Mobile based temperature monitoring system (3)

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Mobile based temperature monitoring system (3)

  1. 1. Presented By: RANJAN TARAFDER SHIRSHAK SADHUKHAN MADHULINA SUR AJOY PAUL FAROOQUE AHMED
  2. 2. CONTENTS  Introduction  Basic block diagram of Monitoring device  Temperature sensor  ATMEGA32 microcontroller  MAX232  Time base circuit  Software description of Monitoring device  SMS Protocol  Application
  3. 3. INTRODUCTION Design and implementation of microcontroller based system for data logging and remote monitoring of parameters by Short message service (sms)
  4. 4. Basic Block Diagram of Monitoring Device
  5. 5. TEMPERATURE SENSOR An integrated circuit temperature sensor LM35 is used which has an analog output voltage. The output voltage of sensor is linearly proportional to temperature . These make LM35 good choice for ambient temperature monitoring.
  6. 6. FEATURE OF LM35 • Calibrated Directly in ° Celsius (Centigrade) • Linear + 10 mV/°C Scale Factor proportional to the Centigrade temperature. • Ensured Accuracy (at +25°C) LM35 • Rated for Full −55°C to +150°C Range • Suitable for Remote Applications • Low Cost Due to Wafer-Level Trimming • Operates from 4 to 30 V • Less than 60-μA Current Drain • Low Self-Heating, 0.08°C in Still Air • Nonlinearity Only ±¼°C Typical • Low Impedance Output, 0.1 Ω for 1 mA Load
  7. 7. ATMEGA32 MICROCONTROLLER  The Atmel®AVR®ATmega32 is a low- power CMOS 8-bit microcontroller  based on the AVR enhanced RISC architecture.  optimize power consumption versus processing speed.
  8. 8. MAIN FEATURES OF ATmega32  32K bytes of In-System Programmable Flash Program memory with Read-While-Write capabilities  1024 bytes EEPROM  2K byte SRAM  32 general purpose I/O lines  32 general purpose working registers  a JTAG interface for Boundary scan  On-chip Debugging support and programming  3 flexible Timer/Counters with compare modes  Internal and External Interrupts  a serial programmable USART  a byte oriented Two-wire Serial Interface  an 8-channel, 10-bit ADC  a programmable Watchdog Timer with Internal Oscillator  an SPI serial port  6 software selectable power saving modes
  9. 9. PIN CONFIGARATION
  10. 10. MAX 232  The MAX232 is an IC that converts signals from an RS-232 serial port to signals suitable for use in TTL compatible digital logic circuits.  The MAX232 is a dual driver/receiver and typically converts the RX, TX, CTS and RTS signals..
  11. 11. FEATURES OF MAX232  Input voltage levels are compatible with standard СMOS levels  Output voltage levels are compatible with EIA/TIA-232-E levels  Single Supply voltage: 5V  Low input current: 0.1μA at ТA= 25 °С  Output current: 24mA  Latching current not less than 450mA at ТA= 25°С  The transmitter outputs and receiver inputs are protected to ±15kV Air ESD
  12. 12. Time base circuit  A real-time clock (RTC) chip-DS1307 is used to keep track of the current time as Time base circuit.  The term often refers to the devices in personal computers, servers, and embedded systems.  RTCs are present in almost every electronic device which needs to keep accurate timing.
  13. 13. Some features of DS-1307  Real time clock counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap year compensation valid up to 2100  56 bytes of nonvolatile RAM for general storage of data  2 wire interface(I2C)  Automatic power fail detect  Consume less than 500 nA for battery backup at 25 degree centigrade
  14. 14. PIN diagram for DS-1307
  15. 15. SOFTWARE DESCRIPTION FLOWCHART
  16. 16. SMS PROTOCOL  The microcontroller sends current monitored parameters through SMS in the time interval specified by user. In present system Nokia-3310 mobile phone is interfaced to microcontroller, using Nokia F-Bus Protocol.
  17. 17. F BUS PROTOCOL  The FBUS protocol can also be used to recover other information, such as the phonebook, call logs, SMS messages, and calendar entries.  The FBUS frame is byte oriented.
  18. 18. AUTO SMS FORWARD SOFTWARE  Incase if android phones auto sms forward facility is available, but using an android phone is costly so a software on java will be developed to forward sms to a definite number.
  19. 19. APPLICATION  The presented system can be useful for studying behavior of Industrial and Home processes application having multiple parameters.  Point-to-point communication technology with the limitations of small bandwidth  No need of PC web server for remote monitoring and thus saves the cost.  With slightly modifying the firmware current monitored parameters  Can be sent to many users through SMS.

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