EmonPi 3 B+ how to add wifi wemos d1 mini esp8266 and pull feeds

Yes, but how is that being done?

[edit] I realised it is the BMS from this discussion. DIY Lithium Battery Balancer and monitoring (BMS) - #723 by stuart

@stuart can you confirm how your BMS communicates (MQTT?) and what might be needed to set that up?