TRMNL
trmnl
The TRMNL integration allows you to monitor your TRMNL e-paper (e-ink) displays in Home Assistant. TRMNL devices are low-power e-ink displays that show content such as calendars, weather, and custom dashboards at a glance.
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 |
What people report
TRMNL e-paper displays are monitored via the TRMNL cloud; custom content cannot be sent.
- Works2
| Device | In Home Assistant | In Apple Home | What they said | Source |
|---|---|---|---|---|
| TRMNL (OG) | Works Cloud | Monitoring and sleep schedule only; no custom contentSaved copySupported devices: TRMNL (OG); TRMNL (X). Limitations: The integration does not support sending custom content to the display. It only allows you to monitor the device status and control the sleep schedule. Excerpt saved from home-assistant.io on 2026-10-23. | Docs | |
| TRMNL (X) | Works Cloud | Monitoring and sleep schedule only; no custom contentSaved copySupported devices: TRMNL (OG); TRMNL (X). Limitations: The integration does not support sending custom content to the display. It only allows you to monitor the device status and control the sleep schedule. Excerpt saved from home-assistant.io on 2026-10-23. | Docs |
Gathered from GitHub issues, pull requests, discussions and docs, and from r/homeassistant. These are individual reports, so check the linked thread and the date before you buy.
How it connects
Cloud polling
Goes through the maker’s cloud, asking it for updates every so often. Needs the internet and an account.
Found automatically over
- DHCP
Details
| Installs (analytics) | 396 (0.06%) |
|---|---|
| Quality scale | Platinum |
| Added in | Home Assistant 2026.4 |
| Set up in the UI | Yes |
| Maintainers | @joostlek |
Devices listed in its documentation
- TRMNL (OG)
- TRMNL (X)
Limitations from the docs
- The integration does not support sending custom content to the display. It only allows you to monitor the device status and control the sleep schedule.
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.
