Guilin Feiyu Technology Incorporated CompanyGuilin Feiyu Technology Incorporated Company www.feiyu-tech.com service@feiyu-tech.com- 2 -3. Double click on the icon to open the update software UPGRADE_V1.09D. If there areupdates both for gimbal and keypad board, please upgrade firmware of keypad boardfirst.4. Choose right port number and baud rate as 115200, then click on OPEN COM buttonto open COM port.