Obi Socket - RTurala/Sonoff-Tasmota GitHub Wiki
Connection
Vcc - 3,3V
TX - RX
RX - TX
GND - GND
Connect GPIO0 to GND before connecting power to enable flash mode!
Additional Information
A low pulse on GPIO12 switches the relay on, a low pulse on GPIO5 switches it off.
I have solved the 'pulse issue' by setting GPIO12 to always 0 (as LED) and works fine.
More Infos can be found here: #1988.
Initial Configuration
In the default configuration GPIO0 (which is also used to enable flash-mode) is setup as a Button.
To enable AP-Mode and setup the correct GPIOs as described below,
You can short GPIO0 to GND 4 times as if it was a button (see Button-usage)
Using this method allows you to flash a precompiled binary
Device Images
(images from https://github.com/martin-ger/ESP8266-WiFi-Socket)