![At the end of my rope. Getting the fabled not in sync: resp=0x00 error with a custom ATMega328P PCB. Help? : r/arduino At the end of my rope. Getting the fabled not in sync: resp=0x00 error with a custom ATMega328P PCB. Help? : r/arduino](https://external-preview.redd.it/VsZPYXRkMEaC7bhptrcUnss_cedf89jRjAfHSiBw0Rc.jpg?width=640&crop=smart&auto=webp&s=81cc25c851a39f5dbb1c7d7355cc5ed0dd222bb4)
At the end of my rope. Getting the fabled not in sync: resp=0x00 error with a custom ATMega328P PCB. Help? : r/arduino
![avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x00 avrdude: stk5 - Avrdude, stk500, Bootloader issues - Arduino Forum avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x00 avrdude: stk5 - Avrdude, stk500, Bootloader issues - Arduino Forum](https://aws1.discourse-cdn.com/arduino/original/3X/8/0/805619840edb5c6d3d26c9c6e0cf1bb51168f1b5.png)
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x00 avrdude: stk5 - Avrdude, stk500, Bootloader issues - Arduino Forum
![avrdude: stk500_getsync(): not in sync: resp=0x00!!!!!!!!!!!!!!!!!!!!!!!!!!!!! - Installation & Troubleshooting - Arduino Forum avrdude: stk500_getsync(): not in sync: resp=0x00!!!!!!!!!!!!!!!!!!!!!!!!!!!!! - Installation & Troubleshooting - Arduino Forum](https://aws1.discourse-cdn.com/arduino/original/4X/3/8/6/386aea75ea18a01b45117511044b123d84ab845a.jpeg)
avrdude: stk500_getsync(): not in sync: resp=0x00!!!!!!!!!!!!!!!!!!!!!!!!!!!!! - Installation & Troubleshooting - Arduino Forum
![arduino uno - avrdude: stk500_recv(): programmer is not responding + avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x47 - Arduino Stack Exchange arduino uno - avrdude: stk500_recv(): programmer is not responding + avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x47 - Arduino Stack Exchange](https://i.stack.imgur.com/jF6TI.png)
arduino uno - avrdude: stk500_recv(): programmer is not responding + avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x47 - Arduino Stack Exchange
![SOLVED]Please help me! avrdude stk500_getsync() not in sync resp=0x00 error - Installation & Troubleshooting - Arduino Forum SOLVED]Please help me! avrdude stk500_getsync() not in sync resp=0x00 error - Installation & Troubleshooting - Arduino Forum](https://aws1.discourse-cdn.com/arduino/optimized/4X/a/a/5/aa56603c1b27cd4eaee1f8192205c76f486e57e6_2_281x500.jpeg)