TEF6686 receiver firmware upgrade from 1.18 to 2.0

Performing firmware upgrade of a Chinese TEF6686 radio receiver originally shipped with 1.18. Many new features become available including computer control. The TEF6686 chip is known for its sensitivity especially on the FM band.

[@icholakov]

Please note that this is specific to receivers that have a physical boot button. There are some versions which do not have a boot button and go into boot mode automatically

[@aunumero73]

With the blue TEF, there no need to remove the back of the receiver. It perfectly works by simply attaching the device to the PC and then following the steps described in the video (TEF must be turned ON, of course).

[@sergeypadalka2537]

Hello. Blue TEF without a download button, I can’t flash it. When you press start on the keyboard and then turn on the receiver, it plays, the firmware does not work. The question is when should the receiver be turned on when flashing the firmware immediately or later during the operation.

[@cazkasjmir]

On aliexpress I see these radio's with LNA version 5.0. Is that the latest upgrade ?

[@icholakov]

Yes the LNA and V5 is the latest. They will ship with a later firmware too, the video is for firmware 1.18 which by now is outdated

[@winexprt]

@@icholakov Thanks! Was just going to ask this as I want to buy this radio, but I have no way of updating to the latest firmware as I don't own a Windows PC, only a Mac.