Reset an arduino to factory

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1

hi all,

I have here an arduino uno and mega 2560 both with code on it.
This code was programmed via an atmel ice an I would like to return there in there factory condition.

When I program the following bootloader I get some errors.
uno: \arduino-1.8.5\hardware\arduino\avr\bootloaders\optiboot\optiboot_atmega328.hex
mega: arduino-1.8.5\hardware\arduino\avr\bootloaders\stk500v2\stk500boot_v2_mega2560.hex

When I try to program them then with the an example I get the following error code:
Uno:

C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega328p -carduino -PCOM5 -b115200 -D -Uflash:w:C:\Users\dylan\AppData\Local\Temp\arduino_build_632740/BareMinimum.ino.hex:i
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

avrdude: Version 6.3, compiled on Dec 16 2016 at 13:33:19
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"

Using Port : COM5
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x35

Mega:

C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega2560 -cwiring -PCOM6 -b115200 -D -Uflash:w:C:\Users\dylan\AppData\Local\Temp\arduino_build_632740/BareMinimum.ino.hex:i

avrdude: Version 6.3, compiled on Dec 16 2016 at 13:33:19
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"

Using Port : COM6
Using Programmer : wiring
Overriding Baud Rate : 115200
avrdude: stk500v2_ReceiveMessage(): timeout

Can someone help me with this problem?

2

If code was programmed using an Atmel ICE (or any ISP programmer), that would have erased the bootloader, so that you need to do a "burn bootloader" (or equivalent) (using an external programmer) before you can simply "upload" sketches again.

3

where can i find the bootloaders? the one i used aren't working

4

The bootloaders should be included in the Arduino IDE installation, automatically accessed by the "burn bootloader" command. The actual .hex files end up being in ".../hardware/arduino/avr/bootloaders/*" (exact location dependent on OS, install method, and actual board.)

5

Click "Burn Bootloader"