At Command Control GPRS module to implement TCP connection steps
Source: Internet
Author: User
At/R at + CCID/R // check whether a SIM card is installed
At + cgmr/R // check software version. For Versions later than 5.0, the GPRS function is available to support at + CSQ/R // check the signal quality and determine whether the system can log on to the network; if a signal between 10-31 and 0 is returned, the process continues. If the signal is 99,99, the module should constantly search for the network. At + cgclass = "B"/R // set the module work type at + cgdcont = 1, "ip", "cmnet"/R at + cgatt = 1 // activate PDP, obtain the IP address at + cipcsgp = 1, "cmnet"/R at + cipstart = "TCP", "10.56.12.207 ", "2020"/R at + cipsend/r> // return ">", enter the data to be transmitted, and then send Ctrl + Z, sending OK is returned if the data to be sent is successfully sent to the server of the specified IP address.
At + cipclose/R // OK is returned only when TCP/UDP is in the connect OK status. Otherwise, error at + cipshut/R // is returned when mobile is disabled.
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