implementation of web server using arm for intelligent monitoring
Contents
1. H3C HyperTerminal File Edt View Call Transfer Help D 58 OO Connects to remote system Fig 11 Hyper terminal in PC ASAR International Conference Bangalore Chapter 2013 ISBN 978 81 927147 0 7 90 Implementation Of Web Server Using Arm For Intelligent Monitoring HyperTerminal is terminal emulator capable of connecting to systems through TCP IP Networks Dial Up Modems and COM ports First install Hyper terminal software then Go to Start gt Programs gt Accessories gt Communications gt HyperTerminal HyperTerminal Window will open If we connect hardware with the com port of PC temperature gas and humidity values are continuously transferred to this window as shown per Fig 11 through serial communication SPI protocol This needs serial data transfer program which is dumped in hardware posuere ot ginn Fig 12 Hardware Part Fig 12 shows interfacing of ARM processor sensors and LCD Here 3 sensor are interfaced with ARM processor LCD shows output If we connect this hardware with Com port of PC through RS232 interface These values will be transferred to HyperTerminal on PC as shown in Fig 11 If we connect ethernet interface with this hardware Values will be transferred on website Fig 13 shows output on website BD hots treton Di be Yew Moy Doinei oom pie Mea teb Cimpa tods Tete L nomi E facebook P Googe C G0 anced jpeatiipa ED Toulube L PMCT L ia a taping Fros Douniaa2. FCS Fig 6 IEEE 802 3 Frame Format SFD start frame delimiter DA destination add FCS Frame check sequence SA Source add VI TCP IP PROTOCOL The software running on the embedded web server follows the same layered structure as used in the TCP IP protocol suite The TCP IP protocol suite allows computers of all sizes running different operating systems to communicate with each other The TCP IP protocol suite is a combination of different protocols at various layers as shown in Fig 7 Application Telnet FTP HTTP Transport TCP UDP Network IP ICMP Fig 7 Layers of TCP IP protocol suit Interface card Every layer acts independently from each other The Link Layer normally includes the device driver in the operating system and the corresponding network interface card in the computer An Ethernet controller driver controls the Ethernet interface The network layer controls the communication between hosts on the Ethernet The Address Resolution Protocol ARP at network layer translates IP addresses to Ethernet MAC addresses Internet Protocol IP delivers packets to Transmission Control Protocol TCP UDP and Internet Control Message Protocol ICMP the ICMP answers to ASAR International Conference Bangalore Chapter 2013 ISBN 978 81 927147 0 7 89 Implementation Of Web Server Using Arm For Intelligent Monitoring PING requests TCP UDP delivers data to the applications HTTP runs on the top of TCP
3. Web Server Using Arm For Intelligent Monitoring and given to the LAN controller of the client system The LAN controller sends the request to the router that processes and checks for the system connected to the network with the particular IP address If the IP address entered is correct and matches to that of the server a request is sent to the LAN controller of the server and a session is established and a TCP IP connection is establishes and the server starts sending the web pages to the client through which we can remotely monitor and control the sensor and device status respectively II SYSTEM DESIGN p1 16 1 23 f Da bus bit PEP 58900 Ethernet AX Rud Controller Y Add bus Sbit P04P07 P0 15 oe MAX232 RS232TOPC tty 14 00 0 PL gt INTR P0 8 P0 9 Ps lj Program and Debug Client 1v Relay JORB JOWB a Built ADC a Humidity Sensor a Sensor Fig 2 Embedded Web Server Module As shown in Fig 2 system is mainly composed of ARM Processor module Ethernet Module and SPI communication module Here all the devices which we want to monitor are connected to processor through sensors LPC2129 microcontroller interfaces with three sensors using P0 27 29 of an on chip Analog to Digital converter ADC Converted digital data will be sending out by DOUT pin of the chip Port pin P1 19 of LPC2199 is used with relay driver circuit for controlling action We have consi
4. IMPLEMENTATION OF WEB SERVER USING ARM FOR INTELLIGENT MONITORING PRATIK PADIA 7R MANOHARI SANDEEP KETHI REDDI MTech Asst Prof Sr G MTech Department of Electronics and Communication Engineering SRM University TamilNadu India Abstract An embedded system is a computer system designed for specific control functions within a larger system often with real time computing constraints But when networking technology is combined with it the scope of embedded systems would be further more Here design and implementation of embedded web server is presented That can be used for electrical equipment monitoring system In h w design ARM MP LPC2129 from NXP is used Sensors are interfaced with microcontroller Parameters like temperature humidity gas are measured and transmitted to PC through serial protocol SPI The received values in PC are uploaded in internet by Ethernet cable So by typing IP address in web browser client can monitor all devices in industry from any remote places via its own local browser Ethernet communication is depicted and data flow is analyzed last When RTOS is incorporated into this system more devices could be controlled and monitored In industry single ARM board acts as data acquisition and control system and as a web server also so the system is less compact with less complexity Keywords ARM processor Web server SPI TCP IP Hyper terminal KEIL I INTRODUCTION The arrival of internet reduced th
5. IP protocol It is set of the rules for transferring files like text image sound and other multimedia file on the World Wide Web When Web The applications can communicate with the transport layer through buffers with data and variables with control information As soon as a Web user opens their Web browser the user is indirectly making use of HTTP When you are set up with direct access to the Internet your computer 1s provided with a copy of the TCP IP program VII SPI COMMUNICATION Serial to Peripheral Interface SPI is a hardware firmware communications protocol developed by Motorola sometimes SPI is also called a four wire serial bus It is developed primarily for the communication between host processor and peripherals at high speed The SPI bus which operates at full duplex is a synchronous type data link setup with a Master Slave interface and can support up to 1 mega baud or 1OMbps of speed Both single master and multi master protocols are possible in SPI Due to this high speed aspect the bus lines cannot be too long because their reactance increases too much and the Bus becomes unusable An SPI protocol specifies 4 signal wires 1 Master Out Slave In MOSI MOSI signal is generated by Master recipient is the Slave 2 Master In Slave Out MISO Slaves generate MISO signals and recipient is the Master 3 Serial Clock SCLK or SCK SCLK signal is generated by the Master to synchronize data transfers betw
6. ariety of networking application V ETHERNET INTERFACE DESIGN Ethernet provides services corresponding to Layers 1 and 2 of the OSI reference model It 1s standardized as IEEE 802 3 It specifies bus topology with connecting cable with both station and the actual network medium Ethernet interface consists of MAC controller and PHY interface MAC layer is responsible for data packaging closing sending and receiving As shown in Fig 4 LPC2129 is embedded with MAC but does not provide physical interface So it uses CS8900 chip to provide Ethernet access channels CS8900A is a low cost Ethernet LAN controller for embedded applications Its highly integrated design eliminates the need for costly external components required by other Ethernet controllers ASAR International Conference Bangalore Chapter 2013 ISBN 978 81 927147 0 7 88 Implementation Of Web Server Using Arm For Intelligent Monitoring Ethernet or USB cable to Internet connection Computer 1 jmi l Ethemet Computer 2 ees cables Computer 3 Game Console Fig 5 Ethernet Routing As shown in Fig 5 most but not all wired network routers allow up to four devices to be connected via Ethernet cable A wireless access point consumes one of these available ports but it then enables many dozens of WiFi devices to join the network All devices connecting to an Ethernet router must possess a working Ethernet network adapter All devices connec
7. ble for enhancing security in industrial conditions by remotely monitoring various industrial appliances I EMBEDDED WEBSERVER Data Flash Memory Digital Inputs Analog Inputs Ethernet Controller Microcontroller a gt RJ45 interface t Client PC Fig 1 Embedded Web Server Module Power supply The implementation of embedded Internet technology is achieved by means of the embedded web server It runs on embedded system with limiting computing resources to serve web documents including static and dynamic information about embedded system to web browser We can connect any electronic device equipment to web server and can obtain the real time status information and control remote equipments without time and space restriction through web page released by embedded web server As shown in Fig l Embedded server is a single chip implementation of the Ethernet networking standard It consists of two primary elements communicating with each other 1 a server consisting of an ARM processor with an Ethernet controller and 11 a client computer which is connected to controller through this RJ45 interface The client computer sends receives data to from the arm microcontroller using TCP packets The client has to enter IP address to access this server This request is taken by the operating system of the client ASAR International Conference Bangalore Chapter 2013 ISBN 978 81 927147 0 7 87 Implementation Of
8. dered relay driver for experiment purpose Ethernet data communication between microcontroller and a remote web client is performed using the CS8900 ethernet controller Specifically the CS8900 receives reference commands from the remote web client and communicates the same to the microcontroller In addition in built 10 bit adc converts sensors analog data into digital data and sends value to LCD These measured values are transmitted to PC through serial protocol SPI Values are uploaded on internet through Ethernet cable So all devices are connected to PC through internet When client types IP address on web browser he will get web page that contains all parameters like temperature humidity and gas IV ARM LPC2129 Fig 3 shows ARM LPC2129 development kit Lpc2129 is 32bit ARM7TDMI S CPU with 256 Kbytes Program Flash 16 Kbytes on chip RAM 2x UARTs I2C 2x SPI 2x 32 bit Timers 2x CAN Four channel 10 bit ADC PWM WDT 46 General propose 5V tolerant I O pins On chip crystal oscillator with operating range up to 60 MHz CS8900 Ethernet interface Standard JTAG connector 24LC515 EEPROM for external web storage E an seit 8 Da RER Fhe N ji k 0 0 i St Fig 3 LPC2129 ARM development board w An SY T ARM has high speed of execution and powerful information processing capability The capacity of multi parameter execution multilevel monitoring and networking of ARM processor makes it suitable for wide v
9. dtom t j Hew Fokia Mi 3 WEB BASED REAL TIME REMOTE MONITORING temperature 15 C humidity 47 gas 340 Status Normal mes e 2 OnB Noa amea Fig 13 Values are transferred on Website CONCLUSION Implementation of web server using ARM for intelligent monitoring is a new method to monitor a environment which designed here for the prototype By using 32 bit ARM Microcontroller the embedded system becomes highly precise and gives better performance over traditional 8 16 bit Microcontrollers The system can also communicate with PC through RS 232 Serial Port It supports online supervision and control not only within Private Network LAN but also in Public Network Internet The whole system has low cost good openness and portability and is easy to maintain and upgrade It is possible to interface different kind of sensors with these modules and make various applications So it can monitor embedded system operation state through Internet achieving network monitoring purposes Hence for our future we make the system for industrial domestic environment monitoring for Ocean environment monitoring Educational Institution electric power petroleum etc REFERENCES 1 Wenqi Zhang Shugang Xie The ARM embedded common steel module and integrated system design examples M Beijing China electronic industry press October 2008 2 Zhao Hai Embedded Internet an information technology revolution of 21st century Beijing T
10. e whole world communication boundary to that of a single village After the everybody in internet wave now obliviously follows the everything in the internet wave When the embedded device are provided with internet access it is of no doubt that demand will rise due to the remote accessing capability of the devices The paper includes complete implementation of an HTTP Web Server in arm ARM7 microcontroller ARM 7 LPC 2129 development kit which contains Ethernet interface are connected to PC using RJ45 cable Sensors are connected to ARM board Temp Gas Humidity pressure motion speed are must often measured parameters Some electronic circuits chemical reactions biological processes perform best with in limited temperature humidity range It is also necessary to measure gas in environment These parameters are mostly used in power plants chemical industry hospital medicine Production Company In this paper embedded systems and Internet technology are combined to form a new technology the Embedded Internet Technology which developed with the popularization of computer network technology in recent years The heart of communication is TCP IP protocol Network communication is performed by the IEEE 802 3 Ethernet standard It is the most modern technology of embedded systems Since ARM processor has fast execution capability and Ethernet standard can provide internet access with reasonable speed this system is suita
11. een the master and the slave 4 Slave Select SS from master to Chip Select CS of slave SS signal is generated by master to select individual slave peripheral devices The SS CS is an active low signal Among these four logic signals two of them MOSI amp MISO can be grouped as data lines and other two SS amp SCLK as control lines SDI SDO cs Fig 8 SPI implementation During each SPI clock cycle a full duplex data transmission occurs 1 the master sends a bit on the MOSI line the slave reads it from that same line 2 the slave sends a bit on the MISO line the master reads it from that same line In our system to enable serial communication arm kit is connected to PC via COMI port at baud rate of 2400 using RS232 serial communication standard So values of sensors are transferred to PC VIII SOFTWARE LEVEL COMPILATION The firmware development for the system operation is done in Embedded C language in KEIL software we have to create code for four modules First is adc module that code can convert sensor data into digital data Second is uart module in which data can be transferred to pc via serial protocol Third is LCD module which shows values Three module compilation is done in KEIL software as shown in Fig 10 Fourth module is to transfer data into website Fourth module compilation is done in visual studio software It is also used to design website as shown in Fig 12 These modules coding is dumped
12. into ARM development kit by using Keil Ulink USB JTAG Debugger The Keil ULINK family of adapters connect the USB port of the PC to the JTAG port of your target board allowing to download and debug embedded programs running on target hardware There are many different technologies to achieve dynamic Web page commonly used with CGI ASP PHP and JSP and so on The ASP improves the speed of communication between devices and web server ASP provides an access to execute external program for Web server this server technology can be made to interact between the browser and server ASP programs can be written by any programming language for example VB VC or C Here VB is used to create dynamic webpage Dynamic Webpage is shown in Fig 12 gj 11 pVision3 C Users pratik Desktop FULL final CODE main c E File Edit View Project Debug Flash Peripherals Tools SVCS Window Help E A E Sa al o Ha alala BE sere gt ies e w A Targeti a Project Workspace O01 23 Target 1 one By Source Group 1 003 4 Startup s 004 inclu maine 005 E ipezh 008 igned 007 aS 008 un ned vart oa 3 ade mo 1 are 013 a4 015 O16 O17 ms amp og Grala 021 sesso 022 023 1 Ou 024 Adar eerie eas 025 B 20 e EB _ mne B ace B lode B ute Build A Command A Find in Files 7 Ika Seis Cf lsiGlsia 37 Wlelsl y Fig 10 Code compilation in keil software
13. singhua University Press 2002 pp 198 225 3 You He Guohong Wang Dajin Lu ect Multisensor information fusion with applications M Beijing Publishing house of electronics industry March 2000 4 Deheng Zhu Zhang Yan Kexiong Tan ect The electric equipment condition monitoring and fault diagnosis technology M Beijing Chinese electric power press March 2009 5 Manivannan M and Kumaresan N Design of On line Interactive Data Acquisition and Control System for Embedded Real Time Applications International Conference on Conclusion 6 Mi Joung Choi Hong Taek Ju Hyun Jun Cha Sook Hyang Kim and J Won Ki Hong An Efficient Embedded Web Server for Web based Monitoring 7 Rasmitha Kothapalli Suman M An innovative cost effective Ethernet gateway based on embedded Ethernet serial device Feb 2012 8 B Rajesh Kumar Member IEEE K Sridharan Senior Member IEEE and K Srinivasan The Design and Development of a Web Based Data Acquisition System ieee transactions on instrumentation and measurement vol 51 no 3 june 2002 9 Hua Fu Tao Wang Cui Yang Gas monitoring system based on ARM and information fusion J Application of electronic technique 2009 11 39 42 10 ARM Lpc2129 User Manual KK ASAR International Conference Bangalore Chapter 2013 ISBN 978 81 927147 0 7
14. ting a wireless access point must possess a working WiFi network adapter ou a MH EEPROM YTAL Ih Attachment Unit Interface ALN Fig 6 CS8900 Ethernet Controller diagram In this design External Ethernet controller is interfaced with processor As shown in Fig 6 The CS8900A includes on chip RAM 10Base T transmit and receive filters and direct ISA Bus interface with 24 mA drivers Here external bus 1s used If parallel bus is used then network traffic is slow So in this system SPI protocol is used for serial communication between processor and Ethernet controller This controller has internal DMA module for fast data throughput and hardware assistated IP checksum calculations The data of Ethernet is grouped into bytes often called frames As shown in Fig 6 An IEEE 802 3 Ethernet frame consists of a 14 byte header 46 to 1500 bytes of data and an optional 4 byte cyclic redundancy check 14 byte header consists of 6 byte source address 6 byte destination address and 2 byte length field The start of the frame is preamble which is of 7 bytes length It contains sets of OLis and 1 s arranged alternately The frame terminates with a 32 bit checksum that performs CRC checking to identify if any error is present All the stations see the frames regardless of whether they represent an intended destination If so frame is passed to higher protocol for processing Size Octets Packet
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