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Requirements:
We will use the scenario shown in the figure below.
The screenshot below shows the configuration on the ACEmanager > Services > SMS screen. You can set the SMS mode as “Gateway or Control and Gateway”. Select “IP” in the SMS Destination field. In this example, the Local Host port and the ALEOS port have both been set to UDP Port 17431. You can use different UDP port values as long as the chosen ports are not in use by other applications or blocked by any firewall.
Refer to the ALEOS Software Configuration User Guide for a full explanation of the IP protocols used to send SMS messages. Based on the example in the ALEOS User Guide, the following example sends the message “THIS IS A TEST:” to the phone number 6046556677. This example uses the default delimiters matching the “Message format configuration”.
THIS IS A TEST Equivalent ASCII HEX (14 bytes): 54 48 49 53 20 49 53 20 41 20 54 45 53 54
Message would be:
<<<16046556677,ASCII,14,5448495320495320412054455354>>>
On the host computer, we have installed a program called UDP Test Tool (available for free from www.simplecomtools.com). For this example, we are using UDP Port 17431 on both the remote and host sides of the UDP Test Tool. The following screen shot shows the UDP Test Tool and command sent:
From the UDP Test Tool standpoint, the remote IP address is the AirLink device’s local IP — 192.168.13.31. The Local IP Address field is automatically set to whatever DHCP IP address the AirLink device has assigned to the computer. If the AirLink device is in its default configuration, then the Local IP Address that appears in the UDP Test Tool window is 192.168.13.100. We set the Remote and Host Port values to be 17431. The next step is to copy and paste the ASCII message referenced in the previous section into the Edit/Send Data box on the left side of the UDP test tool, and click the “Send” button.
The AirLink device should respond to the message sent from the UDP Test Tool with an “ACK0” message indicating that ALEOS has received the UDP message correctly and it will be sent out the AirLink device’s cellular interface as an SMS message. We have a list of other possible ALEOS Acknowledge messages at the end of this article.
Notes: * To convert text to ASCII, use one of the many ASCII generator sites on the Internet such as http://rishida.net/tools/conversion/. * It is also possible to use other UDP applications instead of the UDP Test Tool. For example, you can use “Clear Terminal” available from: http://www.clearconnex.com/content/clearterminal
1) Start by sending a message to the phone number of your AirLink device itself. The ACEmanager Services > SMS screen will display the incoming message.
Recipient B displays:
2) Acknowledgment messages. It is a common mistake to introduce spaces in the UDP message. These are some of the types of Acknowledgement from the AirLink device to the host computer. Refer to ALEOS User Guide for SMS IP protocol for an explanation.
0 Message successfully queued to be sent.201 Parse Error on field #1 (Start delimiter)202 Parse Error on field #2 (Phone number and separator)203 Parse Error on field #3 (Data type and separator)204 Parse Error on field #4 (Payload length and separator)205 Parse Error on field #5 (Message and End)
3) The ALEOS “ACK0” message is received, but the actual SMS message is not sent. Please refer to the troubleshooting section of Sending SMS with AT command in this AirLink forum. 4) SMS messages are sent, but ACK messages are not received. Verify that the UDP application is using the correct port following “ALEOS port” and “Local host” ports as listed in ACEmanager. Verify that they are not blocked by a Firewall. Open the “Wireshark” application on the computer and monitor the UDP messages between the computer and the host computer.