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AT9 / AT9S Firmware Download & Upgrade



Note Please be kindly noted that the AT9S firmware V1.2.9 by factory setting is the fundamental one that can realize all basic controls. Users can flash the latest firmware depending on the actual needs.
It’s NOT beacause RadioLink is selling the old version products in stock.
Factory Default Firmware (Eng&Chi Only): AT9(AT9S)_RadioLink_DFU_V1_2_9s_(7873).dfu



Latest Firmware(Eng&Chi Only): AT9(AT9S)_RadioLink_DFU_V1_8_0(AT12S)_b860.dfu


Latest Firmware(Multiple Languages Optional):  AT9(AT9S)_RadioLink_DFU_V2_1_0_20191111(7d62).dfu



How to upgrade AT9&AT9S firmware


1. Click to download the driver for AT9S firmware upgrade



  • This driver is applicable for RadioLink AT9/AT9S with the PC system of XP/WIN7/WIN8/WIN10.
  • Please close the poping-out window to avoid automatical installation and install the driver manually.
  • Please retry the below steps to install the driver if fail. 


2. Connect the computer and the transmitter with an android USB cable, then power the transmitter on.


3. Double click the driver installation zadig.exe. If the radio is connected successfully with the computer, the installation notification window will pop out and click to confirm. Close the driver once the installation is done.


4.Click to download the tool to upgrade the AT9S firmware.


5. Right click USB-util.exe and run the file as administrator. Device Connected will pop out then click OK to confirm.


6. Click Choose to select the preferred firmware(downloaded above) and click Download. Download OK will pop out once complete. Then disconnect the transmitter from the computer.


Note If the screen of your AT9S turns blank with leds on the transmitter flashing or upsaide down after upgrading the latest firmware above, it's because of the compatility probelm between LCD pannel and drivers. Please click to download the corresponding firmware to restore the display. After flashing the restoration firmware, the latest firmware can be flashed then. If  the problem still unsolved, please send mails to or for tech support.