cvoinescu wrote:The Seeeduino should be upgradeable via USB, if it has the Ardunio bootloader.
If it doesn't, then yes, you need a programmer -- or another Arduino and a few wires to connect them together. There is an Arduino program that acts as a programmer for another Ardunio (I forget the name). You can use that to burn the firmware onto the Seeeduino, and then upload GRBL 0.8c to it the usual way, via USB.
Since I bought my seeeduino as a bundle, it doesnt have the Arduino bootloader on it.
I have done some research and found a tutorial online on how to use an Arduino UNO as an ISP Programmer in order to send Hex files to an Arduino.
The link is: https://www.sparkfun.com/tutorials/247
This other tutorial seems to be a great way to do it: http://www.synthetos.com/wiki/index.php ... ng-Method3
However it is based upon having an AVR programmer. If I am using an arduino UNO as the ISP can I proceed as if I am using an AVR programmer once I have the arduino setup as a programmer?
This seems like it will work, however I was wondering if you could take a look and see if this is the correct way to flash the hex file to my board. I am nervous about upgrading because my current system does work with the .8a, but it definitely has limited functionality when I compare it to .8c (coolant control, limit switches, homing cycle)