Sending and receiving sms

SMS

Now we will try to send and receive messages using our VIBE2. For this you have to follow these steps:

Sending a message

• Insert a micro SIM card in the 6 pin micro sim connector.
• Power the board using a 5V (max 5A) DC adapter.
• Log in to the VIBE2 using any of the techniques explained in this document.
• Set VIBE2 into AT commands mode by using

$ minicom -D /dev/ttyUSB0

NOTE: Verify the USB port as it is different for different modems.

- Now execute the following AT commands to send a message:

AT
OK

This checks whether AT commands are responding or not.

AT+COPS?

This gives the details of your Internet service provider.

AT+CSQ

This signify the signal strength of your network.

AT+CMGF=1

This command is used to set the format of short message in TEXT mode.

AT+CMGS=”PHONE NUMBER TO WHOM MESSAGE IS TO BE SEND”  <CR>
“HELLO”
<Ctrl-Z>

This command is used to send short messages.

<CR>-carriage return

Receiving a message

AT
OK

AT+CMGF=1

AT+CMGL=”ALL”

This command lists all the available messages stored in the memory.

AT+CMGR=1

This command shows a particular message(in this case message stored at index 1 in the memory will be displayed)

AT Commands Manual

The AT Command Manual for the 2G modem can be downloaded from here

The AT Command Manual for the 3GH-A/B/C and 3GC-A type Modules can be downloaded from WCDMA here

The AT Command Manual for the 3GH-D Module is available on request. Contact Yantrr support.