Sending SMS using GPRS activated through AT command
I was searching for the exact command to send sms through GPRS rather than normal GSM and I found one article but forgotten where it was from. I tried it but I’m not sure if it works. I use Nokia 6151 with USB data cable connected to the PC. There is a “G” symbols appear on top of the mobile screen but there’s no different in speed of sending sms when I compare it.
I later found out that the transmission bandwidth for GPRS is much bigger than the normal GSM link. It should be faster if the sms is sent through the GPRS link and I suspect that the steps I did was not correct or it might be my telco doesn’t support the feature. Anyway, for those of you who might want to try it, I have the method copied down and below are the excerpt;
First of all, you need a modem that supports GPRS. You also need a provider that supports GPRS (not all providers support GRPS!)
To send an SMS through GPRS, add the following to your modem initialization string:
AT+CGATT=1;AT+CGSMS=0
The first command enables GPRS (disabled by default); the second command specifies to send SMS over GPRS instead of GSM.
You can now send SMS messages over GSM. However, if the provider does NOT support GPRS, you will receive the following error:
+CMS ERROR: 47
or +CMS ERROR: 69
You can switch it back using the following command:
AT+CGATT=0;AT+CGSMS=1
Written by admin on September 3rd, 2007 with no comments.
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