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 a solution.

no problem is found for WP7605 FW R17: root@swi-mdm9x28-wp:~# legato version 21.05.2.rc2_7f59219499ecf02274c4ac7575e4f8c5 root@swi-mdm9x28-wp:~# cm radio Power: ON Current Network Operator: SmarTone HK Current RAT: LTE network (LE_MRC_RAT_LTE) Status…

Please allow me to add some details regarding ping communication. We are establishing communication between a sensor equipped with WP7605 and a server that remotely controls it. Recently, we updated the firmware from Rev.13.3 to Rev.17. After starting WP7606, we executed the “cm data connect” com…

As mentioned above, i don’t see such problem So i assume there is no specification changed on ping operation Is this related specific sim card or network operator?

Hi, jyijyi-san. Please allow me to provide answers and questions related to the above thread. I work with fujimitsu-san. [Answer] This is not specific to any particular SIM card or carrier. For Japanese carriers, I tested docomo and KDDI. I tried changing carriers, but the behavior remained th…

Please allow me to add a note. Rev17 pings do not fail completely. Other TCP/UDP communications work, and while it’s unclear if TCP/UDP triggers it, ping responses can suddenly start working. When response times are slow, Rev.13 responds within 1000ms, while Rev.17 takes over 40000ms to respond. …

if UDP works, will you consider using “UDP ping”? [image] How to Do a UDP Ping in Linux Learn two ways of doing a UDP ping in Linux with nmap and netcat commands. e.g. on the Ubuntu PC server side, type “nc -u -l 12345” download the nc binary here: android…

Due to system configuration, I need to use Ping and would like to ask about Ping responses. As far as I’ve confirmed, even with Rev.17 firmware, Ping does respond, but when in suspend mode, interrupts related to Ping responses appear to be restricted. In the situation I observed, when the control…

i saw your le_timer_SetRepeat() has only set one time only, so it is only one-shot timer Didn’t you should use periodic timer to check if there is any incoming traffic? You might also need to run a wakeup_app.rar to make the module stay awake for a while after the timer has waken up the module fro…

Thank you for your response. I don’t see any particular issues with how the one-shot timer is being used. While switching to a periodic timer would allow the module to wake up more frequently, I believe it would increase power consumption. I want to keep power consumption low while still enabling…

Then does the perioidic timer help in release 17? If you enable edrx mode in at+cderxs, will there be any improvement?

Ping does not go through

jyijyi January 23, 2026, 2:42pm 16

Btw, to investigate if your legato app increases the battery consumption, you can use the nc binary and see how is the power consumption in firmware r17:

Topic		Replies	Views
Problem to call data_connection services Legato Linux distribution (Yocto project)	24	1632	December 28, 2023
Suddenly unable to enter ULPM Legato Linux distribution (Yocto project)	17	2841	March 25, 2020
WP76xx not waking up from SPM on GPIO Legato Application Framework	23	593	January 18, 2023
WP77XX goes into state where no LTE data is recv until some data is sent Legato Application Framework	2	55	February 5, 2025
I cannot receive UDP packets	1	26	December 9, 2025

Ping does not go through

Related topics