Sensors
Alfen Modbus
ThaStealth/alfen_modbus · v0.3.0
HACSLocal polling
Alfen Modbus Component for HomeAssistant
In Apple Home through HomeKit Bridge
What HomeKit Bridge makes of each kind of entity this integration creates, read from its source code. A device only gets the ones that apply to it.
| Entity | Shows up as | Note |
|---|---|---|
switch | Switch or outlet | |
binary_sensor | Sensor (motion, contact, leak, smoke…) | |
sensor | Sensor (temperature, humidity, air quality…) | |
select | Mode picker (as switches) |
How it connects
Local polling
Talks to the device on your network, asking it for updates every so often.
Details
| Installs (analytics) | 193 (0.03%) |
|---|---|
| GitHub stars | 24 |
| Latest version | 0.3.0 (2026-10-22) |
| Set up in the UI | Yes |
| Maintainers | @ThaStealth, @straybiker |
| License | Apache-2.0 |
Limitations from the README
- Power budget may reset to 0A when no car is connected (fixed in NG9xx firmware 6.4.0-4210). The integration raises a repair notification in Settings → Repairs if it detects an NG9xx charger on older firmware.
- Reallin power meter (post-2021): Chargers with a Reallin power meter produced after 2021 only export a subset of measurement values. Per-phase energy, apparent energy, and reactive energy sensors will show as "unavailable" (NaN). This is a hardware limitation, not a bug.
- AHP platform, integration < v0.2.1: all entities stay unavailable because a single oversized Modbus read fails on every poll cycle. Update to v0.2.1 or newer (#40).
- Breaking change: the Phase Mode select's options changed from "1 Phase"/"3 Phases" to the literal values "1"/"3" (needed for EVCC compatibility). Update any automation, script, or dashboard that matches on the old option text.
In ReReHome
Whatever HomeKit Bridge shares reaches Apple Home as normal HomeKit accessories behind your Home Assistant bridge, so ReReHome shows and controls them like any other.
Bridges get their own settings page listing the accessories behind them.
Sources
- Documentation: https://github.com/ThaStealth/alfen_modbus
- Source code: https://github.com/ThaStealth/alfen_modbus
- Issues: https://github.com/ThaStealth/alfen_modbus/issues
- HACS: https://hacs.xyz
