P1MeterKit is a compact smart meter sensor designed to monitor your electricity and gas consumption in real-time. It integrates seamlessly with Home Assistant via ESPHome and runs fully local (no cloud required).
The P1MeterKit connects directly to the P1 port of your DSMR smart meter using an RJ12 cable. It reads the DSMR telegrams and exposes real-time energy data to Home Assistant. Compatible with DSMR/SMR v4 and v5 smart meters.
👉 Check compatibility for your smart meter: https://p1meterkit.nl/en
- Energy monitoring: Real-time electricity consumption and production tracking (3-phase support).
- Gas monitoring: Gas consumption via MBus connection.
- Environment sensing: Temperature and humidity measurement.
- Connectivity: Wi-Fi with captive portal fallback, Improv BLE/Serial.
- Local only: Works without cloud services (100% local); OTA supported via manifest on GitHub Pages.
We publish firmware variants for two hardware versions. Each variant is a dedicated YAML in the version folder and ships with a matching Web Tools manifest on the gh-pages branch.
| Hardware | Variant | Description |
|---|---|---|
| V1 (ESP8266) | WiFi | Standard WiFi connectivity |
| V2 (ESP32-C3) | WiFi | WiFi with Improv BLE/Serial and OTA updates |
- Hardware: Connect the P1MeterKit to your smart meter using the included RJ12 cable.
- Flash firmware:
- Use our web-based flash tool at https://smarthomeshop.io/en/firmware to flash or re-flash your kit.
- Or compile/flash locally with ESPHome CLI.
- Onboarding:
- Connect to the
p1meterkithotspot if WiFi is not configured. - V2: Use Improv BLE or Improv Serial for provisioning.
- Connect to the
Please check for full documentation our quick start guide: https://smarthomeshop.io/quick-start-p1meterkit
p1meterkit-v1/— ESPHome configurations for V1 (ESP8266)p1meterkit-v2/— ESPHome configurations for V2 (ESP32-C3).github/workflows/— CI to build and publish artifacts/manifests togh-pagesgh-pagesbranch — public firmware and manifests (for OTA and ESP Web Tools)
| Sensor | Description |
|---|---|
| Energy Consumed Tariff 1/2 | Total energy consumed per tariff (kWh) |
| Energy Produced Tariff 1/2 | Total energy produced per tariff (kWh) |
| Power Consumed | Current power consumption (kW) |
| Power Produced | Current power production (kW) |
| Voltage Phase 1/2/3 | Voltage per phase (V) |
| Current Phase 1/2/3 | Current per phase (A) |
| Gas Consumed | Total gas consumption (m³) |
| Temperature | Environment temperature (°C) |
| Humidity | Environment humidity (%) |
| WiFi Signal | WiFi signal strength |
PRs and issues are welcome. Please keep changes modular and follow ESPHome best practices.
- Product info and guides: https://p1meterkit.nl/en
- Store: https://smarthomeshop.io
- Community & support (Discord): https://smarthomeshop.io/discord
This project is released under the CC BY‑NC 4.0 license