Attention: If you can not download the files or zip file below, please click the website below to download the files you need.  

http://www.radiolink.com.cn/firmware/transmitter/T8S(BT)/

1. Firmware Upgrade Tool

Click to download the firmware upgrade Driver, only applicable to computers.

Note:

Please install the driver when using the computer parameter set APP for the first time. For the T8FB/T8S upgrade driver installation tutorial, please click the article below to view it.

If the computer is a Windows 7, 8, or XP system: https://www.radiolink.com.cn/driver_for_T8FB/T8S_firmware_upgrade_tool_installation

If the computer is a Windows 10 or 11 system: https://www.radiolink.com.cn/T8FB_and_T8S_parameter_setup_software_driver_installation_for_WIN10

WinZip(design by 360, free)

If you do not have the WinZip Tools to decompress upgrade files, please click to download and install the free WinZip Tool designed by 360.

2. Upgrade Firmwares

（1） The latest firmware

The firmware version can be checked on the parameter setup APP(SYSTEM menu) in mobile or computer(PARAMETER at the bottom right). If the wrong firmware is accidentally flashed and the system of T8S(BT) is crashed, please remove the cover and disconnect the battery and connect again. Then upgrade the firmware downloaded below.

① The current batches of T8S(BT): Long-press the power button for 1 second and release to turn it on.

If the wrong firmware is flashed and the device can't be powered on, or the LED indicators flash abnormally. Please download the V891 firmware to repair.

Click to download the latest firmware:

Attention:

① Add joystick dead zone; after upgrading, joysticks must be recalibrated; reboot after calibration is completed.

② Compatible with the parameters set up APP versions of Android mobile phone APP V11.1(or above), Apple mobile phone APP V4.2.2(or above), or computer APP V11.1(or above).

V891 Update Notes:

Fixed an issue where data for “Gyro Sensitivity” in Standard Mode – HOLD was not being transmitted.

V890 Update Notes:

(1) Update: Added “Stick Mode: Auxiliary” to System Settings.

(2) Update: Added SwA, SwB, VrA, VrB/SwC, Midpoint, Lock-C, STK1, STK2, STK3, STK4 to Auxiliary Channels.

(3) Update: For Auxiliary Channels CH1–CH4, when “Stick Mode: Auxiliary” is selected, users can customize the auxiliary channel assignments.

(2) Firmware for turning off the Trim Function

Click to download the firmware for turning off the Trim Function:

Attention: After upgrading this firmware, the Aileron, Elevator, Throttle, and Rudder trim buttons' mechanical adjustment functions will be canceled. It is designed for remote controllers that control logistics, fire fighting, and short-distance unmanned delivery vehicles or drones.

(3) Factory Default Firmware

Click to download the factory default firmware:

Attention: please use the V603 parameter setup APP if the firmware version of your transmitter is V826

② The previous batches of T8S(BT): Slightly touch the power button to turn it on.

If the wrong firmware is flashed and can’t be powered on, or the LED indicators flash abnormally. Please download the V810 firmware to repair, and no other firmware can be flashed afterwards.

Click to download the firmware: T8SBL_LatestFirmware_V810(OldVersion1s).hex

How to update the firmware of T8S?