2.4G Datalink Q&A
Q1
2.4G Radio Installation & Operating Environment
1. Do not operate the data link radio in crowded areas (squares, parks, etc.), areas with many obstacles (streets, parking lots, etc.), places with strong magnetic fields or signal interference (high-voltage lines, high-speed railway lines, radar stations, etc.), or any other areas that may cause economic loss or personal injury.
2. During flight, avoid pointing the tip of the antenna toward the aircraft.
3. The SAM connector on the air unit must not come into contact with any conductive objects on the drone, as this may affect signal quality.
4. The 2.4G antenna on the air unit should be placed outside the aircraft frame, not inside.
2. During flight, avoid pointing the tip of the antenna toward the aircraft.
3. The SAM connector on the air unit must not come into contact with any conductive objects on the drone, as this may affect signal quality.
4. The 2.4G antenna on the air unit should be placed outside the aircraft frame, not inside.
Q2
Is the data port on the 2.4G radio TTL or RS232?
It is TTL.
Q3
How do I connect two 2.4G radio devices?
The ground unit supports UART and USB connections. The air unit supports UART and CAN connections.
Q4
How do I purchase a CAN version of the 2.4G radio?
This version requires a custom order – please contact SIYI official support directly.
Q5
Can I replace the antenna with a different one?
Only antennas operating in the 2.4G band are supported. Use of third-party antennas is not recommended.
Q6
Why can't I connect the 2.4G radio to the data link?
1. Check if the flight controller UART baud rate matches the 2.4G radio settings, and if the serial port mode is set to MAVLINK.
2. Check if the wiring between the 2.4G air unit and the flight controller is intact and properly connected.
3. Verify that both 2.4G units are running the same firmware baud rate.
4. Check if the ground unit is properly connected to the PC or phone – try a different USB port or cable.
5. Verify that the correct COM port is selected in the ground station software.
2. Check if the wiring between the 2.4G air unit and the flight controller is intact and properly connected.
3. Verify that both 2.4G units are running the same firmware baud rate.
4. Check if the ground unit is properly connected to the PC or phone – try a different USB port or cable.
5. Verify that the correct COM port is selected in the ground station software.
Q7
Can two 2.4G radio systems be used in the same area simultaneously?
No. The frequency band is too narrow to support simultaneous operation without interference.
Q8
How do I update the firmware on the 2.4G radio?
1. Firmware updates require the SIYI parameter tuning software. Connect the device to your PC via USB.
2. Once connected, open the SIYI software and go to the upgrade interface. You will see the current firmware version. Click "Select File", choose the downloaded firmware package, and click "Upgrade". The upgrade is complete when the progress bar reaches 100%.
2. Once connected, open the SIYI software and go to the upgrade interface. You will see the current firmware version. Click "Select File", choose the downloaded firmware package, and click "Upgrade". The upgrade is complete when the progress bar reaches 100%.
Q9
The default baud rate is 115200. How do I change it?
Download and upgrade to the corresponding baud rate firmware from the official SIYI website.
Q10
Where can I get the 3D model files for the 2.4G radio?
You can contact SIYI support through the following channels:
1. Call the SIYI hotline and press "2" for technical support
2. Reach out to the official SIYI store on Taobao
3. Ask for assistance in the SIYI QQ group
1. Call the SIYI hotline and press "2" for technical support
2. Reach out to the official SIYI store on Taobao
3. Ask for assistance in the SIYI QQ group
Q11
How do I connect the ground unit to a mobile phone?
The phone must support OTG. Use an OTG cable to connect the phone to the 2.4G ground unit, then open the ground station app and tap "USB Connect" to start.
Q12
Why is the signal weak at the antenna tip?
This device uses an omnidirectional antenna, which provides the strongest signal when the antenna is positioned vertically.
Q13
What should I do if the device is not recognized when connected to a PC?
Download and install the CH340 driver.