How to Upgrade KU-007 Plus firmware

How to Upgrade KU-007 Plus firmware
Step 1. Press “ALT + F1” to setting COM2 baud rate.
Step 2. Setting CommonTool BaudRate to “57600” and setting Hardware
Shaking to “RTS/CTS”.
Step 3. Send file by CommonTool.
Step 4. Waiting KU-007 Plus to 100% and restart.