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Raven and PinPoint CDMA User Guide Version 1.12
AirLink Communications, Inc. Page 43 March 24, 2004
9 Using AT Commands
Use a terminal emulation program to connect up to the modem either locally (via the
serial port of a computer) or remotely (over an existing internet connection on a PC to
the modem at a remote location). Set up to connect to the modem by either method
described in Section 0.
Sample AT Commands
Here is an example of entering AT commands, changing some settings, saving and
resetting the modem. (Note that any command you are unsure of is explained in The AT
Commands section.)
Type AT and press the Enter key. AT<enter>
You should get a response of "0" or "OK".
To turn on echo and verbose modes, type the following: ATE1V1<enter>
You should see an "OK" response if Verbose Mode was properly activated (V1)
If you should see a “0” response, your modem is in Terse Mode and the V1 command did
not adhere.
Try ATV1 again by itself if that happens. You should see an “OK” response now.
To set the baud rate slower, (like 115200), type the following:
ATS23=115200,8N1<enter>
You should get an "OK" (if in Verbose Mode)
Note:
HyperTerm needs to be disconnected and reconnected after each baud rate change to
have it take effect.
9.1 CDMA Specific AT Commands
These AT commands are specific to the CDMA devices and networks.
Command
Description
+CTA=n[?]
Inactivity timer, in seconds. Typical CDMA network settings cause a
link to go dormant after 10 to 20 seconds of inactivity, no packets
transmitted or received. This time can be shortened to release the
physical RF link sooner when the application only transmits short
bursts. A good example is a PinPoint that transmits its location reports
periodically. A setting of +CTA=2 will release the link 2 seconds after
transmitting its report.
+HWTEMP?
Displays the internal temperature of the SB555 module in degrees
Centigrade