Query whether gprs modules can connect to the Internet

Connect serial of GPRS modules with serial of PC, open USR-GPRS-DTU software to set AT command.

1.Query whether GPRS module can identify SIM card

[Send] : AT+CIMI<CR>
[Receive] : 460001142971927
[Note] : obtain IMSI

The command is aimed to reading or identifying IMSI of SIM card
Query whether GPRS module can identify SIM card

2.Query whether GPRS module can connect to the Internet

[Send] : AT+COPS?<CR>
[Receive] : +COPS:0,0 “China Mobile”
[Note] : query the network registration information
query the network registration information

3.Query whether GPRS module can connect to the server

[Send] : AT+CINET?<CR>
[Receive] : +CINET:1,0,0,0
[Note] : query the current network connection status
query the current network connection status

4.Query signal intensity

[Send] : AT+CSQ<CR>
[Receive] : +CSQ: 18,99
[Note] : query the current signal intensity [Receive] : signal intensity,completing rate
query the current signal intensity