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Sinilink MOS Relay Board
Model reference: XY-WFMS
Sinilink MOS

Available from:
Aliexpress.com
Amazon.com
Amazon.de


Manufacturer:
Alibaba.com

Flashed with:
Serial port

GPIO #Component
GPIO00 None
GPIO01 None
GPIO02 LedLinki
GPIO03 None
GPIO04 Relay 1
GPIO05 User
GPIO09 None
GPIO10 None
GPIO12 Button 1
GPIO13 Led 1
GPIO14 None
GPIO15 None
GPIO16 None
GPIO17 None
Template for Tasmota v9.1+
{"NAME":"Sinilink MOS","GPIO":[0,0,576,0,224,1,0,0,32,288,0,0,0,0],"FLAG":0,"BASE":18}

You can use the ESP-12 module for flashing or the pin holes on the bottom of the PCB. Pin holes are too small to use Dupont cables or breadboard wires. Some stripped ethernet cable wires or sewing needles can work.

Pinout Image from beikeland