Doorman HomeKit System

System of a doorbell and smart lock integration into Apple HomeKit. The project platform is ESP8266 - WeMos D1 Mini. Target door phone system is Fermax.

The SW part of the project is based on https://github.com/maximkulkin/esp-homekit-demo and https://github.com/pfalcon/esp-open-sdk.

Fermax phone interconnection

Fermax phone signals:

• RingDet - ringing detector
  • 3 - common (- on PCB)
  • 4 - call (+ on PCB)
• Lock - door lock control
  • 1 - door opener and microphone supply (+ on PCB)
  • 3 - common (+ on PCB)

Initial configuration

The initial configuration could be modified in the file config.h.

HomeKit Access Parameters

• HOMEKIT_PASSWORD - "111-00-111"
• HOMEKIT_SETUP_ID - "1QJ9"

System Parameters

• The GPIO pin that is connected to a relay - WeMos D1 Mini - Pin D1
• The GPIO pin that is connected to a LED - WeMos D1 Mini - Pin D4 (Internal Blue LED)
• The GPIO pin that is connected to a button - WeMos D1 Mini - Pin D3
  • Button for door open or factory reset
• The GPIO pin that is connected to a door bell - WeMos D1 Mini - Pin D2
  • Door bell detection - iOS notify as moving
• Timeout in seconds to open lock for - 5 seconds
• Button timeout for log press - 10000 ms (factory reset)
  • Shorter press = open the door
• Doorbell notify timeout - 3000 ms
  • After this timeout system disarm the door bell notification

PCB Design

PCB is designed for using in DIN rail box Z103J ABS V0 KRADEX with AC/DC power supply MEAN WELL DR-15-5. The system can be powered only by 5V DC!!!

Compilation and deployment

All binary files are in bin directory.

Flash process

esptool.py write_flash -fs 1MB -fm dout -ff 40m 0x0 rboot.bin 0x1000 blank_config.bin 0x2000 doorman.bin

• rboot.bin - boot loader
• blank_config.bin - blank config partition
• doorman.bin - firmware