J-USB
Micro-USB
Connector
Micro-USB B
USB / power port
About this component
Brings in 5 V for the AMS1117 regulator and the USB data lines for the CP2102N. The red power LED shows when 5 V is present from USB or the 5V pin. Cheap charge-only cables without data wires are the most common reason the board powers up but no port appears.
What it does on this board
Power and serial programming.
Pinout & readings
No pinout or reference readings yet — these show what each pin does and what a healthy part should measure.