Sending / receiving SMS using a GSM modem Application note

Transcription

1 Sending / receiving SMS using a GSM modem, English Version 1.0.4

2 2 General Copyright 2003 by WAGO Kontakttechnik GmbH & Co. KG All rights reserved. WAGO Kontakttechnik GmbH & Co. KG Hansastraße 27 D Minden Phone: +49 (0) 571/ Fax: +49 (0) 571/ [email protected] Web: Technical Support Phone: +49 (0) 571/ Fax: +49 (0) 571/ [email protected] Every conceivable measure has been taken to ensure the correctness and completeness of this documentation. However, as errors can never be fully excluded we would appreciate any information or ideas at any time. We wish to point out that the software and hardware terms as well as the trademarks of companies used and/or mentioned in the present manual are generally trademark or patent protected.

3 Table of Contents 3 TABLE OF CONTENTS 1 Important comments Legal principles Copyright Personnel qualification Intended use Range of validity Symbols Description Reference Material Solution Programming the Controller Sending / receiving SMS messages Parsing received messages LAMP (procedure) MESSAGE (procedure) Display Tables Various Initialization strings Files required... 12

4 4 Important comments 1 Important comments 1.1 Legal principles Copyright To ensure fast installation and start-up of the units described in this manual, we strongly recommend that the following information and explanation is carefully read and adhered to. This manual is copyrighted, together with all figures and illustrations contained therein. Any use of this manual which infringes the copyright provisions stipulated herein, is not permitted. Reproduction, translation and electronic and photo-technical archiving and amendments require the written consent of WAGO Kontakttechnik GmbH & Co. KG. Non-observance will entail the right of claims for damages Personnel qualification Intended use The use of the product detailed in this manual is exclusively geared to specialists having qualifications in PLC programming, electrical specialists or persons instructed by electrical specialists who are also familiar with the valid standards. WAGO Kontakttechnik GmbH & Co. KG declines all liability resulting from improper action and damage to WAGO products and third party products due to non-observance of the information contained in this manual. For each individual application, the components supplied are to work with a dedicated hardware and software configuration. Modifications are only admitted within the framework of the possibilities documented in the manuals. All other changes to the hardware and/or software and the non-conforming use of the components entail the exclusion of liability on part of WAGO Kontakttechnik GmbH & Co. KG. Please direct any requirements pertaining to a modified and/or new hardware or software configuration directly to WAGO Kontakttechnik GmbH & Co.KG.

5 Important comments Range of validity 1.3 Symbols This application note is based on the stated hardware and software of the specific manufacturer as well as the correspondent documentation. This application note is therefore only valid for the described installation. New hardware and software versions may need to be handled differently. Please note the detailed description in the specific manuals. Danger Always observe this information to protect persons from injury. Warning Always observe this information to prevent damage to the device. Attention Marginal conditions must always be observed to ensure smooth operation. ESD (Electrostatic Discharge) Warning of damage to the components by electrostatic discharge. Observe the precautionary measure for handling components at risk. Note Routines or advice for efficient use of the device and software optimisation. More information References to additional literature, manuals, data sheets and INTERNET pages

6 6 Description 2 Description This application example demonstrates how to send and receive short messages using a GSM modem. For demonstration purposes the "lamp" procedure has been used in this example. This procedure allows up to three parameters to be parsed. The procedure name and the parameters included in the message are separated by a comma. It is therefore possible to switch one or several lamps by sending a SMS message. To gain a better understanding of this procedure, arriving messages can be displayed and direct message input is possible before sending the message. For this application a standard mobile phone is used as GSM modem. The following mobile phones have been tested: Siemens S25 with Siemens data cable Siemens S35 with Siemens data cable Siemens S45 with Siemens data cable Nokia 6210 with DLR-3 data cable Ericson T68i with data cable Furthermore, the following GSM modules were tested: Siemens C35i Siemens M20T Siemens TC35i INSYS GSM small When using GSM modules, all AT commands that can be executed automatically should be deactivated (refer to manufacturer's manual). 3 Reference Material Manufacturer Name Version / Item No. WAGO Ethernet controller WAGO 4-channel dig. output module WAGO Serial interface RS / WAGO End module WAGO Interface module Siemens Siemens Data cable for S25..S45 Mobile phone S25 / S35 / S45 Nokia Data cable for 6210 DLR-3 Nokia Mobile phone

7 Solution 7 4 Solution TxD - (3) RxD - (2) RTS/CTS - (7+4) GND - (5) / Picture 4-1: GSM_SMS call up The standard interface module from WAGO (item no.: ) makes it possible to use a standard mobile phone data cable.

8 8 Programming the Controller 5 Programming the Controller Programming the controller includes sending / receiving SMS messages as well as parsing received messages (RPC interface). 5.1 Sending / receiving SMS messages Sending and receiving messages is done using the "GSM_SMS" module from the "SMS_01.LIB" library. Received messages are registred in the "RECEIVED_SMS" structure by the module (see picture 5.1-1) Picture 5.1-1: GSM_SMS call up Messages to be sent are registred in "SEND_SMS". The transmission is activated by setting the START_SEND_SMS parameter once (see also library description ML00300d).

9 Programming the Controller Parsing received messages Received messages are delivered to the SMS_RPC module to be parsed. This module first checks whether a new valid message has been received and decomposes the message into its individual parts by calling the "PARSE_SMS_MESSAGE" function. Subsequently, the individual parts of the message are located in the "message structure. The procedure name (function name) can now be parsed using an appropriate "IF command" and the corresponding procedure is called. Procedure calls can be added to the application by the user at any time, since this part of the program is located outside the library. Picture 5.1-2: call up interface (RPC) The "lamp" and "message" procedures have been implemented in this application example. For example, the second lamp (fisrt parameter following the procedure name) is switched on by a message containing "lamp,2,1,0 (second parameter). With the third parameter set, no return message needs to be sent afterwards.

10 10 Programming the Controller LAMP (procedure) WAGO-I/O-PRO 32 procedure example Category: Name: Used for: Demonstration LAMP Programmable couplers Parameter: Range: Comment: 1 ½ Addressing lamp => 1 -> 1st storey 2 -> ground 2 0/1 0 -> lamp off 1 -> lamp on 3 0/1 0 -> no return message 1 -> SMS return message to the sender Function description: Using this procedure, a digital output is switched on or off according to the parameters. After switching, a return message (SMS) is generated for the sender provided the third parameter is set to MESSAGE (procedure) WAGO-I/O-PRO 32 procedure example Category: Name: Used for: Demonstration MESSAGE Programmable couplers Parameter: Range Comment: None Function description: This procedure sends a return message (SMS) to the procedure initiator (sender nummer).

11 Display 11 6 Display The display supporting this application example is divided into three parts: the SMS reception window (blue), the SMS transmission window (green) and the picture of a building showing how the message is processed. Picture 6-1: Display

12 12 Tables 7 Tables 7.1 Various Initialization strings NOKIA_6210_INIT : STRING := 'ATE0 /AT+CMGF=0 /AT+CNMI=2,2,0,0,0 '; SIEMENS_S45_INIT : STRING := 'ATE0 /AT+CMGF=0 /AT+CNMI=1,1,0,0,1 '; SIEMENS_C35i_INIT : STRING := 'AT+CPIN=1234 /ATE0 /AT+CMGF=0 /AT+CNMI=1,1,0,0,1 //'; SIEMENS_M20_INIT : STRING := 'AT+CPIN=1234 /ATE0 /AT+CMGF=0 /AT+CNMI=1,1,0,0,1 /'; ERICSON_T68i_INIT : STRING := 'ATE0 /AT+CMGF=0 /AT+CNMI=3,1,0,0,0 /AT+CPMS="ME","ME" '; INSYS_GSM_SMALL_INIT : STRING := 'AT+CPIN=1234 /ATE0 /AT+CMGF=0 /AT+CNMI=1,1,0,0,1 /AT+CPMS="SM","SM","SM" /'; SIEMENS_TC35i_INIT : STRING := 'AT+CPIN="1234" /ATE0 /AT+CMGF=0 /AT+CNMI=3,1,0,0,1 /AT+CPMS="MT","MT", MT ' ; WESTERMO_GDW11_INIT : STRING := 'AT+CPIN=1234 /ATE0 /AT+CMGF=0 /AT+CNMI=1,1,0,0,1 /AT+CPMS="SM","SM","SM" /'; WAGO_761_510_INIT : STRING := 'ATE0+CMGF=0+CNMI=2,1,0,0,1+CPMS="MT","MT","MT" ///'; AT commands that can be executed automatically must be deactivated using appropriate software (refer to manufacturer's manual). 7.2 Files required Column headline GSM_SMS_01_lib.pro GSM_SMS_01.Lib Serial_Interface_01.Lib SerComm.Lib SerComm.HEX Standard.Lib Project example Protocol driver used to control a GSM modem Driver for serial interfaces Basic functionality of serial interfaces Hex file for basis functionality Standard functions

13 Tables 13 Standard.HEX Hex file for the standard functions

14 14 Tables

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