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Try to use platformio for programming your arduino boards is better in everything than arduino ide and you will not find this problem
Bluetooth is something of a serial comm resource so its conflicts with arduino serial port .
Thankfully, Arduino forum member eried did us all a great favor in isolating and solving the problem.
Here’s a link to the “fixed” rxtxSerial.dll file (wrapped in a rar). All you need to do is swap it in for the existing rxtxSerial.dll file in the Arduino directory
