ESP-M3
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Made by Shenzhen DOIT
Resources
Notes
There is some confusion, ATM, about pin 3 of this module. All of the documentation from Shenzen DoIT shows this pin as GPIO13 of the ESP chip. Some actual modules have it listed on the silkscreen as GPIO12.
Further testing and research will be needed to prove which it actually is.
(hhhmmm... this actually explains the error in my ESP-M3 Everything! board. testing may be quicker than expected.)