RedThunder RT84 Retro Typewriter Keyboard, UK Layout, Bluetooth 5.0 Wireless Mechanical Keyboard, Multi Devices Connection for PC/MAC/Laptop/Tablet/Phone

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Please connect your radio and computer, Turn on your radio, choose the correct communication port(the communication port need to maintain consistency with your computer) ; hi, the VFo mode can help you set your Vfo MODEL with the PMR446 frequency, but you can not save it as a channel! If you find your RT84 can’t program, please don’t worry, today we will give you a method to solve the problem when you program your radio.

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VFO mode: RT84 has the VFO mode, you can Establish temporary channel in keyboard, no need the PC and programming cable. RT84 is our new arrival. We know RT84 is a dual band DMR radio, so many more functions we need to program by RT84 software. Press the top sidekey and PTT together, turn on the radio at the same time. we will see that the led is flashing red and green. It means the RT84 is in DFU mode. The first one worked for a while, I was able to update the firmware, program the radio etc, now it keeps saying “Device Descriptor Request Failed” when I plug in the usb cable

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If you can see the “TM Device in DFU Mode”like the picture above, it means driver installed successfully,and it is connected properly. Scan list: You can add 250 scan lists, and each scan list can add the channel member shall not be greater than 31!

to Upgrade Retevis RT84 Firmware - Ailunce Blog How to Upgrade Retevis RT84 Firmware - Ailunce Blog

Buttons Definitions: RT84 has 3 side button, and the P1 P2 on keyboard you can setting as you need. Note: If the RT84 is not in the DFU mode before upgrading, you will can't upgrade successfully. Or will result white screen.Secondly:Choose the VFO A or VFO B in the mode you want to programme,Normally we set VFO A to digital mode and VFO B to analog mode.