Published on November 12, 2015
Do you have a room where you think the humidity is too high?
Put a moisture absorber in the room and keep an eye on the relative humidity with this Littlebits humidity indicator. It uses the KY015-DHT11 humidity sensor.
Duration: 3 hrs.
The sensor connected to the proto bit
Th complete indicator
The proto bit with the sensor connection.
I used the original INO file and changed it to be used with Littlebits.
The program normally stores the data from the humidity and the temperature in an array, and shows the values on the serial monitor of the connected computer.
I only used the array part for the humidity (stored in dat) to activate the number bit, the RGB LED and the Cloudbit. I used the serial monitor only for testing. I connected the Cloudbit to output 9 of the Arduino instead of connecting it to the number bit. The only reason was that it fitted nicely on just one mounting board.....
You could change the program and connect a second number bit to the Arduino for an indication of the temperature.
There is a warning RGB LED connected to the Arduino that lights up when the humidity reaches the level of 50% or more.
The Cloudbit sends the level to my smartphone. Now I can really check if the moisture absorber is working !