Anybody knows if the meraki MR20 can be flashed with OpenWRT
There is currently no support for MR20 available, AFAICS.
You are welcome to try adding support, it has a compatible chipset
however I am not sure which chipset exactly...can you provide FCC ID?
the first step is to open the case and remove shields (carefully like a tin lid)
record all the chip models, identify the UART pins for serial console
however the MRxx series is tricky apparently...requires a custom bootloader (?)
probably this depends on the model?
I believe I found it
FCC ID is this?
UDX-60066010
pictures:
https://fccid.io/UDX-60066010/Internal-Photos/GR10-MR20-USA-FCC-Photos-3720672
you can start studying this commit which is very similar to this board
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=4943afd7818f56053231a5a7ae90e55da44f1f08
It seems that uboot on these boards to not allow access to the console for TFTP command
you might have to send it in to someone....