| Feature | Model | Comment |
|---|---|---|
| Microcontroller | ESP32-WROOM-32E | |
| Storage | 16MB | Wear levelling consideration, 1.9MB app storage & 190kb SPIFFS for access control log - updatable via OTA |
| Communication | BLE 4.2 & WiFi 2.4Ghz | |
| Audio | Piezo speaker | |
| Visual | Blue & green LED | Red LED is present, but wonkey |
| RFID | NXP MFRC522 13.56MHZ | |
| RTC | MCP7940 | |
| Sensor | SHTC3 Temperature & Humidity | |
| Ports | Micro USB | |
| IO | 5V output, GND, 2 pins from ESP32 (IO33, IO26), HS (12V / Input Voltage), LS (ground toggle), + / - | |
| Dimensions | 73mm x 64mm x 9mm | Pins are not soldered on |
| Power | All features: 8 - 12V via Pins (+ / -) Low Power Mode: 5V via USB |
|
| I2C Address | 0x6F - RTC MCP7940 Functions 0x57 - RTC MCP7940 ROM 0x60 - LED Driver 0x70 - SHTC3 Sensor |