Project 7.9—SD Card-Based Temperature Data Logger

In this project, the design of a temperature data logger system is described. The ambient temperature is read every 10 s, and 100 records are stored on an SD card, or the contents of an already saved file are sent to the PC. The program is menu based, and the user is given the options of (Figure 7.84)
• Send saved temperature readings on the SD card to a PC.
• Save temperature readings in a new file on SD card.
• Append the temperature readings to an existing file on SD card.
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Figure 7.82 Circuit Diagram of the XC8 Version of the Project.
Figure 7.83 MPLAB XC8 Program.
Figure 7.84 Block Diagram of the ...

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