This project started with a DS18B20 sensor and Flowcode V5. The aim was to build a controller to maintain the temperature within a Greenhouse. It has been developed overtime to its current incarnation using a PIC18F4550 at the heart of the design. I have added a Humidity sensor from Honeywell – the HIH5031 and a RTC clock module using the DS1307, which is freely available on the net.
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