Once configured correctly, the status bar at the bottom of RKDevTool should switch from "No Devices Found" to or "Found One MASKROM Device."
Ensure you aren't using a "charge-only" cable. rkdevtool no devices found
RKDevTool does not recognize devices in "Normal" booted mode. Your device must be in or Loader mode to be detected. Once configured correctly, the status bar at the
Some Rockchip boards (like the RK3399 or RK3588 series) draw more power than a standard USB port can provide. Once configured correctly