into your own configuration file. Alternatively, you can install the full library with dependencies by adding matth-x/ArduinoOcpp in the PIO library manager.

• reach full compliance to OCPP 1.6 Smart Charging Profile
• integrate Authorization Cache
• get ready for OCPP 2.0.1 and ISO 15118

I hope this guide can help you to successfully integrate an OCPP controller into your EVSE. If something needs clarification or if you have a question, please send me a message.

✉️ : matthias A⊤ arduino-ocpp DО⊤ com

If you want professional assistance for your EVSE project, you can contact me as well. I'm looking forward to hearing about your ideas!