Discuss building and using the 3G rotary cell phone kit. If you're seeking help or would like to help others, this is the place to post.
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Edited: this topic was For Justine's eyes only (firmware suggestion)
(2866 views at end of December!)
There are two ways to upload firmware:
- via the ICSP socket (programming adapter but no bootloader required)
- via the USB socket (no programming adapter but bootloader required)
Option (1) overwrites any existing bootloader, the recipient will need an ICSP programmer to upload firmware. With option (2) no programming hardware is required and the bootloader remains intact after uploading firmware.
Although option (1) is very easy and reliable, for shipping to others I recommend first programming a bootloader via ICSP then uploading firmware via USB. That way the recipient can upload firmware using either option.