#moduleRH

[nomiabalone]

Progress 1# ~ RH and Temp Module

Proposal for reference 

So my approach to this Something Awesome Project is to build each circuit of the modules first and test them as individual units before integrating them into the Central Control system. I’ve started with the simplest module which i believe is the Relative Humidity and Temperature Control Module.

1. Understanding the temperature and RH of my bathroom

I put a barometer in my bathroom as a control to understand what temperature and RH is reached after a shower. I’ve noticed that the normal RH is around 62% but after a shower it reaches over 84%. If I open the door after the shower a fraction with the fan on, it takes around 15 mins to dissipate the steam but with the door completely open, it takes the steam around 8 mins to dissipate. Therefore, this module will turn on the fan when the RH reaches over 80% and will switch off at 62%.

2. Research

I used this site to base off my research which recommended a DHT11 sensor. However CREATE only sold DHT22, which was easy to adapt. It proved to be even better for me because it had its own built in resistor. 

3. The Build and Sketch

This is a schematic of my build:

This is as photo of my build:

This is my own Arduino Sketch: here

4. Testing

I used the Serial Monitor to output the temperature and RH readings. When I blew on it, it successfully rose as expected and dropped after a few minutes.

I also used the BUILTIN_LED, which is pin13 on the Arduino to turn on when the RH was higher than a certain amount (80% for testing purposes only). This also worked as well which I’m really happy about.