AT Commands

First Program in Embedded system: AT Commands: Make GPRS Connection (AT Commands) 1. Example using Wavecom WipSoft modems Green: optional * Only enter the next command if the ...

AT Commands

Make GPRS Connection (AT Commands)

1. Example using Wavecom WipSoft modems

Green: optional

* Only enter the next command if the previous command receives a positive reply from the modem (e.g. OK)

AT+CFUN=1 // reset modem functionality

AT+WOPEN=1 // only for first time using WIP command set

AT+CMEE=1 // CME error mode – print out numeric error codes

AT+COPS=0 // Set auto mode first (needed for resetting SIM)

AT+COPS=3,2 // Set APN format to numeric

AT+COPS=1,2,”(netid)” //manal select APN using numeric format, netid e.g. 45020

AT+CGATT=0 // network detach

AT+CGATT=1 //network attach

AT+WIPCFG=1 // start IP stack

AT+WIPBR=1,6 // open GPRS bearer

AT+WIPBR=2,6,11,”(apnserv)” // set APN name  apnserv e.g. “peoples.net”

AT+WIPBR=4,6,0 // start GPRS bearer

AT+WIPBR=3,6,15 // Read obtained Dynamic IP

AT+WIPCREATE=2,1,(tcpserv),(tcpport) // Create GPRS socket tcppport e.g. 7001, tcpserv e.g. 202.168.138.2

AT+WIPDATA=2,1,2 // switch to data mode to receive data streams

2. Example using Wavecom eDSoft modems

AT+CFUN=1 // reset modem functionality

AT+CMEE=1 // CME error mode – print out numeric error codes

AT+COPS=0 // Set auto mode first (needed for resetting SIM)

AT+COPS=3,2 // Set APN format to numeric

AT+COPS=1,2,netid //Manal select APN1 using numeric format

AT+COPS? // Get current APN

AT+CGATT=0 // Network detach

AT+CGATT=1 //Network attach

AT#GPRSMODE=1 // GPRS configuration

AT#DLEMODE=0 // No specific process is needed on ETX characters

AT#APNSERV=”(apnserv)” // Set APN name  apnserv e.g. “peoples.net”

AT#CONNECTIONSTART // Establish connection

3. Example using Telit modems

AT+CMEE=2 // CME error mode – print out text error messages instead of numeric codes

AT#PKTSZ=30 // Data packet size

AT#DSTO=20

AT#SKTTO=200 //# socket inactivity timeout (second)

AT#SKTCT=20 // TCP connection timeout

AT+COPS=3,2 // Set APN format to numeric

AT+CGATT=1 // Network attach

AT#GPRS=1 // Establish GPRS

AT+COPS? // Get current APN

AT+CGDCONT=1,”IP”, “(apnserv)”, “0.0.0.0″,0,0 // set APN name  apnserv e.g. “peoples.net”

AT#SKTD=0,(tcpport),(tcpserv),255 // Establish connection   tcppport e.g. 7001, tcpserv e.g. 202.168.138.2