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ESP-01S 5V Relay Module V1.0 Relay Board
Model reference: ESP-01S-Relay-v1.0
ESP-01S 5V Relay Module V1.0

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


Manufacturer:
Github.com

Install method:
USB to Serial

GPIO #Component
GPIO00 Relay1i
GPIO01 Led1
GPIO02 User
GPIO03 User
GPIO04 None
GPIO05 None
GPIO09 None
GPIO10 None
GPIO12 None
GPIO13 None
GPIO14 None
GPIO15 None
GPIO16 None
FLAG None
Configuration (old version)
{"NAME":"ESP-01S Relay","GPIO":[29,52,255,255,0,0,0,0,0,0,0,0,0],"FLAG":0,"BASE":18}

How to flash ESP-01(S)