# Legato Application Framework **URL:** https://forum.legato.io/c/legato-application-framework/5.md?page=1 [Latest](https://forum.legato.io/latest.md) · [Categories](https://forum.legato.io/categories.md) **Page:** 2 --- ## [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… --- ## [Not able to communicate over printer.api](https://forum.legato.io/t/not-able-to-communicate-over-printer-api/6988)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 5\ **Last updated:** [January 20, 2026, 12:30pm UTC](https://forum.legato.io/t/not-able-to-communicate-over-printer-api/6988 "2026-01-20T12:30:35Z")
I am trying to create a communication between two separate apps over IPC. my server app Component.cdef is saying printer.api is not recognized. can anyone help me. my apps directories are as follows. issue : when I buil… --- ## [Legato Framework Training](https://forum.legato.io/t/legato-framework-training/6982)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 4\ **Last updated:** [January 17, 2026, 3:31pm UTC](https://forum.legato.io/t/legato-framework-training/6982 "2026-01-17T15:31:40Z")
Hello Legato Team, I am in need of a legato framework training for mangOH yellow board with WP7702 module for beginners, If there are any training/tutor partners available then please let me know. Thanks, Abhishek --- ## [Legato app running- no output](https://forum.legato.io/t/legato-app-running-no-output/6972)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 2\ **Last updated:** [December 15, 2025, 10:32am UTC](https://forum.legato.io/t/legato-app-running-no-output/6972 "2025-12-15T10:32:27Z")
I am trying to run Source\_File\_98.adef which is flashed into mangOH yellow board. but it is not shoinwg output after i run logread -f | grep Source\_File\_98 Could you please tell me the reason and how to resolve this … --- ## [Httpserver example issue](https://forum.legato.io/t/httpserver-example-issue/6964)
**Author:** [@Nicolas.B](https://forum.legato.io/u/Nicolas.B)\ **Replies:** 4\ **Last updated:** [November 27, 2025, 8:31am UTC](https://forum.legato.io/t/httpserver-example-issue/6964 "2025-11-27T08:31:42Z")
Hi, I’m trying to make a small website to configure interfaces on a fx30s module. I started from the httpServer example available on github, but I’m running through issues similar with httpServer app can't link to ligh… --- ## [Setting up WP77xx Toolchain for Ubuntu 20.04](https://forum.legato.io/t/setting-up-wp77xx-toolchain-for-ubuntu-20-04/6962)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 1\ **Last updated:** [November 24, 2025, 1:34pm UTC](https://forum.legato.io/t/setting-up-wp77xx-toolchain-for-ubuntu-20-04/6962 "2025-11-24T13:34:48Z")
Where can I find the WP7702 tool chain. I am struggling a lot and I am using Ubungu 20.04 --- ## [Package as legato app](https://forum.legato.io/t/package-as-legato-app/6960)
**Author:** [@sjnk](https://forum.legato.io/u/sjnk)\ **Replies:** 1\ **Last updated:** [October 15, 2025, 1:22pm UTC](https://forum.legato.io/t/package-as-legato-app/6960 "2025-10-15T13:22:05Z")
Hello, I have legato app and I would like to package as .app and it should not have binary within it. The binary will be placed in another partition. How can I achieve this ? Below is adef content. sandboxed: false e… --- ## [Wp7605 Update error](https://forum.legato.io/t/wp7605-update-error/6956)
**Author:** [@tanaporn\_y](https://forum.legato.io/u/tanaporn_y)\ **Replies:** 7\ **Last updated:** [October 10, 2025, 4:02am UTC](https://forum.legato.io/t/wp7605-update-error/6956 "2025-10-10T04:02:46Z")
WP7605 firmware R13 generic Send the update file (xx.wp76xx.update) from tablet to wp7605 by using OTA send command to update the app but it was error. Do you have any sample code for update?? --- ## [Legato app start sequence in SDEF](https://forum.legato.io/t/legato-app-start-sequence-in-sdef/6954)
**Author:** [@sjnk](https://forum.legato.io/u/sjnk)\ **Replies:** 1\ **Last updated:** [September 30, 2025, 8:36am UTC](https://forum.legato.io/t/legato-app-start-sequence-in-sdef/6954 "2025-09-30T08:36:25Z")
Hello I have configured all the apps as autostart in adef. I observed legato starts the apps in alphabetical order (irrespective of system app or user app in .sdef) This increases apps time to wait for the dependent a… --- ## [atHelloWorld build project error](https://forum.legato.io/t/athelloworld-build-project-error/6945)
**Author:** [@ajayrawat707](https://forum.legato.io/u/ajayrawat707)\ **Replies:** 50\ **Last updated:** [September 1, 2025, 1:02pm UTC](https://forum.legato.io/t/athelloworld-build-project-error/6945 "2025-09-01T13:02:46Z")
\* Executing task: mkapp ${LEGATO\_DEF\_FILE} -s components -t ${LEGATO\_TARGET} -w ${LEGATO\_OBJECT\_DIR} -o ${LEGATO\_OUTPUT\_DIR} && update ${LEGATO\_UPDATE\_FILE} \[1/7\] Compiling C source FAILED: /home/user/Desktop/workspac… --- ## [Legato not cleaning up unpack directory](https://forum.legato.io/t/legato-not-cleaning-up-unpack-directory/6924)
**Author:** [@upsampled](https://forum.legato.io/u/upsampled)\ **Replies:** 8\ **Last updated:** [July 3, 2025, 6:22pm UTC](https://forum.legato.io/t/legato-not-cleaning-up-unpack-directory/6924 "2025-07-03T18:22:08Z")
I have run update -g and legato is still caching an unsuccessful install in unpack. The disk/flash is too small so I have to reliably clear unused files to make space for update cases. How can i remove unused files in t… --- ## [WP7605 sent size](https://forum.legato.io/t/wp7605-sent-size/6921)
**Author:** [@tanaporn\_y](https://forum.legato.io/u/tanaporn_y)\ **Replies:** 11\ **Last updated:** [May 19, 2025, 9:11am UTC](https://forum.legato.io/t/wp7605-sent-size/6921 "2025-05-19T09:11:05Z")
what is the biggest size that wp7605 can sent each time? now the speed is around 10.4kb,if I want more than 12kb how can I do? --- ## [Flash Usage on failed updates](https://forum.legato.io/t/flash-usage-on-failed-updates/6920)
**Author:** [@upsampled](https://forum.legato.io/u/upsampled)\ **Replies:** 5\ **Last updated:** [May 7, 2025, 3:03pm UTC](https://forum.legato.io/t/flash-usage-on-failed-updates/6920 "2025-05-07T15:03:03Z")
I am having an issue with the update command filling up the flash unnecessarily on failed updates. How can remove any files associated with a failed update? Prior to an update attempt the flash was at 90% usage root@p0… --- ## [SSH permission denied](https://forum.legato.io/t/ssh-permission-denied/6919)
**Author:** [@tanaporn\_y](https://forum.legato.io/u/tanaporn_y)\ **Replies:** 15\ **Last updated:** [May 7, 2025, 9:52am UTC](https://forum.legato.io/t/ssh-permission-denied/6919 "2025-05-07T09:52:19Z")
Cannot connect to root@192.168.2.2, How can I do? root@192.168.2.2: Permission denied (publickey). --- ## [Selective Suspend mode issue with Timer FD](https://forum.legato.io/t/selective-suspend-mode-issue-with-timer-fd/5916)
**Author:** [@Pankaj](https://forum.legato.io/u/Pankaj)\ **Replies:** 19\ **Last updated:** [May 6, 2025, 3:22am UTC](https://forum.legato.io/t/selective-suspend-mode-issue-with-timer-fd/5916 "2025-05-06T03:22:53Z")
Hi, Facing an issue with Selective Suspend after removing the USB OTG Cable of the device expected the device to go into Sleep mode but it is seen that the device is not entering the selective suspend mode. Attached ar… --- ## [How to diagnose rollback? (boot loop)](https://forum.legato.io/t/how-to-diagnose-rollback-boot-loop/6917)
**Author:** [@jkappes](https://forum.legato.io/u/jkappes)\ **Replies:** 2\ **Last updated:** [April 28, 2025, 11:25am UTC](https://forum.legato.io/t/how-to-diagnose-rollback-boot-loop/6917 "2025-04-28T11:25:40Z")
After applying an update I barely have enough time to do an app info before the chip starts rebooting a few times and ending up rolled back. The output of that app info shows all my apps except for tools are running and … --- ## [Wp76xx legato not running and swiflash reset not working](https://forum.legato.io/t/wp76xx-legato-not-running-and-swiflash-reset-not-working/6915)
**Author:** [@jkappes](https://forum.legato.io/u/jkappes)\ **Replies:** 3\ **Last updated:** [April 25, 2025, 8:56am UTC](https://forum.legato.io/t/wp76xx-legato-not-running-and-swiflash-reset-not-working/6915 "2025-04-25T08:56:03Z")
When I try to run swiflash -m wp76xx -r I get this output on the host: Downloading the firmware .ERROR: Firmware Download failed. Callback status 59399DONE ERROR: Firmware Download Failed and this on the target: B - … --- ## [Rollback after Probationary period is finished](https://forum.legato.io/t/rollback-after-probationary-period-is-finished/6913)
**Author:** [@nathan.raj](https://forum.legato.io/u/nathan.raj)\ **Replies:** 4\ **Last updated:** [April 22, 2025, 11:23am UTC](https://forum.legato.io/t/rollback-after-probationary-period-is-finished/6913 "2025-04-22T11:23:12Z")
Hey - looking for some advice from some more experienced people. We are using Legato 19.02 We have noticed an issue with our device undergoing a rollback after 5 sequential power failures (Power failure is defined here … --- ## [How to install p7zip-full on to MangOH Red board using Legato Dev Studio?](https://forum.legato.io/t/how-to-install-p7zip-full-on-to-mangoh-red-board-using-legato-dev-studio/4991)
**Author:** [@v4victory](https://forum.legato.io/u/v4victory)\ **Replies:** 8\ **Last updated:** [February 12, 2020, 1:42am UTC](https://forum.legato.io/t/how-to-install-p7zip-full-on-to-mangoh-red-board-using-legato-dev-studio/4991 "2020-02-12T01:42:02Z")
Hi, I am trying to install p7zip-full library on my MangOH Red board with WP7702 module using SSH of Legato Dev Studio, but don’t know what command to use I tried “su apt-get install p7zip-full” it is saying no password … --- ## [Legato and C++ 11 support?](https://forum.legato.io/t/legato-and-c-11-support/2179)
**Author:** [@karlkuhn](https://forum.legato.io/u/karlkuhn)\ **Replies:** 7\ **Last updated:** [February 20, 2025, 6:42am UTC](https://forum.legato.io/t/legato-and-c-11-support/2179 "2025-02-20T06:42:44Z")
Hi, does the standard legato project support C++ 11? If not how do I go about adding it? Do the build tools support all of the C++ 11 features? Thanks, Karl --- ## [WP77XX goes into state where no LTE data is recv until some data is sent](https://forum.legato.io/t/wp77xx-goes-into-state-where-no-lte-data-is-recv-until-some-data-is-sent/6891)
**Author:** [@upsampled](https://forum.legato.io/u/upsampled)\ **Replies:** 2\ **Last updated:** [February 5, 2025, 11:23am UTC](https://forum.legato.io/t/wp77xx-goes-into-state-where-no-lte-data-is-recv-until-some-data-is-sent/6891 "2025-02-05T11:23:01Z")
Summary Periodically the WP77XX will go into a state where it will not receive LTE data until data is sent via LTE. No Rx State When in state, device shows connected root@p240wp77xx:~# cm data info Index: … --- ## [When WP7605 is restarted, the modemDemo disappears](https://forum.legato.io/t/when-wp7605-is-restarted-the-modemdemo-disappears/6873)
**Author:** [@systemaC](https://forum.legato.io/u/systemaC)\ **Replies:** 13\ **Last updated:** [January 30, 2025, 10:54am UTC](https://forum.legato.io/t/when-wp7605-is-restarted-the-modemdemo-disappears/6873 "2025-01-30T10:54:56Z")
The following URLs and beyond are also under development. https://forum.legato.io/t/cdc-ecm-data-connection-failing/6825 Currently, we are trying to get the WP7605 with the modemDemo app installed to work on a board de… --- ## [\[Leaf\] Cannot get the Legato source by getsrc command](https://forum.legato.io/t/leaf-cannot-get-the-legato-source-by-getsrc-command/5039)
**Author:** [@ricardo.kannebley](https://forum.legato.io/u/ricardo.kannebley)\ **Replies:** 7\ **Last updated:** [January 23, 2025, 2:55pm UTC](https://forum.legato.io/t/leaf-cannot-get-the-legato-source-by-getsrc-command/5039 "2025-01-23T14:55:20Z")
Hey all. I have a fresh install of the Leaf workflow on my VM and everything went well until the leaf getsrc swi-legato command. I was able to execute the getsrc with the swi-linux but when I try with the swi-legato arg… --- ## [Async-IPC between two processes, where server crashes](https://forum.legato.io/t/async-ipc-between-two-processes-where-server-crashes/6851)
**Author:** [@ahmedelbanna096](https://forum.legato.io/u/ahmedelbanna096)\ **Replies:** 14\ **Last updated:** [December 3, 2024, 3:25pm UTC](https://forum.legato.io/t/async-ipc-between-two-processes-where-server-crashes/6851 "2024-12-03T15:25:46Z")
Hello, Currently i am working with Legato IPC in \[async\], So i have client and server in two different applications , where the client binds to the server, till now everything is OK and the client managed to connect to … --- ## [httpGet not working, cm data connect failing](https://forum.legato.io/t/httpget-not-working-cm-data-connect-failing/6824)
**Author:** [@paul.avalosar](https://forum.legato.io/u/paul.avalosar)\ **Replies:** 7\ **Last updated:** [November 5, 2024, 4:57am UTC](https://forum.legato.io/t/httpget-not-working-cm-data-connect-failing/6824 "2024-11-05T04:57:46Z")
Hi, I’m trying to run the httpGet application (and curl as well) with no success so far. My sim provider is aeris. My cm info is: Device: FX30S(WP7702) IMEI: 354723090692… --- ## [Getaddrinfo fail inside the mqttClientService](https://forum.legato.io/t/getaddrinfo-fail-inside-the-mqttclientservice/6818)
**Author:** [@Elmoo](https://forum.legato.io/u/Elmoo)\ **Replies:** 7\ **Last updated:** [October 23, 2024, 10:22am UTC](https://forum.legato.io/t/getaddrinfo-fail-inside-the-mqttclientservice/6818 "2024-10-23T10:22:30Z")
Hi, I’m using legatos built in mqttClientService to connect to an external MQTT broker. However I can only provide ip address to the mqttClient\_CreateSession. If I try to use domain for that server, I receive: mqttCli… --- ## [AVMS connection fails](https://forum.legato.io/t/avms-connection-fails/6467)
**Author:** [@sunil.somarajan](https://forum.legato.io/u/sunil.somarajan)\ **Replies:** 10\ **Last updated:** [October 23, 2024, 12:06am UTC](https://forum.legato.io/t/avms-connection-fails/6467 "2024-10-23T00:06:59Z")
I have an FX30s that connects to the network but fails to connect to AVMS It is a WP7702 and running R15 I see these errors. Is there a way I can recover this unit. Cell connection is ok and I can get IP address from c… --- ## [How to connect to aws cloud](https://forum.legato.io/t/how-to-connect-to-aws-cloud/6307)
**Author:** [@babang.parhusip](https://forum.legato.io/u/babang.parhusip)\ **Replies:** 4\ **Last updated:** [October 21, 2024, 2:44pm UTC](https://forum.legato.io/t/how-to-connect-to-aws-cloud/6307 "2024-10-21T14:44:04Z")
I did browse through legato documentation, it seems there is no straights forward approach how to connect device to cloud. Example I want to leverage AWS Embedded SDK C to connect to AWS IoT core using MQTT. How can … --- ## [Spi clock on FX30s glitching with Renfell IOT card](https://forum.legato.io/t/spi-clock-on-fx30s-glitching-with-renfell-iot-card/6799)
**Author:** [@paul.avalosar](https://forum.legato.io/u/paul.avalosar)\ **Replies:** 9\ **Last updated:** [September 26, 2024, 12:45am UTC](https://forum.legato.io/t/spi-clock-on-fx30s-glitching-with-renfell-iot-card/6799 "2024-09-26T00:45:35Z")
I’m working currently working with a spi screen using the FX30S and mangOH IOT Card P/N: 0107-10-R1.1 The spi screen is the NHD-0216CW Things seem to not be working due to glitches in the clock signal (See below). I b… --- ## [Disable Reboot on Errors](https://forum.legato.io/t/disable-reboot-on-errors/6807)
**Author:** [@simon.naegele](https://forum.legato.io/u/simon.naegele)\ **Replies:** 12\ **Last updated:** [October 10, 2024, 11:07am UTC](https://forum.legato.io/t/disable-reboot-on-errors/6807 "2024-10-10T11:07:34Z")
Hi, we are facing problems when we are unit testing our code: If too many errors occur, legato will reboot the system. Q1: is there a way to disable this functionality? Q2: how many errors or critical errors need to … [Previous page](https://forum.legato.io/c/legato-application-framework/5.md) [Next page](https://forum.legato.io/c/legato-application-framework/5.md?page=2)