Open Source • Local • ESPHome

Monitor Your Water & Energy
Without the Cloud

S0tool turns any pulse-based meter into a smart sensor — 100% local, open source, Home Assistant ready.

Why S0tool?

Real-Time Monitoring

Track water and energy live — no delays, no cloud.

Smart Integration

Transform any pulse-based meter into a smart sensor.

Energy Optimization

Feeds directly into the Home Assistant Energy Dashboard.

100% Local & Private

No cloud, no subscriptions. Your data stays on your network.

By the Numbers

20+
Compatible Meters
100%
ESPHome Ready
100%
HA Ready
100%
Local
100%
Open Source
24/7
Monitoring

Compatibility

BrandModelTypeStatusRegion
ElsterV200💧 WaterCompatibleNL
ItronAquadis+💧 WaterCompatibleNL
Sensus620💧 WaterCompatibleNL
MaddalenaCD SD Plus💧 WaterCompatibleBE
ActarisSingle-Jet💧 WaterCompatibleNL
ZennerMNK-RP-N💧 WaterCompatibleDE
KamstrupMultical 21💧 WaterCompatibleEU
DiehlHydrus💧 WaterCompatibleEU
EastronSDM120 / SDM220⚡ kWhCompatibleEU
ABBB23 / B24 series⚡ kWhCompatibleEU
SchneideriEM3000 series⚡ kWhCompatibleEU
Carlo GavazziEM24 / EM340⚡ kWhCompatibleEU
Finder7E.23 / 7E.36⚡ kWhCompatibleEU
EltakoDSZ15D-3x80A⚡ kWhCompatibleEU

Your meter not listed? Add it via Community →

BrandModelTypeStatusRegionNotes
ElsterV200💧 WaterCompatibleNL
ItronAquadis+💧 WaterCompatibleNL
Sensus620💧 WaterCompatibleNL
MaddalenaCD SD Plus💧 WaterCompatibleBE
ActarisSingle-Jet💧 WaterCompatibleNL
ZennerMNK-RP-N💧 WaterCompatibleDE
KamstrupMultical 21💧 WaterCompatibleEU
DiehlHydrus💧 WaterCompatibleEU

Your meter not listed? Add it via Community →

BrandModelTypeStatusRegionNotes
EastronSDM120 / SDM220⚡ kWhCompatibleEUS0 pulse terminals
ABBB23 / B24 series⚡ kWhCompatibleEUExternal S0 wiring required
SchneideriEM3000 series⚡ kWhCompatibleEUNeeds S0 connection setup
Carlo GavazziEM24 / EM340⚡ kWhCompatibleEUPulse settings configurable
Finder7E.23 / 7E.36⚡ kWhCompatibleEUDIN rail mountable
EltakoDSZ15D-3x80A⚡ kWhCompatibleEUDIN rail mountable

Your meter not listed? Add it via Community →

Made for ESPHome

Official Made for ESPHome

S0tool carries an official Made for ESPHome license — guaranteeing seamless integration.

Get in Touch

Questions, bugs, or ideas?

Email Us Discord (NL/EN) Community