Crossposting this from the HOWTO forum since questions aren't supposed to be posted there.
So, this device is in the table of supported hardware but there is no information on exactly how to install OpenWRT. The build flow only produces "openwrt-ramips-rt305x-wcr150gn-squashfs-sysupgrade.bin" but no "factory" image is created. How do I get OpenWRT onto the device in the first place? I tried using the generated OpenWRT bin file with the SparkLAN firmware upgrade web interface but it detects it as invalid firmware and aborts the process.
Does the stock SparkLAN firmware have a bootloader that I can interact with (tftp maybe)?