17.07.2 Release Notes

Release Date: Sep 8, 2017

See Licenses to view Legato AF Licensing Information.

The following provides a summary of changes that have been made in the 17.07 Legato AF Release.

Download the source code and get started with building Legato AF.

Legato Application Framework Release Process

Legato AF releases are not tied to any specific module product release. Once we have released Legato AF, module vendors (like Sierra Wireless) will take the release and integrate it into their own product release.

Legato AF Release Schedule VS Module Vendor Release Schedule



  • Legato AF Team posts release 17.07
  • Module Vendor takes release 17.07 and builds an associated Linux Distro to create a "Legato Platform"
  • Module Vendor tests and releases a "Legato Platform" with their Modem Firmware as "Product Release Y"
  • Legato AF Team posts release 17.08, 17.09 and 17.10 without the Module Vendor packaging it into a Product Release. Releases are able to installed with the vendor's Product Release Y, but may not be officially supported by the Module Vendor.
  • Module Vendor takes release 17.11 and creates a "Legato Platform" and "Product Release Z", and so on..

For any questions about the Product Releases please contact your Module Vendor directly.


The following are the list of patches that have been applied to Legato AF 17.07:

Version 17.07.1 resolved an issue where running make with the tarball distribution of Legato AF produces an error (the build is still successful, even with the error):

Example of error message:

Version (-v) not set
make: *** [stage_mkavmodel] Error 1

Resolution: download the new tarball and run make clean and then make for your target: legato-17.07.1.tar.bz2


$ make clean
$ make wp85           # make <target>

Version 17.07.2 resolved the following issues:

  • Asset Data could not be aggregated so the Time Series data was never populated and could never be pushed to AirVantage.
  • avcCompat app was missing when building for the WPx5xx or when using the wifi.sdef.

New Features

The following are the list of new features that have been added into the 17.07 Release:

AirVantage Improvements

The 17.07 release contains AirVantage Connector Service fixes and improvements to documentation:

GNSS Service

platformConstraintsGnss_SettingConfiguraton information has been added in the GNSS API.

Flash Management

Flash API has been added to provide bad image detection for certain platforms. Please check with your module vendor to see if your module supports bad image detection for flash drives.

Fixed Issues

All development work is tagged in GitHub as "17.07.0". The list of changes and commit messages can be found on GitHub.

Legato AF 17.07.0 Fixes

Known Issues

Constraints and Limitations

Dev Machine Linux Version

To develop applications within the Legato AF, a Long Term Support version of Ubuntu Linux is needed on your dev machine (or running in a virtual box on Windows). Any release older then Ubuntu 12.04 is no longer supported by the Legato AF.

ECM-USB modem manager issue

Ubuntu 15.10 and newer is default installed with Modem Manager version 1.4.12-1ubuntu1 which conflicts with the ECM-USB driver when connecting a target. Modem manager may cause the Ubuntu Network Manager to crash on your host and/or your target device to become unavailable over USB.


  • NetworkManager crashing when plugging into your device over USB, or
  • The target device becomes inaccessible after 30 seconds.

Recommended Work Around:

Open Issues

The following is the list of known issues that still exist in Legato 17.07.0 and are currently under investigation:

Legato AF

  • Apps that need to only run for a short time (e.g.; development, factory test, short running monitoring) may run into an issue where reboot detection may prevent the App from being able to restart or shutdown properly.

Config Tree

  • Removing an app may remove another apps tree if the first apps requires section lists the second app.


  • app status doesn’t have a "waiting" status if an app is waiting it gets reported as "running".
  • configEcm will give a confusing error message about IP's not being on the same subnet when other errors are present.

AirVantage Connector

  • Firmware over-the-air updates may not suspend or resume properly when the target is power cycled in the middle of a download.

Audio Service

  • "Pop" noise on usb audio at the end of a play or when stopping an ongoing file

Data Connection Service

  • "wifi client disconnect" does not release current Wifi connection

eCall Service

  • First tone in DTMF is often missed or has a shorter duration.
  • LE_ECALL_STATE_TIMEOUT_T6 is not handled when T6 expires. The timeout event is not generated in the eCall handler.
  • MSD transmissions fail over SMS when the FDN is locked.
  • The fall-back SMS is not received during an Era-Glonass eCall session.

GPIO Service

  • Only one service is able to access a GPIO pin at a time

SPI Service

  • Driver does not support speeds lower than 960000 baud

UART Service

  • Modem does not support serial baud rate of 1000000