TCP/IP testing with Simcom SIM7500 and SIM7600 Modules

Steps to test TCP/IP with SIM7500and SIM7600 Modules

Verify that the device is registered with the network provider
Set active PDP context’s profile number using the AT+CSOCKSETPN comamnd
Set for non-transparent TCP/IP application mode using the AT+CIPMODE command
Ge the local IP address using the AT+IPADDR command
Start the TCP connection with AT+CIPOPEN command
Once TCP connection has been successfully established, send data using the AT+CIPSEND command.

AT Command Tester Tool provides an interface to test the TCP connection with the Simcom modules. Enter the APN information. Use the default server/port or enter the server you want to connect.

TCP function can also be tested with script mode in the AT Command Tester tool.

Try the script in AT Command Tester tool.

//Script: simcom_tcp_7500_7600.at
//Use this script to test TCP AT commands with Simcom modules.
//This script can be used on following Simcom modules-
//SIM7500X, SIM7600X

//Close any previous connection
AT+NETCLOSE

WAIT=2

//Set the PDP profile number to use
AT+CSOCKSETPN=1

WAIT=1

//Configure for non-transparent mode
AT+CIPMODE=0

WAIT=2

//Open the socket
AT+NETOPEN

WAIT=5

//Get the IP address
AT+IPADDR

WAIT=2

//Start the TCP connection
AT+CIPOPEN=0,"TCP","postman-echo.com",80


WAIT=3

//Send client data
AT+CIPSEND=0,46

WAIT=2

//Send the HTTP formatted data
GET https://postman-echo.com/ip HTTP/1.0

//Send the CTRL+Z character
^z

Output of the script in the AT Command Tester tool.

AT+NETCLOSE

TCP connection is closed by remote server

OK

+NETCLOSE: 0
TCP connection is closed by remote server

AT+CSOCKSETPN=1

OK
AT+CIPMODE=0

OK
AT+NETOPEN

OK

+NETOPEN: 0
AT+IPADDR

+IPADDR: 10.162.227.83

OK
AT+CIPOPEN=0,"TCP","postman-echo.com",80

OK

+CIPOPEN: 0,0
TCP connection success

AT+CIPSEND=0,46

>
GET https://postman-echo.com/ip HTTP/1.0


OK

+CIPSEND: 0,46,46

RECV FROM:52.7.244.138:80
+IPD367
HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
Date: Thu, 21 Mar 2019 06:18:22 GMT
ETag: W/"15-UJIDSLObc+wQyi2G1XV4ugbseug"
Server: nginx
set-cookie: sails.sid=s%3A7K1ksD52EVuupeW5SmKPNe9EJHdN0pdg.S3bLtUt0qHdkasbXzrxQxA7HbLG64q%2BiAv1jghwaBrQ; Path=/; HttpOnly
Vary: Accept-Encoding
Content-Length: 21
Connection: Close

{"ip":"216.3.13.179"}
+IPCLOSE: 0,1
TCP connection is closed by remote server

Keywords: Module , M2M , GPRS , 3G , through AT commands,