10/21/2023 0 Comments Arduino mega 2560 usb 2.0 serial![]() ![]() This means you have to disassemble your project to access the resistor or add a switch if you want to use USB to debug later or upload new code. ![]() I found this which is related to the issue but not a proper workaround:Įdit: I can confirm using a resistor to short pins 0+1 together (serial) works but it is not a proper solution. The program will seem not to initialize serial in setup(). ![]() ![]() I am working on a project with a Mega 2560 and a Sim800L module.Įverything works fine, however if i don't connect the USB port (at least once) and power only externally (either by Vin unregulated 7-12V or 5V regulated pin)
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