Sending sms or call with pic microcontroller

Abstract

Reading and recording values of several physical quantities such as temperature, humidity and pressure and sending SMS or call to the user at unwanted values of these quantities prevent financial losses and losses of life occurring in several industrial companies. For instance, stable or mobile cold storages, laboratories, data processing rooms, nuclear power plants, electric motors, car engines, industrial boilers and furnace, health and food sector, libraries and museums are the places that should be managed by monitoring and controlling temperature values. Accordingly, a PIC microcontroller-controlled measuring, recording and early warning system is developed in this study. Warning is sent by GPRS modem. When unwanted measurement value is occurred, PIC microcontroller gives the appropriate logic signal that activates modem. Recording operation can be done at 12 bit resolution with intended time period. However, recording capacity is limited by PIC’s EEPROM. If required, recording capacity can be increased with AT24C512 EEPROM. In this paper, developed system’s set up and operation are discussed in detail.