Arduino Nano uploads code only once stuck on second upload

[engabdulhafeez]

Hi everyone,

I'm using a clone Arduino Nano with an ATmega328P and a CH340 USB chip.

When I upload code the first time, it works fine. But when I try to upload a second sketch or upload again, it just gets stuck on "Uploading…" in the Arduino IDE

I can fix this by reburning the bootloader using a USBasp and this AVRDude command:

C:\avrdude\avrdude.exe -C C:\avrdude\avrdude.conf -c usbasp -p m328p ^
-U efuse:w:0xFD:m -U hfuse:w:0xD9:m -U lfuse:w:0xFF:m ^
-U flash:w:"C:\avrdude\atmega.hex":i

But this is very annoying to do every time.

I already tried:

• Selecting ATmega328P (Old Bootloader) in the Arduino IDE
• Pressing the Reset button during upload
• Changing USB ports and cables

Still, it only works once after that, it hangs unless I re-burn the bootloader.

My Questions:

1. Is my AVRDude command correct for this clone Nano?
2. Why does it only upload once?
3. How can I fix it permanently, so the Arduino IDE uploads every time?

Thank you in advance

[xfpd]

What are the upload results when you use the IDE? (the IDE should time out)

[Budvar10]

There are lock bits to protect the bootloader section from a software update you have to set.
With USBasp it is able read out everything from ATmega to check the settings - flash, fuses, etc.

[sonofcy]

I have never burned a bootloader in 60+ years of programming. Maybe the serial monitor was left open, and that prevented the second upload.

[gilshultz]

@engabdulhafeez

when I try to upload a second sketch

Welcome!
I have seen that many times. Most of the time, cycling the power, closing the IDE and reloading it solves the problem. Nice part the IDE automatically reloads the sketch I was working on. Generally a shorter cable will give better results. I also add a delay(3000) or something like that in the setup() just after I set the baud rate. This allows things to settle down and If my software floods (locks up by constantly printing) it gives me a moment to recover.