Remote monitoring system of temperature and humidity based on GSM


Abstract:

            Embedded system is a specialized computer system that is part of a larger system or machine. Typically, an embedded system is housed on a single microcontroller board with the programs stored in ROM. Virtually all appliances that have a digital interface -- watches, microwaves, VCRs, cars -- utilize embedded systems.
         
               GSM (Global System for Mobile communications) is an open, digital cellular technology used for transmitting mobile voice and data services. GSM differs from first generation wireless systems in that it uses digital technology and time division multiple access transmission methods. GSM is a circuit-switched system that divides each 200 kHz channel into eight 25 kHz time-slots; GSM supports data transfer speeds of up to 9.6 kbit/s, allowing the transmission of basic data services such as SMS (Short Message Service). Another major benefit is its international roaming capability, allowing users to access the same services when traveling abroad as at home. This gives consumers seamless and same number connectivity in more than 210 countries. GSM satellite roaming has also extended service access to areas where terrestrial coverage is not available.
           
                      It is very important that temperature and humidity of environment is monitored for the High-quality environment the quality testing requires. Traditional monitoring system has many shortcomings, such as hard wiring, high transmission bit error rate, high costs and small coverage. This paper proposes a remote monitoring system of temperature and humidity based on GSM. Temperature sensor, humidity sensor and GSM communication technology are used in the system which performs data acquisition and transmission, and implements remote monitoring.
          The system is advanced in some fields, such as low transmission bit error rate, low costs and wide range of signal coverage. This paper proposes a new way to implement a remote monitoring system.
Hardware requirement:
  • GSM modem
  • Microcontroller
  • Temperature  sensor
  • Sensor interfacing circuit
  • Voltage converter
  • 5V power supply

Software requirement:
  • Embedded C
  • Keil compiler
  • Program downloader.


0 comments:

Post a Comment