Watermaker (function 20)

A reverse-osmosis desalinator. It reports whether it is producing, rinsing, cleaning or stopped, how much water it has made and how salty it is, and the pressures, pumps and valves behind that. Commands select the mode and step the production flow up or down.

• state enum: standby, production, rinçage, nettoyage FAS, nettoyage membrane, defaut, arrêt d'urgence.

Published

device/20/<i>/life

metadata adds counter; expireAfterSec: 30.

data field	Type	Unit	Description
counter	int	—	Frame counter (also in metadata)
salinity	int	—	Salinity (raw)
productionFlow	int	—	Production flow (raw)
state / stateCode	string / int	—	Watermaker state (enum)
ProductLiterCmpt	int	L	Produced-liters counter
FlowNowRateFromMaxFlow	int	%	Flow as % of max

{
  "data": {
    "counter": 3,
    "salinity": 320,
    "productionFlow": 45,
    "state": "production",
    "stateCode": 1,
    "ProductLiterCmpt": 1250,
    "FlowNowRateFromMaxFlow": 80
  },
  "metadata": {
    "rxdate": "2026-06-17T14:30:45.123Z",
    "rxTimestamp": 1781793045,
    "expireAfterSec": 30,
    "counter": 3
  }
}

device/20/<i>/state

expireAfterSec: 30. Valve/pump state flags are emitted as 0/1 integers.

data field	Type	Unit	Description
preFilterPressure	number (0 dec)	bar	Pre-filter pressure
postFilterPressure	number (0 dec)	bar	Post-filter pressure
highPressure	number (0 dec)	bar	High pressure
rinsingValveSte	int (0/1)	—	Rinsing valve
productionValveSte	int (0/1)	—	Production valve
lpPumpSte / lpPumpFuseSte	int (0/1)	—	LP pump / fuse
hpPumpSte / hpPumpFuseSte	int (0/1)	—	HP pump / fuse
sensorLoopSte	int (0/1)	—	Sensor loop
hourMeter	int	—	Hour meter

{
  "data": {
    "preFilterPressure": 2,
    "postFilterPressure": 1,
    "highPressure": 55,
    "rinsingValveSte": 0,
    "productionValveSte": 1,
    "lpPumpSte": 1,
    "lpPumpFuseSte": 1,
    "hpPumpSte": 1,
    "hpPumpFuseSte": 1,
    "sensorLoopSte": 1,
    "hourMeter": 1024
  },
  "metadata": {
    "rxdate": "2026-06-17T14:30:45.123Z",
    "rxTimestamp": 1781793045,
    "expireAfterSec": 30
  }
}

mosquitto_sub -h 127.0.0.1 -t 'device/20/+/#' -v

Command — device/20/<i>/command

Regex ^device/20/([[:digit:]]+)/command$. The first matching flag set to true selects the mode; default is standby (off).

Field	Type	Description
off	bool	Standby
rinsing	bool	Rinsing
produce	bool	Production
productionFlowUp	bool	Increase production flow
productionFlowDown	bool	Decrease production flow

mosquitto_pub -h 127.0.0.1 -t 'device/20/0/command' -m '{"produce":true}'
mosquitto_pub -h 127.0.0.1 -t 'device/20/0/command' -m '{"rinsing":true}'
mosquitto_pub -h 127.0.0.1 -t 'device/20/0/command' -m '{"off":true}'