Will the bootloader be erased if hex code is uploaded using programmer?

Using Arduino Microcontrollers
1

I am going to buy a programmer and test it out. Will the bootloader be erased if hex code is uploaded using programmer? If I want to use back the Arduino IDE, do I have to re-upload the Arduino bootloader back?

2

Right.
If an Arduino ("chip", et al.) is uploaded via ICSP then the bootloader gets wiped out.
To then upload to the Arduino via USB/serial will require its being re-bootloaded.
You can upload via ICSP from within the Arduino IDE, too.

3

lightaiyee:
I am going to buy a programmer and test it out. Will the bootloader be erased if hex code is uploaded using programmer?

[/quote]

Yes.

lightaiyee:
If I want to use back the Arduino IDE, do I have to re-upload the Arduino bootloader back?

Yes.

4

lightaiyee:
I am going to buy a programmer and test it out. Will the bootloader be erased if hex code is uploaded using programmer? If I want to use back the Arduino IDE, do I have to re-upload the Arduino bootloader back?

Just make sure the last hex code file you program is a bootloader. :slight_smile: