Скачать или смотреть Upload HEX without IDE & FIX avrdude: stk500_???? - Arduino Nano

Keep getting stk500_recv/getsync errors when uploading to your arduino?
Want to upload a firmware/hex file you didn't compile yourself?
This video explains how to easily solve your issues.

Ensure verbose logging is enabled (explained at 4:02)

Windows users will need to tweak the commands used slightly, but the overall approach remains the same regardless of your OS.

SPOILER ALERT - To fix the worst of the avrdude stk500 errors an Arduino UNO is needed to bypass programming of the nano using USB. Some basic electronic skills are assumed.

0:45 Wrong board & PORT chosen
2:53 Upload custom HEX file using USB
7:25 Summary of HEX upload
8:11 Upload fails with stk500!!!
9:15 The fix explained
11:00 Upload ISP sketch to your UNO
11:56 Wire up the UNO to NANO
12:43 Schematic
14:00 Upload via ISP
14:20 Upload custom HEX using ISP


One of the better guides to setup the UNO for ISP programming:
https://www.instructables.com/Program...