# Legato Application Framework **URL:** https://forum.legato.io/c/legato-application-framework/5.md [Latest](https://forum.legato.io/latest.md) · [Categories](https://forum.legato.io/categories.md) --- ## [About the Legato Application Framework category](https://forum.legato.io/t/about-the-legato-application-framework-temporarily-locked-category/11)
**Author:** [@system](https://forum.legato.io/u/system)\ **Replies:** 0\ **Last updated:** [December 23, 2013, 2:52pm UTC](https://forum.legato.io/t/about-the-legato-application-framework-temporarily-locked-category/11 "2013-12-23T14:52:07Z")
Legato Application Framework --- ## ["update" tool is \*not\* deprecated](https://forum.legato.io/t/update-tool-is-not-deprecated/256)
**Author:** [@jchitty](https://forum.legato.io/u/jchitty)\ **Replies:** 0\ **Last updated:** [September 8, 2016, 10:48pm UTC](https://forum.legato.io/t/update-tool-is-not-deprecated/256 "2016-09-08T22:48:56Z")
If you run the host-side “update” script in 16.07, you’ll see a message: This is a mistake. ‘app install’ will be going away in the next release, while ‘update’ will stay. This error was introduced during an effort t… --- ## [Important - legato topics locked & moving to new forum](https://forum.legato.io/t/important-legato-topics-locked-moving-to-new-forum/254)
**Author:** [@thibs](https://forum.legato.io/u/thibs)\ **Replies:** 0\ **Last updated:** [September 7, 2016, 4:53pm UTC](https://forum.legato.io/t/important-legato-topics-locked-moving-to-new-forum/254 "2016-09-07T16:53:08Z")
UPDATE (Friday 5pm CEST): As planned, this section of the forum is now LOCKED until tomorrow. Thanks in advance for your patience, and sorry for the inconvenience. Dear Legato forum users, We have a great news! This … --- ## [Legato 16.07 now available](https://forum.legato.io/t/legato-16-07-now-available/245)
**Author:** [@jacwu](https://forum.legato.io/u/jacwu)\ **Replies:** 2\ **Last updated:** [October 3, 2016, 7:57pm UTC](https://forum.legato.io/t/legato-16-07-now-available/245 "2016-10-03T19:57:27Z")
Hi everyone. Our new release of Legato, 16.07, is now available. The links on the Source at github.com/legatoproject/legato-af has been updated with the new source and documentation. You will find the documentation onl… --- ## [Legato 16.04 - Developer Studio 4.1](https://forum.legato.io/t/legato-16-04-developer-studio-4-1/232)
**Author:** [@daav](https://forum.legato.io/u/daav)\ **Replies:** 0\ **Last updated:** [June 24, 2016, 7:15am UTC](https://forum.legato.io/t/legato-16-04-developer-studio-4-1/232 "2016-06-24T07:15:53Z")
Hi all, Please note that Legato 16.04 bundles for WP8548 are now available. These bundles are both usable for Linux command line Legato apps development and for new Developer Studio 4.1 IDE (Linux and Windows). Fresh … --- ## [Legato 16.01 - legato-spm 1.0 - Developer Studio 4.0](https://forum.legato.io/t/legato-16-01-legato-spm-1-0-developer-studio-4-0/204)
**Author:** [@daav](https://forum.legato.io/u/daav)\ **Replies:** 0\ **Last updated:** [February 25, 2016, 9:38am UTC](https://forum.legato.io/t/legato-16-01-legato-spm-1-0-developer-studio-4-0/204 "2016-02-25T09:38:43Z")
Hi all, Please note that Legato 16.01 pre-built packages for WP8548 are now available. These packages are both usable for Linux command line Legato apps development (thanks to legato-spm tool), and for new Developer St… --- ## [New Developer Studio 3.6 release](https://forum.legato.io/t/new-developer-studio-3-6-release/171)
**Author:** [@daav](https://forum.legato.io/u/daav)\ **Replies:** 0\ **Last updated:** [November 23, 2015, 11:52am UTC](https://forum.legato.io/t/new-developer-studio-3-6-release/171 "2015-11-23T11:52:27Z")
Hi all, Please note that a new Developer Studio 3.6 release is available for update from now. This new version is compatible with Legato 15.10. Source content (release note, getting started guide, troubleshooting guid… --- ## [Legato 15.08 now available](https://forum.legato.io/t/legato-15-08-now-available/161)
**Author:** [@amitchell](https://forum.legato.io/u/amitchell)\ **Replies:** 0\ **Last updated:** [September 3, 2015, 10:22pm UTC](https://forum.legato.io/t/legato-15-08-now-available/161 "2015-09-03T22:22:21Z")
Hi everyone. As some of you may have already noticed, our new quarterly release of Legato, 15.08, is now available. The links on the Source at source.sierrawireless.com/legato/ have all been updated to point to the new … --- ## [Legato 15.05 now available](https://forum.legato.io/t/legato-15-05-now-available/144)
**Author:** [@amitchell](https://forum.legato.io/u/amitchell)\ **Replies:** 0\ **Last updated:** [June 5, 2015, 11:47pm UTC](https://forum.legato.io/t/legato-15-05-now-available/144 "2015-06-05T23:47:09Z")
Hi everyone. Our new (almost) quarterly release of Legato, 15.05, is now available. The links on the Source (the new Dev Zone) at source.sierrawireless.com/legato/ have all been updated to point to the new downloads, an… --- ## [Legato 15.01 now available](https://forum.legato.io/t/legato-15-01-now-available/95)
**Author:** [@amitchell](https://forum.legato.io/u/amitchell)\ **Replies:** 4\ **Last updated:** [February 26, 2015, 2:46pm UTC](https://forum.legato.io/t/legato-15-01-now-available/95 "2015-02-26T14:46:32Z")
Hi everyone. Our new quarterly release of Legato, 15.01, is now available. The links on the Source (the new Dev Zone) at source.sierrawireless.com/legato/ have all been updated to point to the new downloads, and github … --- ## [Legato 14.10 released](https://forum.legato.io/t/legato-14-10-released/77)
**Author:** [@amitchell](https://forum.legato.io/u/amitchell)\ **Replies:** 10\ **Last updated:** [August 17, 2015, 8:59am UTC](https://forum.legato.io/t/legato-14-10-released/77 "2015-08-17T08:59:36Z")
Hi everyone. We have now released the 14.10 version of Legato. The links on the Dev Zone at developer.sierrawireless.com/landing/legato have all been updated to point to the new downloads, and github has been updated wi… --- ## [Sending AT-Commands failed](https://forum.legato.io/t/sending-at-commands-failed/6410)
**Author:** [@david.geffers](https://forum.legato.io/u/david.geffers)\ **Replies:** 13\ **Last updated:** [September 21, 2026, 12:33pm UTC](https://forum.legato.io/t/sending-at-commands-failed/6410 "2026-09-21T12:33:54Z")
I tried to enable sys clock via the command “AT+WEXTCLK=1,1” First i noticed that /dev/ttyAT is sometimes unreachable, so i need to wait a couple seconds and try again. When this finally works the real trouble begins. T… --- ## [Making WP7607 appear as mass storage device](https://forum.legato.io/t/making-wp7607-appear-as-mass-storage-device/4453)
**Author:** [@langestefan](https://forum.legato.io/u/langestefan)\ **Replies:** 5\ **Last updated:** [August 6, 2026, 4:30am UTC](https://forum.legato.io/t/making-wp7607-appear-as-mass-storage-device/4453 "2026-08-06T04:30:13Z")
Hi, For a usecase I want my WP7607 to appear as a mass storage device when I plug it into a host PC (or any device that supports USB mass storage). I found an article that does this on a RPI: MAKE A PI ZERO W SMART USB … --- ## [Custom Legato Image Generation](https://forum.legato.io/t/custom-legato-image-generation/7014)
**Author:** [@upsampled](https://forum.legato.io/u/upsampled)\ **Replies:** 2\ **Last updated:** [June 17, 2026, 1:30pm UTC](https://forum.legato.io/t/custom-legato-image-generation/7014 "2026-06-17T13:30:52Z")
My goal is to create a custom image for a factory WP7702 where every layer is built from known sources. So far I have been successful rebuilding the modem firmware image and the Yocto kernel/rootfs image. The remaining p… --- ## [Data session management for long lived applications](https://forum.legato.io/t/data-session-management-for-long-lived-applications/7012)
**Author:** [@Nicolas.B](https://forum.legato.io/u/Nicolas.B)\ **Replies:** 1\ **Last updated:** [April 24, 2026, 8:54am UTC](https://forum.legato.io/t/data-session-management-for-long-lived-applications/7012 "2026-04-24T08:54:35Z")
Hi, I’m looking for guidelines as how to manage AirVantage data sessions for a long lived application. The context is an FX30S application that daily send a data report to AV session at a fixed time. For that I actuall… --- ## [How to fix mangOH yellow date and time mismatch](https://forum.legato.io/t/how-to-fix-mangoh-yellow-date-and-time-mismatch/7011)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 1\ **Last updated:** [April 14, 2026, 2:31pm UTC](https://forum.legato.io/t/how-to-fix-mangoh-yellow-date-and-time-mismatch/7011 "2026-04-14T14:31:30Z")
Hello , I am getting some mTLS handshake with server application errors just due to wrong time and date by default in mangOH yellow. it is showing wrong date and time hence handshake is failing how to fix this. It is sho… --- ## [Data connection issue with external sim card](https://forum.legato.io/t/data-connection-issue-with-external-sim-card/7010)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 1\ **Last updated:** [April 9, 2026, 9:29am UTC](https://forum.legato.io/t/data-connection-issue-with-external-sim-card/7010 "2026-04-09T09:29:27Z")
root@swi-mdm9x28-wp:~# cm sim info Type: EXTERNAL\_SLOT\_1 ICCID: 89492028216021136372 Home Network Operator: Vodafone.de EID: IMSI: 26… --- ## [Glow onboard LED](https://forum.legato.io/t/glow-onboard-led/7009)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 1\ **Last updated:** [April 9, 2026, 9:24am UTC](https://forum.legato.io/t/glow-onboard-led/7009 "2026-04-09T09:24:39Z")
How to glow D500 blue LED on mangOH yellow WP7702 ? --- ## [GPIO high from legato app](https://forum.legato.io/t/gpio-high-from-legato-app/7008)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 1\ **Last updated:** [March 24, 2026, 2:47pm UTC](https://forum.legato.io/t/gpio-high-from-legato-app/7008 "2026-03-24T14:47:05Z")
Hello, I want to make gpio24 as out direction and i want to write 1 in its value. But i dont want to do this from ssh root. I want this controlling to happen from legato app. how to do this can anyone help me? --- ## [FX30S serial port does not work](https://forum.legato.io/t/fx30s-serial-port-does-not-work/7007)
**Author:** [@TheGod](https://forum.legato.io/u/TheGod)\ **Replies:** 6\ **Last updated:** [March 18, 2026, 9:26am UTC](https://forum.legato.io/t/fx30s-serial-port-does-not-work/7007 "2026-03-18T09:26:40Z")
I was using serial port DB9 on FX30 in the past. It does not work on FX30S with firmware version 21.05.0. There is no rs\_mode file (switch between RS232 and RS485). My app is fine because everything is working when I us… --- ## [GPIO complete setup](https://forum.legato.io/t/gpio-complete-setup/7005)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 3\ **Last updated:** [March 12, 2026, 1:00pm UTC](https://forum.legato.io/t/gpio-complete-setup/7005 "2026-03-12T13:00:56Z")
I want to setup GPIO pin high when a particular function from the flashed app is running in mangOH yellow and make it low when that function is completed, how to do it? Also can we use only 1 GPIO pin under export? ro… --- ## [Libcurl, Curl library error for TLS 1.2](https://forum.legato.io/t/libcurl-curl-library-error-for-tls-1-2/7003)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 1\ **Last updated:** [February 25, 2026, 1:43pm UTC](https://forum.legato.io/t/libcurl-curl-library-error-for-tls-1-2/7003 "2026-02-25T13:43:55Z")
I want to use curl library to build a TLS 1.2 connection from mangOH yellow to host but getting this error (I am including this library - #include \) please help \[25/28\] Linking C executable FAILED: /home/… --- ## [Change sim to external slot](https://forum.legato.io/t/change-sim-to-external-slot/7001)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 5\ **Last updated:** [February 18, 2026, 2:07pm UTC](https://forum.legato.io/t/change-sim-to-external-slot/7001 "2026-02-18T14:07:32Z")
on mangOH yellow by default module embedded sim is selected how to change it to external slot sim Type: EMBEDDED ICCID: 89332401000010743629 Home Network Operator: … --- ## [Global variables in Legato framework](https://forum.legato.io/t/global-variables-in-legato-framework/7000)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 1\ **Last updated:** [February 13, 2026, 1:21pm UTC](https://forum.legato.io/t/global-variables-in-legato-framework/7000 "2026-02-13T13:21:30Z")
My main.c file executes a function which is present in another .c file the functions returns a value which is present in same function file I want to access this value in main.c through a header file. Do you have any s… --- ## [How to use CLI to accept user inputs](https://forum.legato.io/t/how-to-use-cli-to-accept-user-inputs/6999)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 1\ **Last updated:** [February 9, 2026, 11:11am UTC](https://forum.legato.io/t/how-to-use-cli-to-accept-user-inputs/6999 "2026-02-09T11:11:42Z")
I am trying to build a user input and test Command line argument but getting below error /home/abharati/myWorkspace/Gitlab\_Mobildemonstrator/ziel-i4-arbeitsprojekt/sandbox/sandcom/sandbox.c:12:28: error: implicit decla… --- ## [IPC communication between different apps](https://forum.legato.io/t/ipc-communication-between-different-apps/6998)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 5\ **Last updated:** [February 4, 2026, 2:56pm UTC](https://forum.legato.io/t/ipc-communication-between-different-apps/6998 "2026-02-04T14:56:11Z")
is it possible to store a file in bundled format in one app and read the same file through another app if the apps are connected over IPC? --- ## [Legato library for SHA256](https://forum.legato.io/t/legato-library-for-sha256/6995)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 3\ **Last updated:** [January 30, 2026, 9:14am UTC](https://forum.legato.io/t/legato-library-for-sha256/6995 "2026-01-30T09:14:39Z")
Hello, Is there any library or any commands for cryptographic software development I want to use SHA256 to create a hash value for my file but it is giving me error as undefined. --- ## [Delete a file from apps directory in legato](https://forum.legato.io/t/delete-a-file-from-apps-directory-in-legato/6994)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 3\ **Last updated:** [January 28, 2026, 1:16pm UTC](https://forum.legato.io/t/delete-a-file-from-apps-directory-in-legato/6994 "2026-01-28T13:16:22Z")
is it possible to remove the file which is stored with bundle while building the app? I have encrypted the file using le\_secStore and no longer want it in app directory. bundles: { file: { \[r\] Assets/ca.p… --- ## [NTP time synchro using Legato API on FX30](https://forum.legato.io/t/ntp-time-synchro-using-legato-api-on-fx30/6992)
**Author:** [@Nicolas.B](https://forum.legato.io/u/Nicolas.B)\ **Replies:** 4\ **Last updated:** [January 26, 2026, 3:11pm UTC](https://forum.legato.io/t/ntp-time-synchro-using-legato-api-on-fx30/6992 "2026-01-26T15:11:12Z")
Hello, I’m looking for a way to use Legato API to synchronize the system time using NTP, as mentioned here. However I’m encountering issues when trying to add the binding to this service, as it seems it is not running o… --- ## [le\_secStore.api giving errors](https://forum.legato.io/t/le-secstore-api-giving-errors/6990)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 2\ **Last updated:** [January 22, 2026, 5:06pm UTC](https://forum.legato.io/t/le-secstore-api-giving-errors/6990 "2026-01-22T17:06:02Z")
Hello, I want to use Secure storge api in my application which has two processes and two components, but it is giving me undefined error. can anyone help my .adef bindings section is like below. SecStore\_Api\_process.A… [Next page](https://forum.legato.io/c/legato-application-framework/5.md?page=1)