LX40 SMS via UDP, no ACK received

[Elexel]

Setting up a new LX40 device.
ALEOS Software Version: 4.18.1

I’m testing the sending and receiving of SMS via UDP using a test tool similar to the one mentioned here:

https://source.sierrawireless.com/resources/airlink/forum_topics_and_questions/how-to-test-sending-sms-messages-with-airlink-ip-protocol

Using the UDP test tool I can send an SMS message which is received on my phone.

If I respond to the message on my phone, the incoming message appears in the UDP test app.

But when I send the SMS, I do not get an ACK back from the LX40. Seeing that I do get the incoming message in the UDP test tool, it appears that the LX40 is correctly sending messages to me, just not the ACK

In the test tool, newer messages at the top, green is the sent SMS, red is received SMS

Here is the Airlink config

I confirmed the same behavior in code, the UDP test tool just confirmed it.

Edit: I also tried multiple SIMs from different carriers with the same result (TMobile and AT&T)

[jerdung]

Hi @Elexel,

Welcome to our community!

Please provide full log file and template file with me.

***Here are the instructions for obtaining the log file and template file:

1. The configuration template file can be found in ACEmanager → Template. Provide any desired name for the Template Name, and then press Download to retrieve the template file.

2. Obtain the log file:
   a. Go to AceManager > Admin > Log > Configure Logging.

   Set all log levels to DEFAULT (NOTICE).
   Set Linux Syslog to DISPLAY.
   Then select Apply.

   b. Reboot the gateway.
   c. Reproduce the issue
   d. Go to Admin → View log → Download Logs.

Thanks,

[Elexel]

I just recently figured out the issue.

This example is not correct:

https://source.sierrawireless.com/resources/airlink/forum_topics_and_questions/how-to-test-sending-sms-messages-with-airlink-ip-protocol

There is one small note in the device manual that says the ACK is sent to the port of the endpoint that sent the SMS message. This may or may not be the same as the port configured in the modem UI (local host port).

The local host port is only used to send incoming SMS messages