Quectel EC20 AT Commands Manual V1.0
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EC20 HTTP AT Commands Manual LTE Module Series Rev. EC20_HTTP_AT_Commands_Manual_V1.0 Date: 2015-07-02 www.quectel.com LTE Module Series EC20 HTTP AT Commands Manual Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters: Quectel Wireless Solutions Co., Ltd. Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233 Tel: +86 21 5108 6236 Mail: info@quectel.com Or our local office, for more information, please visit: l e t l c a e i t u n Q ide f n o C http://www.quectel.com/support/salesupport.aspx For technical support, to report documentation errors, please visit: http://www.quectel.com/support/techsupport.aspx Or Email: Support@quectel.com GENERAL NOTES QUECTEL OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION. ALL INFORMATION SUPPLIED HEREIN IS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE. COPYRIGHT THIS INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF QUECTEL CO., LTD. TRANSMITTABLE, REPRODUCTION, DISSEMINATION AND EDITING OF THIS DOCUMENT AS WELL AS UTILIZATION OF THIS CONTENTS ARE FORBIDDEN WITHOUT PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL OR DESIGN. Copyright © Quectel Wireless Solutions Co., Ltd. 2015. All rights reserved. EC20_HTTP_AT_Commands_Manual Confidential / Released 1 / 31 LTE Module Series EC20 HTTP AT Commands Manual About the Document History Revision 1.0 l e t l c a e i t u n Q ide f n o C Date Author Description 2015-07-02 Chris PENG Initial EC20_HTTP_AT_Commands_Manual Confidential / Released 2 / 31 LTE Module Series EC20 HTTP AT Commands Manual Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ................................................................................................................................................... 4 1 Introduction .......................................................................................................................................... 5 1.1. The Process of Using HTTP AT Commands ............................................................................. 5 1.2. Description of HTTP Header ..................................................................................................... 6 1.2.1. Customize HTTP Request Header .................................................................................. 6 1.2.2. Output HTTP Response Header ...................................................................................... 6 1.3. Description of Data Mode ........................................................................................................ 6 1.4. Error Handling ......................................................................................................................... 7 1.4.1. Executing HTTP AT Command Fails ............................................................................... 7 1.4.2. PDP Activation Fails ......................................................................................................... 7 1.4.3. DNS Parse Fails ............................................................................................................... 8 1.4.4. Entering Online Data Mode Fails ..................................................................................... 8 1.4.5. Sending GET/POST Request Fails.................................................................................. 8 1.4.6. Reading Response Fails .................................................................................................. 9 l e t l c a e i t u n Q ide f n o C 2 Description of AT Command ............................................................................................................ 10 2.1. AT+QHTTPCFG Configure Parameters for HTTP(S) Server ............................................... 10 2.2. AT+QHTTPURL Set HTTP(S) Server URL .......................................................................... 12 2.3. AT+QHTTPGET Send GET Request to HTTP(S) Server .................................................... 13 2.4. AT+QHTTPPOST Send POST Request to HTTP(S) Server by UART/USB ....................... 14 2.5. AT+QHTTPPOSTFILE Send POST Request to HTTP(S) Server by File ............................ 16 2.6. AT+QHTTPREAD Read Response from HTTP(S) Server by UART/USB ........................... 18 2.7. AT+QHTTPREADFILE Read Response from HTTP(S) Server by File ............................... 18 3 Example .............................................................................................................................................. 20 3.1. Access to HTTP Server ........................................................................................................... 20 3.1.1. Send HTTP GET Request.............................................................................................. 20 3.1.2. Send HTTP POST Request ........................................................................................... 21 3.1.2.1. Post Body Obtained from UART/USB .................................................................. 21 3.1.2.2. Post Body Obtained from File System ................................................................. 22 3.2. Access to HTTPS Server......................................................................................................... 23 3.2.1. Send HTTP GET Request.............................................................................................. 23 3.2.2. Send HTTP POST Request ........................................................................................... 25 3.2.2.1. Post Body Obtained from UART/USB .................................................................. 25 3.2.2.2. Post Body Obtained from File System ................................................................. 26 4 5 6 Summary of ERROR Code ................................................................................................................ 28 Summary of HTTP Response Code ................................................................................................. 30 Appendix A Reference....................................................................................................................... 31 EC20_HTTP_AT_Commands_Manual Confidential / Released 3 / 31 LTE Module Series EC20 HTTP AT Commands Manual Table Index TABLE 1: DIFFERENT CODING SCHEMES OF +CME ERROR :...................................................... 28 TABLE 2: DIFFERENT CODING SCHEMES OF HTTP RESPONSE CODE ................................................... 30 TABLE 3: RELATED DOCUMENTS .................................................................................................................. 31 TABLE 4: TERMS AND ABBREVIATIONS ........................................................................................................ 31 l e t l c a e i t u n Q ide f n o C EC20_HTTP_AT_Commands_Manual Confidential / Released 4 / 31 LTE Module Series EC20 HTTP AT Commands Manual 1 Introduction EC20 provides HTTP application to HTTP(S) server. This document is a reference guide to all the AT commands defined for HTTP. l e t l c a e i t u n Q ide f n o C 1.1. The Process of Using HTTP AT Commands Through EC20 TCPIP AT command, you can configure PDP context, activate and deactivate PDP context, query PDP context status (Please refer to Quectel_EC20_TCPIP_AT_Commands_Manual), and through EC20 HTTP AT command, you can send HTTP GET/POST request to HTTP server, and read HTTP response from HTTP server. The general process is as follows: Step 1: Configure the , , and other parameters of PDP context by AT+QICSGP (Please refer to Quectel_EC20_TCPIP_AT_Commands_Manual). If QoS settings need to be updated, configure them by the commands AT+CGQMIN, AT+CGEQMIN, AT+CGQREQ and AT+CGEQREQ (For more details, please refer to Quectel_EC20_AT_ Commands_Manual). Step 2: Activate PDP context by AT+QIACT, then the assigned IP address can be queried by AT+QIACT? (Please refer to Quectel_EC20_TCPIP_AT_Commands_Manual). Step 3: Set PDP context ID and SSL context ID by AT+QHTTPCFG command. Step 4: Configure SSL context parameters by AT+QSSLCFG Quectel_EC20_SSL_AT_Commands_Manual). command (Please refer to Step 5: Set HTTP URL by AT+QHTTPURL command. Step 6: Send HTTP request. AT+QHTTPGET command can be used for sending HTTP GET request, AT+QHTTPPOST or QHTTPOSTFILE command can be used for sending HTTP POST request. Step 7: Read HTTP response information by AT+QHTTPREAD or QHTTPREADFILE command. Step 8: Deactivate PDP context by AT+QIDEACT command. (For details, please refer to Quectel_EC20_TCPIP_AT_Commands_Manual). EC20_HTTP_AT_Commands_Manual Confidential / Released 5 / 31 LTE Module Series EC20 HTTP AT Commands Manual 1.2. Description of HTTP Header 1.2.1. Customize HTTP Request Header HTTP request header is filled by the modem automatically. If you want to customize the HTTP request header, you can set as 1 by AT+QHTTPCFG command, and then input HTTP request header as below: 1. 2. 3. Follow HTTP header syntax. The value of URI in HTTP request line and the “Host:” header must be in line with the URL configured by AT+QHTTPURL command. The HTTP request header must end with . l e t l c a e i t u n Q ide f n o C The following example shows a valid HTTP POST request header: POST/processorder.php HTTP/1.1 Host: 220.180.239.201:8011 Accept: */* User-Agent: QUECTEL_MODULE Connection: Keep-Alive Content-Type: application/x-www-form-urlencoded Content-Length: 42 1.2.2. Output HTTP Response Header HTTP response header will not output automatically. If you want to obtain HTTP response header information, you can set to 1 by AT+QHTTPCFG command, and the HTTP response header will be output with HTTP response body when you execute AT+QHTTPREAD or AT+QHTTPREADFILE command. 1.3. Description of Data Mode The mode of the COM port includes AT command mode and data mode. The difference between them is as follows: 1) 2) In AT command mode, the data input via COM port will be treated as AT command. In data mode, the data input via COM port will be treated as data. EC20_HTTP_AT_Commands_Manual Confidential / Released 6 / 31 LTE Module Series EC20 HTTP AT Commands Manual You can exit from data mode by using “+++” or pulling up DTR (AT&D1 should be set).To prevent the “+++” from being misinterpreted as data, it should comply with the following sequence: 1) 2) 3) Do not input any character within 1 second before inputting “+++”. Input “+++” within 1 second, and no other characters can be input during this time. Do not input any character wit in 1 second after “+++” has been input. When you execute QHTTPURL, QHTTPHEAD, QHTTPOST and QHTTPREAD, the modem will enter data mode. If you are using “+++” or DTR to make module exit from online data mode, the executing procedure of these command will be interrupted before the executed result is returned, and you can’t reenter online data mode by executing ATO command. l e t l c a e i t u n Q ide f n o C 1.4. Error Handling 1.4.1. Executing HTTP AT Command Fails If you execute HTTP AT command and receive response “ERROR” from modem, please check whether the SIM card is inserted and the result of “AT+CPIN?” is “+CPIN: READY”. 1.4.2. PDP Activation Fails If you failed to active PDP context by AT+QIACT command, please check the following aspects: 1. Query whether the PS domain is attached by AT+CGATT? command. If not, execute AT+CGATT=1 command to attach PS domain. 2. Query the PS domain status by AT+CGREG? command and make sure the PS domain has been registered. 3. Query the PDP context parameters by AT+QICSGP command and make sure the APN of specified PDP context has been set. 4. Make sure the specified PDP context ID is neither used by PPP nor activated by AT+CGACT command. 5 The module only supports three PDP contexts activated simultaneously, so you must make sure the amount of activated PDP context is less than 3. If the result of above checking is OK, but the executing of AT+QIACT command still fails, please reboot the modem to resolve this issue. After rebooting the modem, please follow the above checking at least three times and each time at an interval of 10 minutes to avoid frequent rebooting of the module. EC20_HTTP_AT_Commands_Manual Confidential / Released 7 / 31 LTE Module Series EC20 HTTP AT Commands Manual 1.4.3. DNS Parse Fails When executing AT+QHTTPGET, AT+QHTTPPOST and QHTTPPOSTFILE commands, if “+CME ERROR: 714” (714: HTTP DNS error) is returned, please check the following aspects: 1. Make sure the domain name of HTTP server is valid. 2. Query the status of PDP context via AT+QIACT? command to make sure the specified PDP context has been activated successfully. 3. Query the address of DNS server via AT+QIDNSCFG command to make sure the address of DNS server is not equal to “0.0.0.0”. l e t l c a e i t u n Q ide f n o C If the DNS server address is equal to “0.0.0.0”, there are two solutions: 1. 2. Reassign a valid DNS server address by AT+QIDNSCFG command. Deactivate the PDP context by AT+QIDEACT command, and re-activate the PDP context via AT+QIACT command. 1.4.4. Entering Online Data Mode Fails When executing QHTTPURL, QHTTPGET, QHTTPPOST and QHTTPREAD commands, if “+CME ERROR: 704” (704: HTTP UART busy) is returned, please check whether there are other ports in online data mode, since the modem only supports one port in online data mode simultaneously. If you encounter this issue during executing QHTTPURL, QHTTPGET, QHTTPPOST and QHTTPREAD command, please re-execute these commands after other ports exit from online data mode. 1.4.5. Sending GET/POST Request Fails If you receive a failed result during executing AT+QHTTPGET, AT+QHTTPPOST and QHTTPPOSTFILE command, please check the following aspects: 1. Make sure the URL input via HTTPURL command is valid and can be accessed. 2. Make sure the specified server supports GET/POST command. 3. Make sure the PDP context has been activated successfully. If the result of above checking is OK, but the executing of AT+QHTTPGET, QHTTPPOST and QHTTPPOSTFILE command still fails, please deactivate the PDP context via AT+QIDEACT and reactivate the PDP context via AT+QIACT to resolve this issue. If you encounter failed result during activating the PDP context, please refer to Chapter 1.4.2 to resolve it. EC20_HTTP_AT_Commands_Manual Confidential / Released 8 / 31 LTE Module Series EC20 HTTP AT Commands Manual 1.4.6. Reading Response Fails Before reading response by AT+QHTTPREAD and QHTTPREADFILE command, you should execute AT+QHTTPGET, AT+QHTTPPOST and QHTTPPOSTFILE command and receive the URC information: “+QHTTPGET: [, [, ]]”/ “+QHTTPPOST: [, [, ]]”/ “+QHTTPPOSTFILE: [, , ]” During executing AT+QHTTTPREAD and QHTTPREADFILE command, if you encounter some errors, such as: “+CME ERROR: 717” (717: HTTP read error), please resend HTTP GET/POST request to HTTP server by AT+QHTTPGET, AT+QHTTPPOST and QHTTPPOSTFILE command. If you encounter failed result during sending GET/POST request to HTTP server, please refer to Chapter 1.4.5 to resolve it. l e t l c a e i t u n Q ide f n o C EC20_HTTP_AT_Commands_Manual Confidential / Released 9 / 31 LTE Module Series EC20 HTTP AT Commands Manual 2 Description of AT Command 2.1. AT+QHTTPCFG Configure Parameters for HTTP(S) Server l e t l c a e i t u n Q ide f n o C AT+QHTTPCFG is used to configure the parameters for HTTP service, including PDP context ID, customizing HTTP request header and outputting HTTP response header and querying SSL settings. If the write command only executes one parameter, it will query the current settings. AT+QHTTPCFG Configure Parameters for HTTP(s) Server Test Command AT+QHTTPCFG=? Response +QHTTPCFG: “contextid”,(1-16) +QHTTPCFG: “requestheader”,(0,1) +QHTTPCFG: “responseheader”,(0,1) +QHTTPCFG: “sslctxid”,(0-5) +QHTTPCFG: "contenttype",(0-3) OK Write Command AT+QHTTPCFG=“contextid”[, ] Response If is not omitted: OK or +CME ERROR: Else, query the current settings: +QHTTPCFG: “contextid”, OK Write Command AT+QHTTPCFG=“requestheader”[, ] Response If is not omitted: OK or +CME ERROR: Else, query the current settings: +QHTTPCFG: “requestheader”, OK EC20_HTTP_AT_Commands_Manual Confidential / Released 10 / 31 LTE Module Series EC20 HTTP AT Commands Manual Write Command AT+QHTTPCFG=“responseheader”[, ] Response If is not omitted: OK or +CME ERROR: Else, query the current settings: +QHTTPCFG: “responseheader”, OK Write Command AT+QHTTPCFG=“sslctxid”[, ] Response If is not omitted: OK or +CME ERROR: l e t l c a e i t u n Q ide f n o C Else, query the current settings: +QHTTPCFG: “sslctxid”, OK Read Command AT+QHTTPCFG? Parameter Response +QHTTPCFG: “contextid”, +QHTTPCFG: “requestheader”, +QHTTPCFG: “responseheader”, +QHTTPCFG: “sslctxid”, +QHTTPCFG: "contenttype", OK Numeric type, indicates PDP context ID, range is 1-16, default value is 1 Numeric type, indicates whether to customize HTTP request header 0 Disable 1 Enable Numeric type, indicates whether to output HTTP response header or not 0 Disable 1 Enable Numeric type, indicates this SSL context ID will be used for HTTP. The range is 0-5, default value is 1. You should configure the SSL parameter by AT+QSSLCFG. (For details, please refer to the command AT+QSSLCFG in Quectel_EC20_SSL_AT_Commands_Manual.) Numeric type, indicates the data type of HTTP body 0 application/x-www-form-urlencoded EC20_HTTP_AT_Commands_Manual Confidential / Released 11 / 31 LTE Module Series EC20 HTTP AT Commands Manual 1 text/plain 2 application/octet-stream 3 multipart/form-data The type of error, please refer to Chapter 4 2.2. AT+QHTTPURL Set HTTP(S) Server URL To input URL, you must begin with “http://” or “https://”. If the URL begins with “http://”, it indicates you will access to a HTTP server. If the URL begins with “https://”, it indicates you will access to a HTTPS server. l e t l c a e i t u n Q ide f n o C AT+QHTTPURL Set HTTP(S) Server URL Test Command AT+QHTTPURL=? Response +QHTTPURL: (1-700),(1-65535) OK Write Command AT+QHTTPURL= [, ] Response a) If format is right, and it is not sending HTTP GET/POST request at present: CONNECT TA switches to the transparent access mode, and the URL can be input. When the total size of the input data reaches , TA will return to command mode and report the following codes: OK If the has reached, but the received length of URL is less than , TA will return to command mode and report the following code: +CME ERROR: b) If parameter format is not right or other errors occur: +CME ERROR: Read Command AT+QHTTPURL? Response [+QHTTPURL: ] OK Parameter Numeric type, indicates the length of URL, range is 1-700, unit: byte Numeric type, indicates the maximum time in seconds to input URL, range is EC20_HTTP_AT_Commands_Manual Confidential / Released 12 / 31 LTE Module Series EC20 HTTP AT Commands Manual 1-65535, default value is 60, unit: second The type of error, please refer to Chapter 4 2.3. AT+QHTTPGET Send GET Request to HTTP(S) Server According to the configured parameter in the command AT+QHTTPCFG=“requestheader”[, ], the HTTPGET write command has two different formats, the details are shown as below. Please note that if equals to 1, after the command AT+QHTTPGET has been sent, the CONNECT may be output in 125s to indicate that the connection is successful. If it is not received during this time, the +CME ERROR: will be output. l e t l c a e i t u n Q ide f n o C After the HTTPGET write command has been sent, it is suggested to wait a specific time (refer to the Maximum Response Time below) after the result code OK is reported for the URC response “+QHTTPGET: [, [, ]]”. In the URC “+QHTTPGET: [, [, ]]”, the parameter can only be reported when equals to 0. If HTTP response header contains “CONTENT-LENGTH” information, the information will be reported. AT+QHTTPGET Send GET Request to HTTP(S) Server Test Command AT+QHTTPGET=? Response +QHTTPGET: (1-65535),(1-2048),(1-65535) OK If equals to 0 (disable customizing HTTP request header) AT+QHTTPGET[= ] Response a) If parameter format is right and no other errors occur: OK When modem has received response from HTTP server, it will report the following URC: +QHTTPGET: [, [, ]] b) If parameter format is not right or other errors occur: +CME ERROR: If equals to 1 (enable customizing HTTP request header) AT+QHTTPGET= , [, ] Response a) If connect HTTP server successfully: CONNECT TA switches to the transparent access mode, and the HTTP GET request header can be input. When the total size of the input data reaches , TA will return to command mode and report the following codes: EC20_HTTP_AT_Commands_Manual Confidential / Released 13 / 31 LTE Module Series EC20 HTTP AT Commands Manual OK When modem has received response from HTTP server, it will report the following URC: +QHTTPGET: [, [, ]] If the has reached, but the length of received data is less than , TA will return to command mode and report the following code: +CME ERROR: l e t l c a e i t u n Q ide f n o C b) If parameter format is not right or other errors occur: +CME ERROR: Determined by Maximum Response Time Parameter Numeric type, the range is 1-65535. The default value is 60, unit: second. It is used to configure the timeout for the HTTP GET response URC “+QHTTPGET: [, , ]” to report after the result code OK is returned Numeric type, indicates the length of HTTP request information, including HTTP request header and HTTP request body, range is 1-2048, unit: byte Numeric type, indicates the maximum time in seconds to input HTTP request information, range is 1-65535. The default value is 60, unit: second Please refer to Chapter 4 Please refer to Chapter 5 Please refer to Chapter 2.1 Numeric type, indicates the length of HTTP response body, unit: byte. 2.4. AT+QHTTPPOST Send POST Request to HTTP(S) Server by UART/USB You can send HTTP POST request via AT+QHTTPPOST command. According to the configured parameter in the command AT+QHTTPCFG=“requestheader”[, ], the HTTPPOST write command has two different formats, if you set to 0, you should input post body by UART/USB, else if you set to 1, you should input post header and body by UART/USB. EC20_HTTP_AT_Commands_Manual Confidential / Released 14 / 31 LTE Module Series EC20 HTTP AT Commands Manual After the command AT+QHTTPPOST has been sent, the CONNECT may be output in 125s to indicate the connection is successful, if it isn’t received during this time, the +CME ERROR: will be output. It is suggested to wait a specific time (refer to the Maximum Response Time below) after the result code OK is reported for the URC response “+QHTTPPOST: [, [, ]]”. AT+QHTTPPOST Send POST Request to HTTP(S) Server by UART/USB Test Command AT+QHTTPPOST=? Response +QHTTPPOST: (1-1024000),(1-65535),(1-65535) OK l e t l c a e i t u n Q ide f n o C If equals to 0 (disable customizing HTTP request header) AT+QHTTPPOST= [, , ] Response a) If parameter format is right and HTTP server is connected successfully and HTTP request header is sent completely, it will prompt you to input body: CONNECT TA switches to the transparent access mode, and the HTTP POST body can be input. When the total size of the input data reaches , TA will return to command mode and report the following codes: OK When modem has received response from HTTP server, it will report the following URC: +QHTTPPOST: [, [, ]] If the has reached, but the received length of data is less than , TA will return to command mode and report the following code: +CME ERROR: b) If parameter format is not right or other errors occur: +CME ERROR: If equals to 1 (enable customizing HTTP request header) AT+QHTTPPOST= [, , ] Response a) If parameter format is right and HTTP server is connected successfully: CONNECT TA switches to the transparent access mode, and the HTTP POST header and body can be input. When the total size of the input data reaches , TA will return to command mode and report the following codes: OK EC20_HTTP_AT_Commands_Manual Confidential / Released 15 / 31 LTE Module Series EC20 HTTP AT Commands Manual When modem has received response from HTTP server, it will report the following URC: +QHTTPPOST: [, [, ]] If the has reached, but the length of received data is less than , TA will return to command mode and report the following code: +CME ERROR: b) If parameter format is not right or other errors occur: +CME ERROR: l e t l c a e i t u n Q ide f n o C Maximum Response Time Parameter Determined by network and Numeric type, if is 0, it indicates the length of post body, and if is 1, it indicates the length of HTTP request information, including HTTP request header and HTTP request body, range is 1-1024000, unit: byte Numeric type, indicates the maximum time in seconds to input post body or HTTP request information, range is 1-65535. The default value is 60, unit: second Numeric type, range is 1-65535. The default value is 60, unit: second. It is used to configure the timeout for the HTTP POST response URC “+QHTTPPOST: [, [, ]]” to report after the result code OK is returned Please refer to Chapter 4 Please refer to Chapter 5 Please refer to Chapter 2.1 Numeric type, indicates the length of HTTP response body, unit: byte 2.5. AT+QHTTPPOSTFILE Send POST Request to HTTP(S) Server by File You also can send HTTP POST request in file via AT+QHTTPPOSTFILE command. According to the in the command AT+QHTTPCFG=“requestheader”[, ], the file operated through HTTPPOSTFILE command has two different formats, if set to 0, the file in file system will be post body, else if set to 1, the file in file system will be post header and body. EC20_HTTP_AT_Commands_Manual Confidential / Released 16 / 31 LTE Module Series EC20 HTTP AT Commands Manual The modem will report information “+QHTTPPOSTFILE: [, [, ]]” to indicate the executing result of AT+QHTTPPOSFILE command. The parameter can only be reported when equals to 0. It is suggested to wait a specific time (refer to the Maximum Response Time below) after the result code OK is reported for the URC response “+QHTTPPOSTFILE: [, [, ]]”. AT+QHTTPPOSTFILE Send POST Request to HTTP(S) Server by File Test Command AT+QHTTPPOSTFILE=? Response +QHTTPPOSTFILE: ,(1-65535) l e t l c a e i t u n Q ide f n o C OK Write Command AT+QHTTPPOSTFILE= [,< rsptime>] If equals to 1, the specified file must contain HTTP request header information. Response a) If parameter format is right and HTTP server is connected successfully: OK When modem has received response from HTTP server, it will report the following URC: +QHTTPPOSTFILE: [, , ] b) If parameter format is not right or other errors occur: +CME ERROR: Determined by Maximum Response Time Parameter String type, file name, the max length of file name is 80, unit: byte Numeric type, the range is 1-65535. The default value is 60, unit: second. It is used to configure the timeout for the HTTP POST response URC “+QHTTPPOSTFILE: [, , ]” to report after the result code OK is returned. Please refer to Chapter 4 Please refer to Chapter 5 Please refer to Chapter 2.1 Numeric type, indicates the length of HTTP response body EC20_HTTP_AT_Commands_Manual Confidential / Released 17 / 31 LTE Module Series EC20 HTTP AT Commands Manual 2.6. AT+QHTTPREAD Read Response from HTTP(S) Server by UART/USB After sending HTTP GET/POST request, you can retrieve HTTP response information from HTTP server to UART/USB via AT+QHTTPREAD command. And before executing AT+QHTTPREAD, “+QHTTPGET: [, [, ]]”, “+QHTTPPOST: [, [, ]]” or “+QHTTPPOSTFILE: [, , ]” information must be received. AT+QHTTPREAD Read Response from HTTP(S) Server by UART/USB l e t l c a e i t u n Q ide f n o C Test Command AT+QHTTPREAD=? Response +QHTTPREAD: (1-65535) OK Write Command AT+QHTTPREAD[= ] Response a) If parameter format is right and read successfully: CONNECT