Solving Pinout Problems with a simple Blink Test with CJMCU Microcontroller.
Running a simple blink test and checking all pins and according int variables for arduino programming
Pinout for the CJMCU (source: www)
When uploading firmware I always had problems and it didn't work properly
As the board is tiny and handy for small sewing projects I wanted to know whats wrong, so this is a short pinout check with power supply from USB and external 5V battery.
Result and correct pinout