Sonoff Dual R2 additional GPIO

Hardware DIY
1

Hi
i would like to read 2 switches with an existing Sonoff dual. i just need the signal of the switches, i won’t control the sonoff dual with the switches, is need the signal for other thing, but i want to avoid adding another wemosd1 or other thing just to get these 2 signals.
any idea if the sonoff dual can do this?
br dave

2

Slow down and please explain :slight_smile:

from what i can tell you want to use free GPIOs of the sonoff ? to read a state of two switches , not related to the sonoff?

3

Hi
sorry for the late reply.
yes this is what i want to do. is this possible?

4
  1. install/flash https://github.com/arendst/Sonoff-Tasmota/wiki
  2. read this https://github.com/arendst/Sonoff-Tasmota/wiki/Buttons-and-Switches

you need the part called switchmode
it will help you give a new topic to each switch

i never had a sonoff dual so cant tell you how exactly but this is the path i will take
good luck…

5

do you know if there is a plan where to solder gpio4 and 14?

6

i m still struggling in reading the two separate switches with the Sonoff Dual R2.
nobody here who has an idea how to go on?

7

Have a look at GitHub - arendst/Tasmota: Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at

Maybe share some details on what exactly you are doing and what exactly doesn’t work? Is your code available somewhere?