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Alarm.com

ADC-AC-ET10

Not recommended

The slim mullion-mount reader in the Alarm.com access range, reading proximity, DESFire, NFC and Bluetooth over OSDP Secure Channel.

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.

Install instead
  • 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
Alarm.com Access Control: partner installation documentation
Protocols

The narrow reader, sized for a door frame mullion where a single-gang plate will not fit. It reads 125kHz proximity, MIFARE DESFire at 13.56MHz, NFC, and Bluetooth for phone credentials.

It is fully OSDP compliant and SIA verified for OSDP Secure Channel, which matters more than it sounds: OSDP Secure Channel encrypts the reader-to-controller link, where the Wiegand wiring it replaces was plaintext and trivially cloned at the reader.

Because it speaks standard OSDP, the reader itself is not the locked-in part. It will talk to any controller that speaks OSDP, which is most of them.

Hardware availability

Alarm.com hardware is sold and provisioned through authorized dealers, and the video, access control and business products also need the matching Alarm.com service plan on top of the hardware. The Z-Wave devices are the exception: they carry no service dependency once they are out of the panel’s network, and they turn up on the resale market at a fraction of dealer pricing.

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