Digital Modem from BG5ROJ: New firmware 1.04b available

UPDATE 2018.05.13 – FYI, I no longer support the BG5ROJ modem. Please, contact the manufacturer directly. Thanks for your understanding.


HardwareChipA new firmware is now available for the Digital Modem from the BG5ROJ group : version 1.04b.

You can download the firmware upgrade at this link : Firmware 1.04b download link

Thanks to Berj KI3U for the hint!

Note that you must also have the PC software running on Windows platform to proceed with the upgrade. The software can be found at the link : PC upgrade software


For more information on how to upgrade the modem, please check you user manual. It is really important to follow carefully the manual instructions to make sure to not bricked your modem. A useful hint, make sure to use fresh batteries for this step.

How to upload the firmware?

The modem has a firmware uploading feature to enable more future functions and features. Follow the steps below to start the firmware uploading:

Step 1 : Rotate the VOL potentiometer to the right end, turn the unit on and it will enter the boot-loader mode.


Step 2 : Connect the USB cable between the PC and modem, load the dsPIC33E/PIC24E loader Application program, enable the USB upload feature and then click “Connect”


Step 3 : Load the new firmware, click “Erase-Program-Verify”, as the picture below:

Meanwhile, do not forget to follow me on Twitter @VA2SS, and subscribe to my blog and my YouTube channel as well.

Have fun and stay tuned!

Jeff | VA2SS