Note: This question was originally asked on Arduino Stack exchange, but closed as off-topic because it's an OpenWRT issue.
I have a Geeetech Iduino Yun Shield. I accidentally flashed the wrong firmware image (not the sysupgrade) to the board. I then tried using the Yun UBoot Reflash method. However, when I open the console monitor from the IDE and restart/reboot the board, I do not get the UBoot prompt. I have attempted to run it at least ten times without receiving any console/serial output.
The shield is running on a Leonardo base board.
Is there anything I can do to load the correct firmware onto the shield and get it operational or is it truly bricked? If it's bricked, is it possible to obtain a new Atheros AR9331 module to replace the existing one or should I buy a new Yun?
I have tried to get the shield to do an FTP boot, as detailed here by Majenko. I get to the stage where I get the
dr_boot> prompt. However, when I type in
tftpboot 0x81000000 dragino2-yun-common-v2.0.6-kernel.bin, I get no feedback; it just sits there indefinitely (unless I interrupt the process). I can't figure out what I'm doing wrong.
Note: This question, currently unanswered may be related; I'm not sure.