RFID Card Reader and Door Relay Opening Module for use with the doorbot project.
It's general operation is:
- Setup Wi-Fi Connection*
- Setup MFRC522 Card Connection
- Loop waiting for card presence detection
- On Card Detect, Grab the UID from the presented Card
- Attempt to trigger an 'open' action* on the door identified by the onboard device_id, using the same device id and the UID from the presented card as the Username and Password for HTTP Basic Auth
- If 200 response; flash green on RGB LED and unlock door via relay for 5 seconds
- Otherwise flash red for 5 seconds and resume loop
*Configured through build-time environment variables, see platform.ini for details
This project uses an ESP-WROOM-32 package, an RC522 RFID module
| RC522 | ESP32 | Description |
|---|---|---|
| 3v3 | 3v3 | VIN |
| RST | D22 | Reset |
| GND | GND | Ground |
| IRQ | Unused | |
| MISO | D19 | SPI Master Input |
| MOSI | D23 | SPI Master Output |
| SCK | D18 | SPI Clock |
| SDA | D21 | Serial Data Line |
| RGB LED | ESP32 | Description |
|---|---|---|
| (-) | GND | Ground |
| R | D2 | Red |
| G | D4 | Green |
| B | Blue |
| RELAY | ESP32 | |
|---|---|---|
| NO | D15 | Normally Open (Actuator) |
| + | 3v3 | +VE |
| - | GND | Ground |