Sending Messages

Sending from APRS to SMS

Sample message generated using Kenwood TM-D710

To send a message from an APRS station, simply address your message to SMSGTE with the following format:

 @<number> <message>

The @ symbol signifies that the following characters represent the destination for the message while <number> represents the sms number or associated alias the message should be sent to. All words following the destination will form the body of the message.

Example:

 To: SMSGTE
 @6135551234 No cell coverage here, ping me on radio 

When the message is delivered to the destination SMS number (usually a cell phone), the message will appear as follows:

 @VR4XXX-10 No cell coverage here, ping me on radio

Of course, the callsign at the start of the message will be your callsign. The originating number will be the gateway’s number for your region.

Sending from SMS to APRS

To send a message from SMS to an APRS station, address your message to the gateway number with the following format:

 @<callsign> <message> 

The @ symbol signifies that the following characters represent the destination for the message while <callsign> represents the callsign and SSID the message should be sent to. All words following the destination will form the body of the message.

Example:

 To: 2015551234
 @VE3OTB-10 Did you forget your cellphone? 

The message delivered to the APRS station will appear as follows:

 6135551234 Did you forget your cellphone?

Please note that the gateway telephone numbers have not been published here to prevent spam messages being sent into the APRS network. You will learn the gateway’s number when you send your first message from APRS to SMS.

Conversations initiated by an SMS user will only be permitted to callsigns that have previously used SMSGTE. This has been implemented both to mitigate the potential for SPAM and to simplify the parsing of SMS messages received by SMSGTE. Messages are stored for 24 hours.

Request Delivery Confirmation

A user may request delivery confirmation by adding a question mark (?) to the end of the callsign or SMS number. If the message is destined for APRS, a confirmation message will be sent to the SMS user only once an Ack was received on APRS. If the message is destined for SMS, a confirmation message will be sent when SMSGTE confirmatin from the SMS service. Confirmation is intended to verify that the message was delivered via the APRS network. Confirmation requests work with raw phone numbers and aliases. Use the following format:

From APRS:

 @<number>? <message> 

Example message body:

@6135551212? My car broke down, can you come help me?
@mywife? My car broke down and my cell is dead.

From SMS:

@<callsign>? <message>

Example message body:

@VE3OTB-9? Is your radio on?

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