Why does the Leonardo UART port get locked by the sketch and lose its COM Port in Device Manager?
niu.yixuan 2024-07-12 15:04:05 5 Views0 Replies Sometimes Leonardo Uart port will be locked by the sketch. It will lost its COM Port in Device Manager. There is a method to wake it up.
2024-07-12 15:04:05 Step1： There are 6 dots on the back of the module. This is ICSP interface. Please plug beetle to your usb cable. And watch your device manager. Using a cable to touch Pin 5 and Pin 6, then Beetle will reset. and Device manager should appear a COM port named "Arduino Leonardo bootloader (COM x)". After a few seconds, it will disappear. If you see this information you could go Step 2. Step2: Open your arduino IDE, and open any sketch like "Blink", select the board to "Leonardo". There is no COM port now. Just click "Upload". After IDE has completed verifying, touch the Pin 5 and Pin 6 immediately. You need try several times, because the correct time is not easy to be caught. 
niu.yixuan
niu.yixuan 
