Fix Avrdude: Stk500_getsync(): Not in Sync: Error in Arduino By ssiddharth in CircuitsArduino687Introduction: Fix Avrdude: Stk500_getsync(): Not in Sync: Error in ArduinoBy ssiddharthYouTube ChannelFollow More by the author: About: DIY Enthusiast More About ssiddharth »A video on how to fix the avrdude: stk500_getsync(): not in sync error.