Battery concentrator (function 30)

A whole battery bank reported as one device, rather than one topic per module. It carries the same readings as a single battery — state, charge request, voltage, current, state of charge, temperature and the charge/discharge limits — plus which bank it is, propulsion or accessory.

Published only (no commands). All frames expireAfterSec: 30.

• state enum: ok, warning, alarm.
• request enum: no-charge, mid-load, overload, low-battery, off.
• battery enum: propulsion, accessory.

Published

device/30/<i>/life

metadata adds counter.

data field	Type	Unit	Description
state / stateCode	string / int	—	State (enum)
request / requestCode	string / int	—	Charge request (enum)
voltage	number (1 dec)	V	Voltage
current	number (1 dec)	A	Current
soc	int	%	State of charge
temperature	int	°C	Temperature
battery	string	—	Battery type (enum, no Code)

{
  "data": {
    "state": "ok",
    "stateCode": 0,
    "request": "mid-load",
    "requestCode": 1,
    "voltage": 51.2,
    "current": 40.5,
    "soc": 85,
    "temperature": 25,
    "battery": "propulsion"
  },
  "metadata": {
    "rxdate": "2026-06-17T14:30:45.123Z",
    "rxTimestamp": 1781793045,
    "expireAfterSec": 30,
    "counter": 3
  }
}

device/30/<i>/state

data field	Type	Unit	Description
maxChargeVoltage	number (1 dec)	V	Max charge voltage
maxChargeCurrent	number (1 dec)	A	Max charge current
maxDischargeCurrent	number (1 dec)	A	Max discharge current
minDischargeVoltage	number (1 dec)	V	Min discharge voltage

{
  "data": {
    "maxChargeVoltage": 58.4,
    "maxChargeCurrent": 100.0,
    "maxDischargeCurrent": 150.0,
    "minDischargeVoltage": 42.0
  },
  "metadata": {
    "rxdate": "2026-06-17T14:30:45.123Z",
    "rxTimestamp": 1781793045,
    "expireAfterSec": 30
  }
}

mosquitto_sub -h 127.0.0.1 -t 'device/30/+/#' -v