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SIM900_DTMF.pdf

发布时间：2022-04-03 发布人：admin 分类：互联网 资料大小：0.13M 资料格式：pdf 举报 版权申诉
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    Version history
    AT COMMAND
    SIM900_DDET_Application Note_V1.00
    Smart Machine Smart Decision Document Title: Version: Date: Status: SIM900 DDET Application Note 1.00 2011-06-17 Release SIM900_DDET_Application Note_V1.00 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_DDET_Application Note_V1.00 2011.06.17 3
    Smart Machine Smart Decision Version history Version Description of change 1.00 Origin Author wangzhengning Date 2011-6-17 SCOPE This document describes how to use the DTMF Detection function of SIM900 through AT commands. Examples are also given for reference. This document can be used for SIM900 serial modules, like SIM900 and SIM900D. This document is subject to change without notice at any time. SIM900_DDET_Application Note_V1.00 2011.06.17 4
    Smart Machine Smart Decision AT COMMAND  DTMF detection can be set or activated by DDET command. AT+DDET AT+DDET Write Command AT+DDET= Response OK or ERROR or +CME ERROR: Parameters 0: disable DTMF detection 1: enable DTMF detection Reference Note This command only can be set when sim card is available and cpin is ready. This command cannot be set during a call. If you want use this function, we suggest setting this command before dialing a call. Switch of f Sidetone algorithm may benefit to the accuracy of DTMF detection. When a call is connected, DTMF detection will start in 300ms “1,2,3,4,5,6,7,8,9,0,#,*”only these DTMF strings can be detected SIM900_DDET_Application Note_V1.00 2011.06.17 5
    Smart Machine Smart Decision //set up a call and wait for call connected //report DTMF value //enable DTMF detection Example： AT+DDET=1 Set up a call connection ATD***********; OK If module detected DTMF, URC will be reported via serial port +DTMF:1 +DTMF:2 +DTMF:3 +DTMF:4 +DTMF:5 +DTMF:6 +DTMF:7 +DTMF:8 +DTMF:9 +DTMF:0 +DTMF:# +DTMF:* Receive an incoming call RING ATA; OK If module detected DTMF, URC will be reported via serial port //answering an incoming call SIM900_DDET_Application Note_V1.00 2011.06.17 6
    Smart Machine Smart Decision //report DTMF value +DTMF:1 +DTMF:2 +DTMF:3 +DTMF:4 +DTMF:5 +DTMF:6 +DTMF:7 +DTMF:8 +DTMF:9 +DTMF:0 +DTMF:# +DTMF:* SIM900_DDET_Application Note_V1.00 2011.06.17 7
    Smart Machine Smart Decision Contact us: Shanghai SIMCom Wireless Solutions Ltd. Add: Building A, SIM Technology Building, No.633 Jinzhong Road, Changning District, Shanghai, P. R. China 200335 Tel: +86 21 3252 3300 Fax: +86 21 3252 3301 URL: www.sim.com/wm SIM900_DDET_Application Note_V1.00 2011.06.17 8
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