SIM900_IP_Application_Note_V1.01.pdf-资料库

SIM900_IP_Application Note_V1.01

Smart Machine Smart Decision Document Title: Version: Date: Status: SIM900 IP Application Note 1.01 2011-03-23 Release SIM900_IP_Application Note_V1.01 Document Control ID: General Notes SIMCom offers this information as a service to its customers, to support application and engineering efforts that use the products designed by SIMCom. The information provided is based upon requirements specifically provided to SIMCom by the customers. SIMCom has not undertaken any independent search for additional relevant information, including any information that may be in the customer’s possession. Furthermore, system validation of this product designed by SIMCom within a larger electronic system remains the responsibility of the customer or the customer’s system integrator. All specifications supplied herein are subject to change. Copyright This document contains proprietary technical information which is the property of SIMCom Limited., copying of this document and giving it to others and the using or communication of the contents thereof, are forbidden without express authority. Offenders are liable to the payment of damages. All rights reserved in the event of grant of a patent or the registration of a utility model or design. All specification supplied herein are subject to change without notice at any time. Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2011 SIM900_IP_Application Note_V1.01 2011.03.23 3

Smart Machine Smart Decision Contents Version history ................................................................................................................................5 1. Bearer Configure.................................................................................................................6 1.1 Bearer Profile...........................................................................................................................6 2. HTTP Application ...............................................................................................................7 2.1 HTTP GET Method .................................................................................................................7 2.2 HTTP POST Method ...............................................................................................................7 2.3 HTTP HEAD Method..............................................................................................................8 2.4 Set Proxy HTTP Server ...........................................................................................................8 2.5 Set HTTP Redirection Parameter.............................................................................................9 2.6 Set HTTP Download Break Point Parameter.........................................................................10 3. FTP Application.................................................................................................................10 3.1 FTP GET Method ..................................................................................................................11 3.2 FTP PUT Method...................................................................................................................12 3.3 FTP Time Out ........................................................................................................................13 3.4 FTP Error...............................................................................................................................14 3.5 FTP Operation Error..............................................................................................................14 3.6 FTP READ and WRITE Error...............................................................................................14 3.7 Set FTP Download Break Point Parameter............................................................................15 Appendix........................................................................................................................................17 Related Documents .................................................................................................17 Conventions and Abbreviations ..............................................................................17 A. B. SIM900_IP_Application Note_V1.01 2011.03.23 4

Smart Machine Smart Decision Version history Date 2010-11-15 2011-3-23 Version Description of change 1.00 1.01 Origin Added new chapter 3.7 to describes how to use FTP broken download resuming function. Author Chenyang SCOPE This document describes how to use the HTTP and FTP function of SIM900 through AT commands. Examples are also given for reference. This document can be used for SIM900 serial modules, like SIM900, SIM900D, SIM900B and SIM900A. This document is subject to change without notice at any time. SIM900_IP_Application Note_V1.01 2011.03.23 5

Smart Machine Smart Decision 1. Bearer Configure The bearer contexts of HTTP and FTP applications can be set or activated by SAPBR command. 1.1 Bearer Profile Demonstration Configure bearer profile 1 To open a GPRS context. Syntax AT+SAPBR=3,1,"Contype","G PRS" AT+SAPBR=3,1,"APN","CM NET" AT+SAPBR =1,1 Expect Result OK OK OK To query the GPRS context. AT+SAPBR=2,1 +SAPBR: 1,1,"10.89.193.1" OK OK To close a GPRS context. GPRS context is released by network AT+SAPBR =0,1 +SAPBR 1: DEACT SIM900_IP_Application Note_V1.01 2011.03.23 6

Smart Machine Smart Decision 2. HTTP Application Hyper Text Transfer Protocol application provides a mode to alternate of HTTP server. The basic application contains GET, POST, HEAD methods; it also supports proxy server, redirection, broken transfer resuming functions. 2.1 HTTP GET Method Download data from HTTP server Demonstration Init http service Syntax AT+HTTPINIT Set parameters session for HTTP GET session start GET successfully AT+HTTPPARA = “CID”,1 AT+HTTPPARA=“URL”,”ww w.sim.com” AT+HTTPACTION=0 the data of HTTP Read server AT+HTTPREAD Terminate http service AT+HTTPTERM Expect Result OK OK OK OK +HTTPACTION:0,200,10 00 +HTTPREAD: 1000 …. //output the data to uart OK OK 2.2 HTTP POST Method Upload data to HTTP server Demonstration Init http service Set parameters session for HTTP Syntax AT+HTTPINIT AT+HTTPPARA = “CID”,1 AT+HTTPPARA=“URL”,”ww w.sim.com” Expect Result OK OK OK SIM900_IP_Application Note_V1.01 2011.03.23 7

Smart Machine Smart Decision POST the data whose size is 100 Bytes and the maximum latency time for inputting is 10000 ms. It is recommended to set the latency time long enough to allow downloading all the data. POST session start POST successfully AT+HTTPDATA=100,10000 AT+HTTPACTION=1 DOWNLOAD …… //It is ready to receive data from uart, and DCD has been set to low. OK //All data has been received over, and DCD is set to high. OK +HTTPACTION:1,200,0 Terminate http service AT+HTTPTERM OK 2.3 HTTP HEAD Method Get HTTP head information from HTTP server Demonstration Init http service Syntax AT+HTTPINIT Set parameters session for HTTP HEAD session start HEAD successfully AT+HTTPPARA = “CID”,1 AT+HTTPPARA=“URL”,”ww w.sim.com” AT+HTTPACTION=1 Expect Result OK OK OK OK +HTTPACTION:1,200,0 Terminate http service AT+HTTPTERM OK 2.4 Set Proxy HTTP Server It provides the method to use proxy HTTP server. Demonstration Init http service Syntax AT+HTTPINIT Set parameters session for HTTP AT+HTTPPARA = “CID”,1 AT+HTTPPARA=“URL”,”ww w.sim.com” Expect Result OK OK OK SIM900_IP_Application Note_V1.01 2011.03.23 8

Smart Machine Smart Decision Set proxy server IP address Set proxy server port GET session start GET successfully AT+HTTPPARA=“PROIP”,”1 0.0.0.172” AT+HTTPPARA = “PROPORT”,80 AT+HTTPACTION=0 the data of HTTP Read server AT+HTTPREAD Terminate http service AT+HTTPTERM 2.5 Set HTTP Redirection Parameter It provides the method to use HTTP redirection function. Demonstration Init http service Syntax AT+HTTPINIT OK OK OK +HTTPACTION:0,200,10 00 +HTTPREAD: 1000 …. //output the data to uart OK OK Expect Result OK OK for HTTP Set parameters session Set the redirection parameter AT+HTTPPARA = “CID”,1 AT+HTTPPARA = “REDIR”,1 OK Set the URL GET session start GET successfully AT+HTTPPARA=“URL”,”ww w.sim.com/abcde” AT+HTTPACTION=0 Read the response of HTTP server AT+HTTPREAD Terminate http service AT+HTTPTERM OK OK +HTTPACTION:0,200,10 00 +HTTPREAD: 1000 …. //output the data to uart OK OK SIM900_IP_Application Note_V1.01 2011.03.23 9

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