B ) Run in terminal
pip3 install tasmotizer
After installation start your device in flash mode. (GPIO-0 is HIGH)
Flash mode for Sonoff 4CH: Press and hold button 1 - Plug usb to your pc - Wait 3 seconds while holding the button 1
Ready for flashing.
Device will be in demo mode. Try it in demo mode and if you like it get 4 credits
Send an email to email@example.com, write your device ID, after activation restart your device.