Nordic nRF93M1 LTE Metrics

Overview

The Nordic Semiconductor nRF93M1 runs pre-compiled modem firmware with commands exposed through an AT command interface.

To enable nRF Cloud to decode the LTE metrics reported by this firmware, Nordic publishes a decode file which needs to be uploaded into your nRF Cloud project.

Once the file is uploaded, LTE metrics such as PSM timer, eDRX interval, RSRP, and modem firmware version reported by your nRF93M1 devices will be decoded and available in the Metrics view. The instructions below walk through how to do this.

Downloading the Symbol File

Check the current modem firmware version using the AT+CGMR command, example:

AT+CGMR
mfw_nrf93m1_1.5.0

OK

Download the matching Symbol File from the table below:

Firmware version	Symbol file
mfw_nrf93m1_1.4.1	nRF93M1 decode Symbol File
mfw_nrf93m1_1.4.1_fotatest	nRF93M1 decode Symbol File
mfw_nrf93m1_1.5.0	nRF93M1 decode Symbol File
mfw_nrf93m1_1.5.0_fotatest	nRF93M1 decode Symbol File
mfw_nrf93m1_2.0.0	nRF93M1 decode Symbol File
mfw_nrf93m1_2.0.0_fotatest	nRF93M1 decode Symbol File
mfw_nrf93m1_2.0.1	nRF93M1 decode Symbol File
mfw_nrf93m1_2.0.1_fotatest	nRF93M1 decode Symbol File

Uploading the Symbol File

Using the Web App

Navigate to Software → Symbol Files and click the "Upload Symbol File" button to upload the Symbol File you downloaded above.

Using the Memfault CLI

Follow the instructions to install the Memfault CLI tool, then upload the Symbol File to your project:

memfault --org-token $ORG_TOKEN --org acme-inc --project smart-sink \
  upload-mcu-symbols \
  nrf93m1_decode_1.5.0.elf