The keypad reader, adding a PIN pad for two-factor entry or code-only doors, with the same OSDP Secure Channel credential support.
Selora does not recommend this device
Alarm.com access control hardware is licensed to an Alarm.com for Business account. The controllers are standard HID Aero and Mercury boards, but as sold their configuration and credential database live in Alarm.com's cloud, with no local API for Home Assistant.
This is the most reversible lock-in in the range, which is worth knowing. HID Aero and Mercury are open controller platforms that many access control vendors build on, so the panels, readers and wiring are not wasted if a client later changes software. What is bought from Alarm.com is the licence and the cloud, not the boards. For an install that needs door state and unlock events in Home Assistant, choose an access platform with a local API or an on-premise controller, and keep the same Mercury or Aero hardware underneath it.
- An access control platform with a documented local API, running on the same Mercury or HID Aero hardware
- Ubiquiti
- For a single door in a home, a Z-Wave or Matter lock Home Assistant drives directly
The ET20 with a keypad, for doors that need a PIN as a second factor alongside a card or phone, or that run on codes alone for occasional users.
Read ranges are about 1.2 inches for DESFire EV1, 2.2 inches for EV2 and up to 4 inches for 125kHz proximity, and it is rated from -31F to 151F, so it suits an exterior door.
At 5.1 by 3.3 by 0.7 inches it needs more room than the other two; check the frame before specifying it.
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