Arduino Greenhouse: humidity & temperature using 4 Channel Relay (Sensors: DS18B20, BME-280)

My first Arduino project in a long time... Took a few months to put this into motion, but came together in the course of a month once I started ordering parts.

CODE:  https://docs.google.com/document/d/12...

Project uses a DS18B20 and a BME-280 For environment monitoring, then some basic programming to maintain hysteresis (Low point, setpoint, high point)  so that the heater and Humidifier aren't oscillating on and off.  

Updates will include the addition of fans to improve air quality of room.