IO2 pin on sonoff 4CH

[mysch...@gmail.com]

Hello team,

does anyone know if the IO2 (available on the 5 pin programming header) is avalable to use a IO port to e.g. hookup a DS18b20 ?

Thank you.

[ba...@bbbits.com]

If it's the one with schematic https://www.itead.cc/wiki/images/d/d3/Sonoff_4CH.SCHMATIC.pdf

then go for it.

just note that gpio2 is part of the boot mode pins and needs to be pulled high

for for normal boot. the pullup for the ds18b20 is fine.

it's unlikely the ds18b20  would pull it low during pwr on .

[George Ioakimedes]

I have a 4ch pro and i use gpio1 for ws2812b leds and i also use i2c for a bme280 sensor