使用SIM900A通过GPRS连接OneNet平台发送GPS 信息的方法

// See if the SIM900 is ready
AT

OK
// SIM card inserted and unlocked?
AT+CPIN?

+CPIN: READY

OK
// Is the SIM card registered?
AT+CREG?

+CREG: 0,5

OK
// Is GPRS attached?
AT+CGATT?

+CGATT: 1

OK
// Check signal strength - should be 9 or higher
AT+CSQ

+CSQ: 20,0

OK
// Set connection type to GPRS
AT+SAPBR=3,1,“Contype”,“GPRS”

OK
// Set the APN - this will depend on your network/service provider
AT+SAPBR=3,1,“APN”,“CMNET”

OK
// Enable GPRS - this will take a moment or two
AT+SAPBR=1,1

OK
// Check to see if connection is correct and get your IP address
AT+SAPBR=2,1

+SAPBR: 1,1,“10.79.223.61”

OK
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