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Physical access control (view source)
Revision as of 23:38, 27 October 2021
, 23:38, 27 October 2021→Off the shelf
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= Hardware = | = Hardware = | ||
== Access tokens == | |||
The front door and old system uses magnetic stripe cards. | |||
The new system uses NFC tokens. As long as they have a unique ID and speak NFC they should work. | |||
== Computers == | |||
The Omni front door uses a Beagle Bone Black with battery backup present in the same box. | |||
The sudo/ccl door currently doesn't have a computer but we are working on it. | |||
== Microcontrollers == | |||
The Omni front door uses an Arduino hooked to the BBB. Jake knows more. It is powered from the BBB. | |||
The sudo/ccl door uses an ESP32 running [https://esphome.io/ ESPHome] firmware. The yml config is [https://github.com/sudoroom/esphome-omnidoor-rfid here]. It talks to an RC522 RFID module over SPI, reading every second and returns the read as the event "tag_scanned" with the NFC tag ID. It has an API service that Home Assistant can call, named "unlock_door" which turns on the GPIO pin controlling the solenoid. Changing the PWM power and amount requires re-flashing which can be done over the air (OTA). It uses a few transistors to control the 12 VDC for the solenoid. Alex made this circuit. The ESP32 board is powered from a 5 V regulator which is powered by the same 12 V as the solenoid. | |||
It is planned that the power for the ESP32 and solenoid will ultimately come from PoE with a central battery backup in the server closet which will also server as power backup for the new access control computer. | |||
== Electric strikes == | == Electric strikes == | ||
Both the Omni front door and sudo/ccl door use electric strikes. These just need 12 V and enough amps. | |||
To control the strikes from a microcontroller the Omni front door arduino uses some sort of motor controller board. Jake knows about it. | |||
== Smart locks == | == Smart locks == | ||
=== Off the shelf === | === Off the shelf === | ||
juul has been testing the August Smart Lock Pro which speaks z-wave. He wrote up a [https://gist.github.com/Juul/755ac2895a4b1ea430d5edd31abbf82f guide] on how to use it with Home Assistant. | |||
=== Custom hackery solution === | === Custom hackery solution === | ||