SMS AT commands

The following commands list contains SMS-related AT commands.

SMS support #XSMS

The #XSMS command supports functionalities for sending and receiving SMS messages.

Set command

The set command allows you to start or stop SMS, as well as send SMS text. Only GSM-7 encoding is supported, 8-bit and UCS2 encodings are not supported.


  • The <op> parameter can accept one of the following values:

    • 0 - Stop SMS

    • 1 - Start SMS, ready to receive

    • 2 - Send SMS

  • The <number> parameter is a string. It represents the SMS recipient’s phone number, including the country code (for example +81xxxxxxx).

  • The <text> parameter is a string. It is the SMS text to be sent.

Unsolicited notification

This is the notification syntax when an SMS message is received:

#XSMS: <datetime>,<number>,<text>
  • The <datetime> value is a string. It represents the time when the SMS is received. It has a format of “YY-MM-DD HH:MM:SS”.

  • The <number> value is a string. It represents the SMS sender’s phone number.

  • The <text> value is a string. It represents the SMS text that has been received.

When receiving concatenated SMS messages, there will be only one notification.



at#xsms=2,"+8190xxxxxxxx","SLM test"


#XSMS: "21-05-24 11:58:22","090xxxxxxxx","Tested OK"



#XSMS: "21-05-24 13:29:47","090xxxxxxxx","0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

Read command

The read command is not supported.

Test command

The test command tests the existence of the command and provides information about the type of its subparameters.



Response syntax

#XSMS: <list of op value>,<number>,<text>


#XSMS: (0,1,2),<number>,<text>