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David Pye edited this page Oct 12, 2016 · 5 revisions

Welcome to the RFID access controller wiki!

This page describes the hardware and software used at Makerspace as part of the Space's access control system. We use it to control both access to the space itself (where it operates a door with an electromagnetic latch) and for access control for expensive or dangerous hardware.

Concept:

  • Board is based around the ESP8266 WiFi-enabled microcontroller (ESP-12 model)
  • Designed to run from 5V DC (with onboard step-down linear regulator to provide 3v3)
  • Uses MiFare RC-522 RFID reader board
  • Controls device either via external relay with 5v coil or directly (onboard FET can switch 3 amps at 5VDC)

Software supports:

  • Logging access/failed access via URL
  • Can download list of valid users over HTTP and cache in flash, so still operates after WiFi/power failure.
  • Status LED (WS2812B or similar) to give visual feedback to users
  • Can announce access via MQTT if desired
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