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Current divider
0-1KΩ linear carbon potentiometer
while SIM800L V
It can interact with buttons
SONOFF 4 Channel R3 soldering Current dividerSONOFF 4CHR3 is a 4 gang Wi Fi Smart Switches designed to give you the ability to integrate smart control into your existing home to enable a smart home. The smart switch has 4 gangs that can be used to control lights and other home appliances at the same time in four areas of your home. The new improvement on 4CHR3 and 4CHPROR3 compared with 4CHPR2 and 4CHPROR2 is for users to set these 3 working modes on eWeLink APP instead of the hardware itself,
