Serial Communication Using Gsm Modem
GSM/GPRS module is used to establish communication between a computer and a GSM-GPRS system. Global System for Mobile communication (GSM) is an architecture used for mobile communication in most of the countries. Global Packet Radio Service (GPRS) is an extension of GSM that enables higher data transmission rate. Fonepaw Iphone Data Recovery Key on this page.
Oct 10, 2014 Interfacing SIM900A GSM Modem with Arduino. TX void setup() { // Open serial communications and wait for port to open: Serial.begin(9600). On the hardware side you need a GSM module, also called GSM modem, that can be interfaced with the Raspberry Pi. Most modems uses a serial (RS-232) communication link and the good old (extended) Hayes command set, with the 'AT' prefix. This chapter is based on the SIM800 chip that is very versatile and available.
GSM/GPRS module consists of a GSM/GPRS modem assembled together with power supply circuit and communication interfaces (like RS-232, USB, etc) for computer. The MODEM is the soul of such modules. Wireless MODEMs are the MODEM devices that generate, transmit or decode data from a cellular network, for establishing communication between the cellular network and the computer. These are manufactured for specific cellular network (GSM/UMTS/) or specific cellular data standard (GSM/UMTS/GPRS//HSDPA) or technology (/SIM).
Wireless MODEMs like other MODEM devices use serial communication to interface with and need Hayes compatible for communication with the computer (any microprocessor or microcontroller system). Is pretty simple, i hav done SMS based e-votin system, sms remote control, sms based e banking application for diferent firms and individual befor.
I do it in 2 ways 1. Conect the Sagem phone(My x7,My V55,V56) modem to the 8051 serial inteface (green to GND,white to p3.0,blue line to p3. How To Install A52codec.component. 1 then send AT command strings to the d modem. Set the d nodem on text mode first(AT+CMGF=1 & CARRIAGE RETURN(ASCII(13)), AT+CMGL='REC UNREAD' CARRIAGE RETURN(ASCII(13)),, any new message will be red from the d phone modem via d controller UART lines 2. In the second method, i do use J2me on any Nokia phone using Messaging APIs(Message connections framework. But it requires 2 applications runing on 2 phones with the same message port number.
Then interface 1 one to the MCU using serialconnections protocol. Is pretty simple, i hav done dat befor wit JSF and also wit dot net. All u need to do is to implement AT commands using Microsoft Communication control 6.0 in the d dot net framework or u can develop a DLL that listens for an incoming message using this strings(AT + CMGS ='Recipientn phone number' + chr(13),then the message body + chr(26) UNREAD'. But u need to dedicated an internet computer which will hav a GSM phone modem interfaced to it. Then develop and publish a web service/ a web server side app using ASP.NET or JSF which will take take parameters like( userID, Message body, recipient phone number).
The URL of ur web server app will be made available to user, such that users can made HTTP request wit the above parameters. Mscomm1.setSettings('9600,N,8,1'); mscomm1.setDTRenabled(true); mscomm1.setRSEenabled(true); mscomm1.setPortOpen(true); mscomm1.setHandshaking(MscommLib.FLOW_CONTROL_NONE); the above code wil initialise the d computer on serial communication. For the d Phone Modem to send SMS, it must be in TEXT mode using AT+CMGF=1 + chr(13) mscomm1.setOutput('AT+CMGF=1' + chr(13); // the above wil set d modem on text mode, then on the Request event handler paste //Querry a database to kno if the user is authorised using the userID as criteria mscom1.setOutput('AT+CMGS=' + '/'+ Recipient phone number+/' + chr(13)); mscomm1.setOutput(message body + chr(26)). Cheers ucontroller, the programing and embeded system guru. Talk to me tru Gtalk wit this ID( add me to ur chat. Am always on line 24/7.
Is pretty simple. Solution from ucontroller (the embeded system guru of the continent add me on Gtalk to kno more tins from me usin d ID below or face book ID - Tsokoh Frank) all u need to do is to use an XP system, they are 2 files to be copied - 1. A setup from ur windows NT folder, from Drive C go to program file ->Windows NT folder copy Hyperterm and save it in a flash drive, then d second file is dll file from ur system 32 directory, go to Drive C->Windows->System32 folder den copy Hyperterm.dll and save in a flash drive. Den take d flash to ur Windows7 or Vista computer paste the setup in the same windows NT folder, paste the Hyperterm.dll file in the System 32 folder. Finaly paste the setup also in ur desktop and double click, u wil see ur Hyperterminal runnig sucessfully.
Cheers flex ur Hyperterminal.