Simple implementation of the OCPP - MQTT bridge

Enables to send mqtt commands (and receive mqtt messages as responses and status updates, though not implemented right now). I use this bridge for managing charge station from OpenHAB.

Send mqtt commands to /ocpp/cmd

Poetry is used to manage dependencies.

To start program: poetry run python ./central_system.py

For automation needs I implemented these commands:

• start (start charging)
• stop
• trigger
• profile [arg] ( set charging profile, in my implementation argument is max current in Amps, message e.g. profile 8)
• configuration (read local CP configuration)
• change_configuration (set local CP configuration item)
• exit (stop bridge)

Note: to provide secrets, you need to place .env file in the directory: MQTT_USERNAME=xxx MQTT_PASSWORD=xxx LISTEN_ADDR=0.0.0.0 TAG_ID=xxx

Note: check specific dependencies if implemented without poetry, as latest versions of some packages break functionalities.

Note: Every charge station may have peculiarities of OCPP implementation. The code is tested and fully works with:

• Elinta Charge https://elintacharge.com/product/private-ev-charging-station-homebox-slim/

Dependencies and Contributions

OCPP implementation: https://github.com/mobilityhouse/ocpp