摘 要:隨著通信事業(yè)的發(fā)展,基于GSM的移動(dòng)終端應(yīng)用已日益廣泛。在研究Siemens公司生產(chǎn)的TC35i GSM模塊的基礎(chǔ)上,給出一種由TC35i構(gòu)成的移動(dòng)終端硬件電路設(shè)計(jì)和SMS編碼方法,包括構(gòu)成終端的數(shù)據(jù)通信電路、SIM卡電路、電源及啟動(dòng)電路,并探討了在設(shè)計(jì)過程中遇到的問題和解決的方法。該設(shè)計(jì)可以完成短消息的收發(fā),與PC機(jī)進(jìn)行數(shù)據(jù)傳輸?shù)裙δ堋R殉晒?yīng)用在基于GPS和GSM網(wǎng)絡(luò)的新型汽車防盜系統(tǒng)中。關(guān)鍵詞:GSM模塊; TC35i; AT指令; SMS; 消息編碼
中圖分類號(hào):TN911-34; TP391 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1004-373X(2010)16-0157-03
Design and Application of SMS Based on TC35i GSM Module
HE Guang-yu, LI Tai-quan
(School of Physical Science and Technology, Yangtze University, Jingzhou 434023, China)
Abstract: With the development of communications, the application of mobile terminal based on GSM becomes increasingly wide. The hardware circuit design and SMS coding method of TC35i-based mobile terminals (compised of data communication circuit, SIM card circuit and power supply circuit) are presented based on the reseach of TC35i module produced by Siemens. The problems encountered in the design process and their solutions are investigated. This design can achieve the transceiving of short messages, data transmission with computers and other functions. It has been successfully applied to the new type of car security system based on GPS And GSM Network.
Keywords: GSM module; TC35i; AT command; SMS; message encoding
0 引 言
GSM(global system for mobile communications)全球移動(dòng)網(wǎng)絡(luò)是目前覆蓋范圍最廣的移動(dòng)通信網(wǎng)絡(luò),SMS短消息服務(wù)是GSM終端之間通過服務(wù)中心進(jìn)行文本信息收發(fā)的應(yīng)用服務(wù),SMS服務(wù)作為GSM網(wǎng)絡(luò)的一種基本業(yè)務(wù),已經(jīng)得到越來越多系統(tǒng)運(yùn)營(yíng)商和系統(tǒng)開發(fā)商的重視。SMS以其實(shí)現(xiàn)簡(jiǎn)單,抗干擾能力強(qiáng),強(qiáng)通信成本低等特點(diǎn),在遠(yuǎn)程無線監(jiān)控系統(tǒng)、數(shù)據(jù)采集系統(tǒng)、遠(yuǎn)程無線傳輸、車輛監(jiān)控定位系統(tǒng)等領(lǐng)域中得到了廣泛的應(yīng)用[1-6]。本文選用Siemens公司的GSM模塊TC35i,給出其應(yīng)用方案、外圍電路設(shè)計(jì)及軟硬件實(shí)現(xiàn)。
1 TC35i模塊簡(jiǎn)介
TC35i是Siemens公司推出的新一代無線通信GSM模塊,可以快速安全可靠地實(shí)現(xiàn)系統(tǒng)方案中的數(shù)據(jù)、語音傳輸、短消息服務(wù)(SMS)和傳真。模塊的工作電壓為3.3~4.8 V,可以工作在900 MHz和1 800 MHz兩個(gè)頻段。具有AT命令集接口,支持文本和PDU模式的短消息、傳真。此外,該模塊還具有電話簿功能、多方通話、漫游檢測(cè)功能。
該模塊功能上與TC35兼容,且設(shè)計(jì)緊湊,體積大大縮小。通過40PIN的ZIF連接器,實(shí)現(xiàn)電源連接、指令、數(shù)據(jù)、語音信號(hào)、及控制信號(hào)的雙向傳輸。……