Stand-alone programmer over TX/RX

Using Arduino Project Guidance
#1

Hi,

i was thinking about how could i upload HEX or INO (probably to complex) to an atmega2560(with bootloader inside) over rx tx and reset pins, without using PC. i would love to be able to put HEX in the SD card and another arduino or something would upload program to target arduino.

Has anyone saw something similar?

Thanks.

#2

Yes it is possible to upload a hex from a sd. ino not because that would require compiling. Some have made a alternative bootloader and others made a [=url=http://www.gammon.com.au/forum/?id=11638]stand alone programmer[/url].

#3