Use the correct pack voltage and rearrange SOC/SOH so maybe H.A. will
show SOC by default.

An MQTT mismatch and a foreground bug.

This program reads various bits of data from the internal CAN bus of
EndurEnergy ESP-5100 batteries and publishes them over MQTT. Most of
the internal CAN protocol has been reverse engineered, though notably,
faults and warnings are as-yet mostly opaque and so not sent.