nRF91 Modem Firmware (MFW)

Conexio Stratus Pro comes with the latest version of the nRF9161 SiP hardware, preloaded with latest modem firmware and with a sample application that blinks the device LED, and prints the output to the terminal.

Updating the Modem Firmware

If needed, one can update MFW using an external programmer and a 10-pin SWD cable using, for e.g., either nRF5340 or nRF9160 development kit, following the steps outlined below.

• First, download the latest nRF9160 SiP modem firmware from the Nordic Semiconductor website under the download firmware section.

• Connect the Conexio Stratus dev kit to the nRFxx development kit via the SWD cable. Then connect the nRF Dev kit to the laptop with a micro-USB cable.

• Start the nRF Connect Desktop application and open the Programmer.

• In the Programmer navigation bar, select the device from the drop-down list. You can identify the nRFxx DK by the fact that it has three COM ports.

• Then click Update modem under Cellular Modem on the bottom right-hand side.

• Navigate to the folder where you have downloaded the modem firmware zip file. The file naming starts with mfw_nrf9160_*.zip followed by the number of the latest version. Select the zip file and click Open.

• In the Programmer application, the Modem DFU window appears. Click Write to start updating the firmware on the device.

• When the programming starts, you should see the progress bar as follows:

• When the update is complete, a Completed successfully message appears.

After flashing, press the reset button on the board for the changes to take effect.