# Latest **URL:** https://forum.legato.io/latest.md [Latest](https://forum.legato.io/latest.md) · [Categories](https://forum.legato.io/categories.md) --- ## [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… --- ## [Regarding Connection Issues with the WP7605](https://forum.legato.io/t/regarding-connection-issues-with-the-wp7605/7015)
**Author:** [@satou.hiroyuki](https://forum.legato.io/u/satou.hiroyuki)\ **Replies:** 16\ **Last updated:** [September 13, 2026, 9:26am UTC](https://forum.legato.io/t/regarding-connection-issues-with-the-wp7605/7015 "2026-09-13T09:26:59Z")
Dear Support Team, We have observed behavior that appears to be a malfunction with the WP7605. Please advise on how to resolve this issue. ・Devices running the latest firmware (Rev17) experience frequent communication … --- ## [Downgrade R17 to R13.1](https://forum.legato.io/t/downgrade-r17-to-r13-1/6751)
**Author:** [@vyoma](https://forum.legato.io/u/vyoma)\ **Replies:** 3\ **Last updated:** [September 6, 2026, 1:22am UTC](https://forum.legato.io/t/downgrade-r17-to-r13-1/6751 "2026-09-06T01:22:10Z")
Module: WP7608 Background: some devices are in the field that are built with R13.1 My testing setup with the R17. I want to degrade to R13.1. I want to test the same scenario of the field device. I tried the office ve… --- ## [WHCP USB driver](https://forum.legato.io/t/whcp-usb-driver/7016)
**Author:** [@jack.heaffey](https://forum.legato.io/u/jack.heaffey)\ **Replies:** 2\ **Last updated:** [September 4, 2026, 1:41am UTC](https://forum.legato.io/t/whcp-usb-driver/7016 "2026-09-04T01:41:00Z")
Hi, Since a recent Windows 11 update, my PC now blocks the WP76xx USB driver, with the following error message: "This driver has been blocked Swcdcecm62\_64.sys does not pass the Windows driver policy." Are there plan… --- ## [Libiio.so correct settings for use](https://forum.legato.io/t/libiio-so-correct-settings-for-use/7019)
**Author:** [@pmark](https://forum.legato.io/u/pmark)\ **Replies:** 2\ **Last updated:** [August 7, 2026, 12:42pm UTC](https://forum.legato.io/t/libiio-so-correct-settings-for-use/7019 "2026-08-07T12:42:46Z")
I am trying to use libiio that is in the 3rdParty folder, everything seems to compile and install fine but can’t debug ? sshWrapper: /legato/systems/current/apps/hubApp/read-only/bin/MCExe: error while loading shared l… --- ## [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 … --- ## [Pseudo Abort while building R15.0.2.001.BP2 for FX30 CAT m1](https://forum.legato.io/t/pseudo-abort-while-building-r15-0-2-001-bp2-for-fx30-cat-m1/6194)
**Author:** [@billzhou](https://forum.legato.io/u/billzhou)\ **Replies:** 2\ **Last updated:** [July 21, 2026, 1:27am UTC](https://forum.legato.io/t/pseudo-abort-while-building-r15-0-2-001-bp2-for-fx30-cat-m1/6194 "2026-07-21T01:27:03Z")
I am trying to build image for swi-linux-src(swi-fx30-catm\_4.0.0.beta │ Release R15.0.2.001.BP2 + Legato 21.05.0) on my Ubuntu 18.04.6. I got an Pseudo Abort problem, can anyone advise a fix? The direct console error me… --- ## [WP7607 Libsqlite Error In Legato application](https://forum.legato.io/t/wp7607-libsqlite-error-in-legato-application/7017)
**Author:** [@elmanju07](https://forum.legato.io/u/elmanju07)\ **Replies:** 3\ **Last updated:** [July 17, 2026, 7:39am UTC](https://forum.legato.io/t/wp7607-libsqlite-error-in-legato-application/7017 "2026-07-17T07:39:29Z")
I am facing the an issue supervisor\[1258\]/supervisor T=main | app.c CreateFileLink() 2277 | Failed to create link at ‘/usr/lib/libsqlite3.so.0’ in app ‘GPS’ I have also verified the SQLite library being used in our bui… --- ## [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… --- ## [No ipv4 address](https://forum.legato.io/t/no-ipv4-address/7013)
**Author:** [@jack.heaffey](https://forum.legato.io/u/jack.heaffey)\ **Replies:** 8\ **Last updated:** [May 7, 2026, 8:42pm UTC](https://forum.legato.io/t/no-ipv4-address/7013 "2026-05-07T20:42:02Z")
Hi, I have a WP7610 connected to AT&T. There is an intermittent issue whereby after starting a data connection using le\_data\_Request, the cell module acquires an ipv6 address but not an ipv4 address. Once the cell modul… --- ## [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… --- ## [Ping does not go through](https://forum.legato.io/t/ping-does-not-go-through/6975)
**Author:** [@fujimitsu](https://forum.legato.io/u/fujimitsu)\ **Replies:** 20\ **Last updated:** [April 21, 2026, 10:38am UTC](https://forum.legato.io/t/ping-does-not-go-through/6975 "2026-04-21T10:38:47Z")
After establishing a data connection with cm data connect, the server stops responding to ping after a few seconds. Since ping responses continue in R13.3, we suspect this is an issue specific to R17. Please advise on … --- ## [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… --- ## [atServerHelloWorld not working](https://forum.legato.io/t/atserverhelloworld-not-working/7004)
**Author:** [@ilan](https://forum.legato.io/u/ilan)\ **Replies:** 1\ **Last updated:** [March 10, 2026, 6:14am UTC](https://forum.legato.io/t/atserverhelloworld-not-working/7004 "2026-03-10T06:14:12Z")
I’m trying to run the basic atServerHelloWorld example on a WP7607-1 running firmware R17.1 / Legato 21.05.2. The app builds and deploys successfully. Logs confirm AT+HELLOWORLD is registered with atServerDaemon: atSer… --- ## [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/… --- ## [Legato extension for VS code](https://forum.legato.io/t/legato-extension-for-vs-code/7002)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 1\ **Last updated:** [February 23, 2026, 9:16am UTC](https://forum.legato.io/t/legato-extension-for-vs-code/7002 "2026-02-23T09:16:59Z")
Somehow my legato is completely gone and i am getting this error,could you please guide how to resolve this. my complete development workd is stopped due to this. earlier legato plugin was working fine for me on the same… --- ## [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? --- ## [Cm data connect persistant after reboot](https://forum.legato.io/t/cm-data-connect-persistant-after-reboot/6997)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 6\ **Last updated:** [February 3, 2026, 8:38am UTC](https://forum.legato.io/t/cm-data-connect-persistant-after-reboot/6997 "2026-02-03T08:38:52Z")
I need my data connection also need to be persistant when i connect my board to laptop for now. I am able to automate the process till NAT rules and iptables, so only i have to use ‘cm data connect’ through ssh to get i… --- ## [How to make ip\_forward as 1 by default after reboot](https://forum.legato.io/t/how-to-make-ip-forward-as-1-by-default-after-reboot/6996)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 4\ **Last updated:** [February 2, 2026, 3:09pm UTC](https://forum.legato.io/t/how-to-make-ip-forward-as-1-by-default-after-reboot/6996 "2026-02-02T15:09:46Z")
root@swi-mdm9x28-wp:~# cat /proc/sys/net/ipv4/ip\_forward 0 I have manually set it to 1 so I can use mangOH yellow internet on my laptop. but it is again set up to 0 after reboot. now to make it persistant. is there any… --- ## [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… --- ## [Not able to read/write anything in appsWriteable](https://forum.legato.io/t/not-able-to-read-write-anything-in-appswriteable/6993)
**Author:** [@fsdabharati](https://forum.legato.io/u/fsdabharati)\ **Replies:** 5\ **Last updated:** [January 27, 2026, 4:11pm UTC](https://forum.legato.io/t/not-able-to-read-write-anything-in-appswriteable/6993 "2026-01-27T16:11:17Z")
Has anyone read/written any file in apps sandbox? I need help. I am not able to write anything in appswriteable under my app. it is showing me path is not correct. What should I do? [Next page](https://forum.legato.io/latest.md?page=1)