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Chapter 4 – Other Commands
Multi-Tech Systems, Inc. MultiModem Wireless EDGE, GPRS, & CDMA Modem with Bluetooth (S000390B) 15
Chapter 4 – Other Commands
Checking the Signal Quality of the Wireless Modem
• Type AT+CSO
Modem responds with the received signal strength (rssi).
Checking the Identity of the Wireless Modem
The command used in this example is ATI. AT is followed by the capital letter i.
• Type ATI0 (The command ends in zero).
Manufacturing data displays. Example: xxxxxxxx Modem 800 1900
• Type ATI3.
Software version displays. Example: S/W VER: xxxxx
• Type ATI6.
Capability data displays. Example: +CGSM, +CIS707, .....
Checking the Network Registration and Roaming Status of the Wireless Modem
• Type AT+CREG?
The modem will respond in one of the following ways:
+CREG: 0,0 This tells you the modem is not registered on any network.
+CREG: 0,1 This tells you the modem is registered on the home network.
+CREG: 0,5 This tells you the modem is registered on a network but it is roaming.
Disabling Flow Control of the Bluetooth Interface
• Using terminal screen with flow control enabled, issue commands to turn off flow control..
Send: ATSW22,3,1,0 <cr_lf> // Set PIO3 as output and do not store in flash
Reply: OK<cr_lf>
Send: ATSW23,3,1,0<cr_lf> // Set PIO3 output high and do not store in flash
Reply: OK<cr_lf>
• To store setting in flash:
Send: ATSW22,3,1,1 <cr_lf> // Set PIO3 as output and store in flash
Reply: OK<cr_lf>
Send: ATSW23,3,1,1<cr_lf> // Set PIO3 output high and store in flash
Reply: OK<cr_lf>
Now you can communicate with the Bluetooth device with flow control turned off.
Configuring DTR Reset Function on the Bluetooth Interface
IMPORTANT: These commands should be used only when the Bluetooth is running as a Master
• Using terminal screen, issue commands so that when the DTR goes off, the adapter is reset:
Send: ATSW22,6,1,0 <cr_lf> // Set PIO6 as output and do not store in flash
Reply: OK<cr_lf>
Send: ATSW23,6,0,0<cr_lf> // Set PIO6 output low and do not store in flash
Reply: OK<cr_lf>
• To store setting in flash:
Send: ATSW22,6,1,1 <cr_lf> // Set PIO6 as output and store in flash
Reply: OK<cr_lf>
Send: ATSW23,6,0,1<cr_lf> // Set PIO6 output low and store in flash
Reply: OK<cr_lf>
Now you can communicate with the Bluetooth master device; and when wireless connection is terminated (DTR
goes off), the Bluetooth adapter will reset.
Disabling DTR Reset Function on the Bluetooth Interface
This command is issued if you change the Bluetooth from running as a Master to running as a Slave. The DTR reset
function cannot be used in Slave mode.
• Disable Bluetooth device to reset when DTR goes off:
Send: ATSW22,6,0,1 <cr_lf> // Set PIO6 as input and store in flash
Reply: OK<cr_lf>