\nHuawei modules have embedded TCP\/UDP stack. This lets us create IP connections which are needed for common applications like connecting to a remote server, email, FTP, HTTP etc.
\nIn the TCP\/UDP tab of the AT Command Tester, you can easily test TCP connections.<\/p>\n
TCP Connection<\/strong> OK Checking if device is already connected...<\/p>\n AT+CGACT?<\/p>\n +CGACT: 1,1 OK OK ^IPSTATE: 7,0,2 OK OK<\/p>\n Initializing the IP connection... ^MODE: 5,7<\/p>\n OK<\/p>\n ^MODE: 5,4<\/p>\n Checking initialization status...<\/p>\n AT^IPINIT?<\/p>\n ^IPINIT: 1,\"10.104.133.125\",\"bluevia.movistar.es\",\"80.58.61.250\",\"80.58.61.254\"<\/p>\n OK AT^IPOPEN=1,\"TCP\",\"www.m2msupport.net\",80<\/p>\n OK ^IPOPEN: 1,\"TCP\",39855,\"74.124.194.252\",80,3,1220<\/p>\n OK Link ID-> 1 ^IPOPEN: 1,\"TCP\",39855,\"74.124.194.252\",80,3,1220<\/p>\n OK Link ID-> 1 How to send data to remote server?<\/strong> <\/code> ” 3a ^IPSEND: 1<\/p>\n OK<\/p>\n ^IPSTATE: 1,0,0<\/p>\n <\/p>\n TCP\/UDP Testing for Simcom Modules<\/strong><\/p>\n SIMCOM modules have in-built TCP\/UDP stack. AT command tester provides interfaces to test TCP\/UDP <\/a>functions of SIMCOM modules.<\/p>\n AT Command sequence for Simcom TCP function<\/strong> \/\/Checking if device is already connected...<\/strong><\/em><\/span> +CGACT: 1,0 OK OK<\/p>\n \/\/Attaching to network...<\/strong><\/em><\/span> OK<\/p>\n \/\/Setting up APN for TCP connection...<\/strong><\/em><\/span> OK<\/p>\n \/\/Bring up GPRS Connection...<\/strong><\/em><\/span><\/p>\n AT+CIICR<\/p>\n OK<\/p>\n \/\/Get the local IP address<\/strong><\/em><\/span> 10.0.131.15<\/p>\n \/\/Start TCP connection<\/strong><\/em><\/span> OK<\/p>\n CONNECT OK Sending TCP data<\/p>\n \/\/Send data. Below data is HTTP formatted.<\/span><\/strong><\/em> > \u001a \/\/Response from remote server.<\/strong><\/em><\/span> 3a <\/code> Device manufacturers implement proprietary AT coommand interfaces for TCP\/UDP connections. Typical interfaces includes bringing up TCP\/UDP connection, setting up TCP configuration, send\/receive data to remote server, providing link statistics etc. TCP\/UDP Testing for Huawei Modules Huawei modules have embedded TCP\/UDP … Continue reading ![\"Huawei](\"http:\/\/www.m2msupport.net\/m2msupport\/wp-content\/themes\/admired\/images\/huawei_tcp_send.PNG\")
<\/a><\/p>\n
\nUp to five TCP or UDP connection links can be setup at a time. First IP initialization uses the APN information to create a network connection. Once the IP is initialized, a successful IP address is avilable. Once the IP is initialized, a connection to a remote server to a specific port can be made.<\/p>\n
\nChecking registration status...<\/code><\/p>\nAT+CREG?<\/code><\/p>\n+CREG: 2,5,\"7CF4\",\"232B521\",2<\/p>\n
\nDevice is registered and is roaming.<\/p>\n
\n+CGACT: 15,0<\/p>\n
\nDisconnected profile 1
\nAT+CGACT=0, 1<\/p>\n
\nDis-connect is successful<\/p>\n
\nAT+CMEE=1<\/p>\n
\nAttaching to network...
\nAT+CGATT=1<\/p>\n
\nAT^IPINIT=\"bluevia.movistar.es\"<\/p>\n
\nThe network connection is sucessfully initialized.
\nIP Address -> \"10.104.133.125\"
\nAPN -> \"bluevia.movistar.es\"
\nPrimary DNS Address -> \"80.58.61.250\"
\nSecondary DNS Address -> \"80.58.61.254\"
\nOpening the TCP connection...<\/p>\n
\nAT^IPOPEN?<\/p>\n
\nFollowing connections are opened,<\/p>\n
\nType->\"TCP\"
\nLocal Port->39855
\nRemote IP->\"74.124.194.252\"
\nRemote Port->80
\nSIO Port>3
\nMSS Port->1220
\nAT^IPOPEN?<\/p>\n
\nFollowing connections are opened,<\/p>\n
\nType->\"TCP\"
\nLocal Port->39855
\nRemote IP->\"74.124.194.252\"
\nRemote Port->80
\nSIO Port>3
\nMSS Port->1220
\nSending TCP data<\/p>\n
\nOnce an IP connection is established, you can use TCP or UDP to connect to a remote server. You can then send the client data using the AT Command Tester. In the above, example, the device is connected to HTTP port (80) of http:\/\/m2msupport.net. It then sends HTTP formatted message to the server over the TCP\/IP connection. It gets successful response back from the server which is also a HTTP formatted message. When you input messages in the 'Client Data' text box, please check the appropriate formatting(newline) of the intended application.<\/p>\n<\/code><\/code>
\nAT^IPSEND=1,\"
\nGET \/m2msupport\/http_get_test.php HTTP\/1.1
\nHost:www.m2msupport.net
\nConnection:keep-alive<\/code><\/p>\n
\n^IPDATA: 1,416,HTTP\/1.1 200 OK
\nDate: Tue, 14 Jan 2014 13:53:50 GMT
\nServer: Apache\/2.2.26 (Unix) mod_ssl\/2.2.26 OpenSSL\/0.9.8e-fips-rhel5 DAV\/2 mod_auth_passthrough\/2.1 mod_bwlimited\/1.4 FrontPage\/5.0.2.2635
\nX-Powered-By: PHP\/5.2.17
\nKeep-Alive: timeout=3, max=100
\nConnection: Keep-Alive
\nTransfer-Encoding: chunked
\nContent-Type: text\/html; charset=utf-8<\/p>\n
\nSucessful HTTP GET test. Data received from m2msupport.net
\n0<\/p>\n![\"\"](\"http:\/\/www.m2msupport.net\/m2msupport\/wp-content\/themes\/admired\/images\/simcom_tcp.PNG\" "\\"diagnostics\\"")
<\/a><\/p>\n
\n
\n\/\/Checking registration status...<\/strong><\/em><\/span>
\nAT+CREG?<\/code><\/p>\n+CREG: 0,5<\/code><\/p>\nOK
\nDevice is registered and is roaming.<\/p>\n
\nAT+CGACT?<\/p>\n
\n+CGACT: 2,0
\n+CGACT: 3,0<\/p>\n
\nAT+CMEE=1<\/p>\n
\nAT+CGATT=1<\/p>\n
\nAT+CSTT=\"bluevia.movistar.es\"<\/p>\n
\nAT+CIFSR<\/p>\n
\nAT+CIPSTART=\"TCP\",\"74.124.194.252\",\"80\"<\/p>\n
\nTCP connection success<\/p>\n
\nAT+CIPSEND<\/p>\n
\nGET \/m2msupport\/http_get_test.php HTTP\/1.1
\nHost:www.m2msupport.net
\nConnection:keep-alive<\/p>\n
\nSEND OK<\/p>\n
\nHTTP\/1.1 200 OK
\nDate: Mon, 20 Jan 2014 19:44:37 GMT
\nServer: Apache\/2.2.26 (Unix) mod_ssl\/2.2.26 OpenSSL\/0.9.8e-fips-rhel5 DAV\/2 mod_auth_passthrough\/2.1 mod_bwlimited\/1.4 FrontPage\/5.0.2.2635
\nX-Powered-By: PHP\/5.2.17
\nKeep-Alive: timeout=3, max=100
\nConnection: Keep-Alive
\nTransfer-Encoding: chunked
\nContent-Type: text\/html; charset=utf-8<\/p>\n
\nSucessful HTTP GET test. Data received from m2msupport.net
\n0<\/p>\n<\/code>CLOSED
\nTCP connection is closed by remote server
\n<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"