Q & A

This page will grow with questions from the mailing list and topics that come up regularly in our EVerest development life. It is always a good idea to have a look here when running into problems before asking for help via the mailing list.

Errors, warnings and Troubleshooting

Compiling with GNU compilers

Building EVerest, you might want to use a GNU compiler. Handing over the flag CMAKE_CXX_COMPILER to cmake lets you do that.

However, when using gcc, you might get errors about some unreferenced symbols or linking issues.

Solution is simple: Use g++ instead:

cmake -D CMAKE_CXX_COMPILER=g++

g++ will link std C++ files automatically (besides others) which gcc won’t do.

EVerest OCPP 2.0.1 setup

After successfully setting up EVerest and configuring the OCPP201 module, I get errors about a failed websocket connection.

The OCPP module of EVerest operates - for now - as an OCPP client. You will need to choose a backend system capable of OCPP 2.0.1 (like SteVe for OCPP 1.6).

You may want to have a look at https://github.com/mobilityhouse/ocpp and implement message handlers to get the communication working. Or you can have a look at https://github.com/thoughtworks/maeve-csms. Note: This has not been officially tested by us.