YS-S4 Multi-rotor Autopilot User Manual V1.4
5) Click "Open" button, select upgrade procedure file"s4v2‐BiaoZhun‐20140115‐v021.bin"
6) The program will auto‐upgrade when the upgrade procedure is selected.
7) Power‐off the autopilot when it says "upgrade successful". Quit the firmware upgrade software and power
off the autopilot.
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