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ESP-12F 5V/7-30V/220V 4 Channel Relay Board
Model reference: ESP12F_Relay_X4
ESP-12F 5V/7-30V/220V 4 Channel

Available from:
Aliexpress.com
Banggood.com





Install method:
USB to Serial

GPIO #Component
GPIO00 User
GPIO01 User
GPIO02 Led_i 1
GPIO03 User
GPIO04 User
GPIO05 Led_i 2
GPIO09 User
GPIO10 User
GPIO12 Relay 3
GPIO13 Relay 4
GPIO14 Relay 2
GPIO15 User
GPIO16 Relay 1
GPIO17 User
Template
{"NAME":"ESP12F_Relay_X4","GPIO":[1,1,320,1,1,321,1,1,226,227,225,1,224,1],"FLAG":0,"BASE":18}

Headers must be soldered and jumpers needs to be installed for enabling relays.

The board uses GPIO16 and so Relay1 is always turned ON when power is applied to the board, causing a brief on/off pulse on the relay as Tasmota loads and turns it off again. Of course, if the last state was ON, then it will stay ON. It’s still a very useful board at a bargain price; just a shame the designer was too lazy to route a different GPIO pin. (Although rather than using the provided link pair, you could link to IO0 IO2 or IO15 thru-holes on the side of the board instead of IO16, and change the template to suite.)

Example for when Relay1 is connected to GPIO15: ESP12F Relay X4 board with Relay1 connected to GPIO15

Suitable template:

{"NAME":"ESP12F_Relay_X4","GPIO":[1,1,1,1,1,320,1,1,226,227,225,224,1,1],"FLAG":0,"BASE":18}

Instructions