Heater control using DHT11 module and Relay module.

This project was developed to control a small heater in my workshop, which got very cold and damp in the winter.  The project utilises the DHT11 library and code previously written to test the DHT11. Using the temperature and humidity output from the sensor, I calculated the dew point.  To ensure that the heater does not switch on at the Dew Point, I have added an offset, which in my case is 5 deg.