Writing SMS. CalAmp Landcell SMC GPRS

If you want to receive cell broadcast messages activate the URC presentation for CBS with

AT+CNMI

and subscribe to a CBS channel with

AT+CSCB

.

The

AT^SM20

command specifies different modes of responses returned when sending and writing short messages: AT^SM20=,0 causes the ME return "+CMS ERROR: <err>" when writing or sending of short messages fails. AT^SM20=,1 (factory default) causes the ME to return ―OK‖ no matter whether or not the SMS command was succesfully executed.

Writing SMS

AT+CMGF Select SMS message format

AT^SMGO Set or query SMS overflow presentation mode or query SMS overflow

AT+CSMP Set SMS text mode parameters

AT+CMGW

Write SMS message to memory

Reading SMS

AT+CMGL List SMS messages from preferred storage

AT^SMGL List SMS messages from preferred storage (does not change status)

AT+CMGR Read SMS message

AT^SMGR

Read SMS message (does not change status)

Deleting SMS

AT+CMGL List SMS messages from preferred store (optional)

AT+CMGD

Delete SMS message (mandatory)

Sending SMS

AT+CMGS

Send SMS message

AT+CMSS

Send SMS message from storage

Receiving SMS

AT+CMGR

Read SMS message

AT+CNMA New SMS message acknowledge to ME/TE, only phase 2+

SMS Status Report

There are two ways to activate the presentation of status reports:

- When using PDU mode, status reports can be enabled with the first octet of the PDU.

- When using text mode, you can switch it on with the first parameter (<fo>) of AT+CSMP

To be notified when a status report is received, activate the URC presentation with AT+CNMI.

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