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Το σχηματικό διάγραμμα του PCB με Temperature sensor (tempSensor PCB) δίνεται στο σχήμα παρακάτω.
Βασίζεται πάνω στον Temperature sensor LM335Z
http://grobotronics.com/images/datasheets/lm335.pdf
και τον Analog to Digital Converter MCP3002 - 2.7V Dual Channel 0-Bit A/D Converter with SPI Serial Interface
H επικοινωνία με το RPi βασίζεται πάνω στο Serial Peripheral Interface (spi) Bus.
"The Serial Peripheral Interface bus is a synchronous serial communication interface specification used for short distance communication, primarily in embedded systems. The interface was developed by Motorola in the mid 1980s and has become a de facto standard. SPI devices communicate in full duplex mode using a master-slave architecture with a single master. The master device originates the frame for reading and writing. Multiple slave devices are supported through selection with individual slave select (SS) lines." Source: wikiPediaΤο σχηματικό διάγραμμα με τον Temperature Sensor και τον A/D Converter δίνεται στη παρακάτω.
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