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Answer
This section summarizes how to perform Secure OTA firmware update to the Lyra devices in the field. For testing, the soc-empty template can be used and first steps is to modify the project so that a change can be detected in the EFR Connect mobile app if the device is successfully updated. The next steps is to store the signed image to a cloud storage service that your mobile device can access and the final steps will be to use EFR Connect to initiate an OTA update.
- To generate signed images for soc-empty template please modify the BLE device name and change it to: LCI Example in the soc-empty project, build the project and finally run the script create_bl_files.bat/sh using the same private key file signing-key.
- Copy output_gbl folder with the images: application-signed.gbl, application.gbl, apploader.gbl, apploader-signed.gbl, full.gbl, and full-signed.gbl to Dropbox cloud storage for example.
- Run EFR Connect to perform the OTA procedure, please experiment with partial, full signed images for successful updates and to initiate the failed update use unsigned images.