[oshug] JTAG options

Hello, I have some Meraki access points which I'd like to re-flash with OpenWRT as the devices with the stock firmware are useless without a contract to tie it into the hosted management platform and Cisco removed the command used to reflash the device from the firmware environment before they were EoLed, hence leaving the JTAG route as the only option.

I was wondering, what is the cheapest device I can get away with for use with OpenOCD? Could I get away with using an SBC without investing in new hardware?

Regards,

Sevan