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About Power Supply

1. Q: Whats the power supply standard for Viewpro gimbal cameras?

Answer: The power supply range of Viewpro gimbal is 3S~6S (12V~24V), except the special customized version (without the CONN board – main board of control box). Excessive high voltage and high voltage ignition when the power supply is not connected to the voltage regulator module will cause the gimbal burned out, and there will be no response when it is powered on. 

2. Q: Why there is no response and cannot work after the gimbal is powered on?

Answer: Use a DC stabilized power supply to check if the current is 0 or not. 0mah means the power line is an open circuit, check whether the two ends of the line are well plugged in. If there is no DC power supply, use the voltage grade of the multimeter to test the voltage of the two power lines to the gimbal. If the voltage of the point is 0V, it means that the power line is an open circuit. Check whether the two ends of the line are well plugged in. 

3. Q: Why camera has no video output after home position?

Case 1: Gimbal power supply is not enough

Answer: Make sure power supply is 3S~6S (12V~24V), make sure the power cable can support 2A electric current.

Case 2: Gimbal internal power problem

Answer: The internal power cable of the gimbal is pressed.

Series Port TTL Connection

1. Q: How to test the provided USB to TTL cable?


(1) The PC needs to install the serial port driver. After connecting USB end to the PC, check the “Device Manager”-”Port”-”USB-SERIAL CH340 (COM x)” to confirm the correct COM port.

(2) If there is no “USB-SERIAL” icon, please install the serial port TTL driver.

(3) After installing the driver, connect the wire TX and RX of the cable together, use the serial port assistant to send data to check whether the serial port environment is normal or not. If it can receive what it just sent to itself, means the cable is normal. 

2. Q: How to solve the problems that serial port does not work? 

Case 1: Use the provided USB to TTL cable, can control gimbal, but no feedback

Answer: Re-connect both ends of the cable and try again. If there is still no feedback, test the TX-RX of the cable itself (Re. 2.1 How to test the provided USB to TTL cable?). Check if the sent and received data is consistent or not to confirm if the cable is good or not. If the cable is normal, restart the gimbal, and try again. If it is still abnormal, it may be the wiring is an open circuit inside the gimbal. For standard version gimbal, re-connect the 15pin cable on control box. For Viewport version, re-connect the serial port wiring terminal and re-connect the Viewport.

Case 2: Standard version: The yellow jumper cap on the CONN board is off, can not control the gimbal (pitch and yaw), but the camera control (zoom and record) is normal.

A: Need to make short-circuit at the jumper cap position.

Case 3: Standard version: The gimbal is under S.Bus mode, meantime the serial port cannot communicate.

Answer: Follow the related instruction to recover serial port control.

Case 4: Gimbal can not communicate via TCP/TTL.

Answer: Test the gimbal by PWM control. If the camera cannot be controlled, and the program light on the CONN board does not flash, probably the CONN hardware is damaged, return to factory for repair.

Case 5: Standard version: Can control gimbal but not the camera

Answer: 1) Check if the software of the gimbal is match or not, e.g. the cameras (Z40K, Z-Fusion pro, Q30XIR) have 2 baud rates, need to pay attention to this point.

2) Check if the communication from camera RX to CONN board TX is OK or not. If not OK, need to repair.

3) If the communication from camera RX to CONN TX is OK, switch a CONN board of same model (if it’s available) to test, or remove the diode D20 on CONN board and test again.

4) If still not works after all above operations, probably the camera module is broken. 

IR Thermal Camera/Tracker
About ViewLink
About S.Bus

1. Q: Gimbal has no respond to S.bus control?

Case 1: The gimbal is with very old CONN board (chipset is not 303, or purchased before 20190715)

Answer: Not support S.Bus control.

Case 2: The gimbal is a new CONN board (blue CONN version)


1. Check whether the wiring is correct

2. Reset S.Bus control

3. Test the S.Bus function. If only half functions are supported, upgrade the CONN board to the latest software.

Case 3: After setting the S.bus channels in the gimbal, only one side works.

Answer: The gimbal during 20190715–20200515 needs to upgrade the CONN board program and use the latest S.Bus setting method to solve the problem. 

2. Q: How to reverse the signal of S.bus channel?

Answer: Set by serial command AA 55 1A IV FF、AA 55 1B IV FF

3. Q: Whats the PWM control standard?

Answer: The ESC can recognize PWM pulse width between 1ms-2ms. 1ms is the lowest for throttle, 2ms is the highest of throttle. 1.5ms is the middle.

About Network
About GPS/Flight Control Integration