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ESP-M4 Module
Model reference: ESP-M4
ESP-M4

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

Manufacturer:
Github.com

Install method:
USB to Serial

GPIO #Component
GPIO00 User
GPIO01 User
GPIO02 None
GPIO03 User
GPIO04 User
GPIO05 User
GPIO09 None
GPIO10 None
GPIO12 User
GPIO13 User
GPIO14 User
GPIO15 User
GPIO16 User
GPIO17 None
Configuration
{"NAME":"ESP-M4","GPIO":[1,1,0,1,1,1,0,0,1,1,1,1,1,0],"FLAG":0,"BASE":18}

Pinout

Datasheet

Blue PCB versions and modules labelled “WIFI+ by DOITING” have a different pinout:

Pinout 2