WOFEA V10 Hack

Objective

WOFEA V10 Wifi is a chinese low cost alarm system based on ESP8266. Objective of this project is to create a custom and open source firmware based on esphome and Home Assistant !

Hardware

• WOFEA V10 Base:
  • ESP8266 4M
  • 433Mhz RF transmiter & receiver
  • 2 status Leds
  • Audio ouput & HP
  • Internal Siren 5V output
  • Battery pin
• PIR & contact sensor :
  • 433Mhz transmiter with unique code
  • Detection = send 10 frame of 24bits
  • PIR pulse lenght : 385 us
  • Contact sensor pulse lenght : 433 us
• External siren :
  • 433Mhz receiver only
  • 3 codes : arm, disarm, siren
• Remote control :
  • 433Mhz transmiter
  • 4 codes : arm, disarm, siren, ?
  • pulse lenght : 325 us

Internal ESP8266 Pin

• GPIO5 : RF receiver
• GPIO4 : RF transmiter
• GPIO0 : Status led 2 (RED)
• GPIO2 & GPIO15 : Status led 1 (RED/BLUE)
• GPIO3 : Siren ouput
• GPIO16 : Reset button
• GPIO14, GPIO12, GPIO13 : Audio output (probably I2S protocol or pwm audio)

Wofea board :

Extract original firmware

• Solder serial connector (see picture)
• Connect GND on IO0 (boot loader mode)
• Turn device on (with usb power)
• Run :

  esptool read_flash 0x00000 0x400000 firmware.bin

• Dont use crappy usb to serial like Prolific PL2303HX

Flash ESPHOME firmware

• Solder serial connector (see picture)
• Connect GND on IO0 (boot loader mode)
• Turn device on (with usb power)
• Run :

  esphome alarm.yaml run

• Add to Home assitant
• Enjoy

Current ESPHOME support

• Status leds
• Reset button
• Siren ouput
• RF receiver
• RF transmiter
  • Chip is CMT2110A (HopeRf or cmostek)
• Support alarm automation
• SMS Alert
• RF jamming detection
• Support audio output

Add backup battery

• Pin charge is ~4.66v
• Find compatible battery : TODO

Install Home Assitant on OrangePi lite

• Download Debian image : https://www.armbian.com/orange-pi-lite/
• Write on SD card
• Default password is root / 1234

# Configure Wifi
armbian-config

# Install missing packets
apt-get install jq avahi-daemon dbus apparmor-utils

# Install Docker-CE
curl -sSL https://get.docker.com | sh

# Install Hass.io (H3 is equivalent to RPI2)
curl -sL https://raw.githubusercontent.com/home-assistant/hassio-build/master/install/hassio_install | bash -s -- -m raspberrypi2

# Protect sd card
vi /etc/fstab
# add : commit=5,data=journal

# Open url : http://orangepilite:8123