Maestro GSM100 Quick Manual - Gsm & Gprs Modem
11
DS100-1 May ’07
www.rfsolutions.co.uk
©
2007 REG No 277 4001, ENGLAND.
Page 11
GSM & GPRS Modem
3.2. Basic Operation :
Followings are examples of some AT commands. Please refer to the AT Command guide for a full
description.
Note : Issue AT+CMEE=1 to have extended error code (+CME ERROR)
Description
AT commands
Modem response
Comments
AT+CREG?
CREG=
Modem registered to the network
CREG=
Registration lost, re-registration attempt
Network Registration
Checking
CREG=
Modem not registration on the network, no
registration attempt
Receiving signal
strength
AT+CSQ
+CSQ: 20,0
The first parameter has to be at least 15 for normal
communication
RING
An incoming call is waiting
ATA
Answer the call
Receiving an
incoming call
OK
ATD1234567;
Don’t forget the « ; » at the end for « voice » call
OK Communication
established
CME ERROR : 11
PIN code not entered (with + CMEE = 1 mode)
CME ERROR : 3
AOC credit exceeded or a communication is already
established
Make a call
CME ERROR : 10
Cannot read the SIM card
ATD 112;
Don’t forget the « ; » at the end for « voice » call
Make an emergency
call
OK
Communication loss
NO CARRIER
ATH
Hang up
OK
AT+CPIN=1234
OK
PIN Code accepted
+CME ERROR : 16
Incorrect PIN Code (with +CMEE = 1 mode)
Enter PIN code
+CME ERROR : 3
PIN already entered (with +CMEE = 1 mode)
AT&W
Saves parameters in
non-volatile memory
OK
The configuration settings are stored