Publication: Temperature data logger via wireless system
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Date
2008-03-01
Authors
Thum, Kim Hoe
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Abstract
Temperature data logger is widely being used in the world today but most of the temperature data loggers were using microprocessor and microcontroller. However, this technology has its limitation in terms of cost, capacity and size of the device. To overcome this limitation, in this project FPGA technology will be implemented to design a wireless temperature data logger. This system will be fully controlled by an Altera FPGA processor model APEX – EP20K200EFC484-2X using software “Quartus II 7.2 sp2 Web Edition”. The main language used will be VHDL code. First, temperature will be measure by temperature sensor SHT75 and the data will be sent to the FPGA board for processing. Then, the FPGA board will send the data to the transceiver nRF905 to be transmitted in wireless to another transceiver nRF905 that perform as a receiver. The data received by the receiver will be sent to the FPGA board so that the board can process it and display the temperature value on the LCD. The temperature value will be display until one decimal point. The SHT 75 sensor could measure temperature in range of -40.0o C to 123.8o C and this is sufficient for the purpose of the project.