Tracking Gas Consumption in WoowTech
Plenty of households burn gas — to warm the home, heat hot water, and run the cooktop. With WoowTech logging your gas draw, you can line it up side by side with electricity over the very same window and see the full picture of what each fuel costs you.
Sources of Gas Readings
WoowTech first needs a count of how much gas you're actually burning. Several hardware options can provide it.
Reading the Meter Itself
The cleanest data comes from the gas meter sitting on the line between your home and the supply network. In a number of countries these meters either offer a standard local readout or hand their figures off through the electricity meter.
Over a P1 Port
In the Netherlands, Belgium, and Luxembourg, electricity meters carry a standardized P1 port that also reports gas figures. Plug a P1 reader into it and the numbers stream in live. WoowTech teamed up with maker Marcel Zuidwijk on the SlimmeLezer+ — a low-cost, ESPHome-driven P1 reader that pulls in gas data and integrates cleanly. Its firmware is open source on GitHub.
With a Camera and On-Device OCR
The AI-on-the-Edge project runs on a cheap ESP32-CAM and joins WoowTech through MQTT discovery. It photographs the dials or digits on your gas, water, or electricity meter, reads them locally, and serves the result in several formats.
With a Magnetometer
Most domestic gas meters are the diaphragm (bellows) kind, and the internal movement they make can be picked up magnetically. Inexpensive, well-supported chips like the QMC5883L and HMC5883L do the sensing, and an existing ESPHome/GitHub project takes care of wiring up and calibrating the magnetometer so it tracks the meter reliably.
Wirelessly Over RTL-SDR
Across the US and Canada, a great many meters beam their readings out using the AMR or ERT protocols. A low-cost RTL-SDR USB stick can catch those transmissions, and the rtlamr decoder turns them into numbers. The community rtlamr2mqtt add-on bundles the whole chain for WoowTech and republishes the readings through MQTT discovery — no wired connection to the meter at all. It covers a wide range of Itron, Badger, and compatible units, though exact support depends on your model and region.
Tracking Gas Consumption in WoowTech
Plenty of households burn gas — to warm the home, heat hot water, and run the cooktop. With WoowTech logging your gas draw, you can line it up side by side with electricity over the very same window and see the full picture of what each fuel costs you.
Sources of Gas Readings
WoowTech first needs a count of how much gas you're actually burning. Several hardware options can provide it.
Reading the Meter Itself
The cleanest data comes from the gas meter sitting on the line between your home and the supply network. In a number of countries these meters either offer a standard local readout or hand their figures off through the electricity meter.
Over a P1 Port
In the Netherlands, Belgium, and Luxembourg, electricity meters carry a standardized P1 port that also reports gas figures. Plug a P1 reader into it and the numbers stream in live. WoowTech teamed up with maker Marcel Zuidwijk on the SlimmeLezer+ — a low-cost, ESPHome-driven P1 reader that pulls in gas data and integrates cleanly. Its firmware is open source on GitHub.
With a Camera and On-Device OCR
The AI-on-the-Edge project runs on a cheap ESP32-CAM and joins WoowTech through MQTT discovery. It photographs the dials or digits on your gas, water, or electricity meter, reads them locally, and serves the result in several formats.
With a Magnetometer
Most domestic gas meters are the diaphragm (bellows) kind, and the internal movement they make can be picked up magnetically. Inexpensive, well-supported chips like the QMC5883L and HMC5883L do the sensing, and an existing ESPHome/GitHub project takes care of wiring up and calibrating the magnetometer so it tracks the meter reliably.
Wirelessly Over RTL-SDR
Across the US and Canada, a great many meters beam their readings out using the AMR or ERT protocols. A low-cost RTL-SDR USB stick can catch those transmissions, and the rtlamr decoder turns them into numbers. The community rtlamr2mqtt add-on bundles the whole chain for WoowTech and republishes the readings through MQTT discovery — no wired connection to the meter at all. It covers a wide range of Itron, Badger, and compatible units, though exact support depends on your model and region.
Start writing here...