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Sinilink DC5V Module Relay Board
Model reference: XY-WF5V
Sinilink DC5V Module

Available from:
Aliexpress.com
Banggood.com
Amazon.com


Manufacturer:
Alibaba.com

Install method:
USB to Serial

GPIO #Component
GPIO00 None
GPIO01 None
GPIO02 None
GPIO03 None
GPIO04 Relay1
GPIO05 User
GPIO09 None
GPIO10 None
GPIO12 Button1
GPIO13 Led1
GPIO14 None
GPIO15 None
GPIO16 User
FLAG None
Configuration (old version)
{"NAME":"Sinilink XY-WF5V","GPIO":[0,0,0,0,21,255,0,0,17,52,0,0,255],"FLAG":0,"BASE":18}

pinout

See Sinilink XY-WFUSB for flashing notes.