Hi, I've recently been unable to upload sketches to my Arduino Uno, previously it all worked fine. The error message says: Uflash:w:C:/Users/David/AppData/Local/Temp/arduino-create-agent661972794/Heater_Bank_Control.hex:i avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsyn…

not in sync

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