Tutorial: How to do GPRS Data Connection Using GSM/GPRS Modem
The intent of this document is to provide appropriate configuration settings for the Enabler-G modem when used on transparent and non-transparent GPRS networks. The Enabler platform is able to automate the appropriate requirements when using the PAD such that programmatic and/or manual intervention is not required.
Overview:GPRS service providers have two distinct methods of negotiating with mobile devices in order for them to obtain an IP address. This construct is known as transparency. A network is either transparent or non-transparent in architecture. The transparency determines if the mobile platform is required to provide a username and password to successfully connect to the network. A transparent network will not require a username and password, whereas, a non-transparent network will.
Enfora has designed a Packet Assembler/Disassembler (PAD) interface to facilitate connections to platforms that do not have an IP stack. The PAD can be fully automated to provide a network connection upon power up. Please see PAD Configuration and Use for detailed information concerning the PAD.
If the PAD is being used on a non-transparent network, it needs to provide a username and password to properly connect. The module will need to provide the authentication protocol required along with the username and password parameters. The following command provides this capability:
The following command sets the negotiation type.
<pt> 0 -No authentication (ignore login + pwd)
GSM0000AN012 Page 1
The following command sets the authentication format and parameters.
<n> 0 -Inputs specified in Hexadecimal
1 -Inputs specified in ASCII
<Authentication format>Authentication format (ASCII),
Username: Maximum 16 bytes ASCII string.
Password: Maximum 16 bytes ASCII string.
Protocol Configuration Optionspecified in Hex value; maximum size is equal to 256 bytes.
<cid> 0– The new username, password, and protocol type is to be applied to all context Activation.
1– Context ID zero.
2– Context ID one.
Link: GPRS Pads Configuration And Usage
Link: Documentation and AT Command Set for Enfora GSM Modem
Link: Testech M2M Solutions -> we provide complete M2M and SMS/GPRS Development services and Remote Terminal Units, Water/Weather sensors.
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