Xiaomi R4C USB MOD

[RadioOperator]

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Solved->SUCCESS->Xiaomi MI 4C USB mod

Hello guys, To make long story short I'm modifying this router based on MT7628AN for usb. as per datasheet, I soldiered necessary connections to unused pins and made serial TTL output but it don't detect usb devices at all. dmesg show nothing when i insert usb devices, lsusb show error -99 that i cannot find description for. allso serial TTL somehow have disabled RX that i can see console but cannot activate console to send command. I used finished openwrt firmware that i updated with usb suppo…