Arduino Temperature and Humidity sensor case (DHT11)

Summary

A case for a temperature and humidity sensor powered by an Arduino uno board.

The case fits:

- an Arduino uno - a small breadboard - a 16x2 LCD display - a DHT11 temperature and humidity sensor The parts are locked in place by melting the plastic pins with a soldering iron. The DHT11 is glued in place with hot glue.

Credits: The project is inspired by: https://www.progettiarduino.com/11-temperatura-e-umiditagrave-dht-11.html

Parts needed

3D Printed parts:

- 1x Top part of the case (Front_cover.stl) - 1x Bottom part of the case (Back_cover.stl) - 4x Feet (Feet.stl) Electronics:

- Arduino uno - a small breadboard - a 16x2 LCD display - a DHT11 temperature and humidity sensor - jumper cables (make sure they're long enough to reach) - 10k ohm potentiometer - a power brick / a 9v battery / usb cord to power the board Assembly:

- 4x M3 screws - Soldering Iron - Hot glue or other glue Software:

- Arduino IDE - LCD display library (LiquidCrystal.h library, see: https://docs.arduino.cc/learn/electronics/lcd-displays/ ) - DHT11 library from adafruit (DHT.h library, see: https://learn.adafruit.com/dht ) Code (the .ino file is in the download section):

#include <DHT.h>

#include <LiquidCrystal.h>

#define DHTPIN 8 // what digital the DHT11 is connected to

#define DHTTYPE DHT11 // DHT 11

DHT dht(DHTPIN, DHTTYPE); //set dht

LiquidCrystal lcd(12, 11, 5, 4, 3, 2); //set display (pin)

void setup() {

lcd.begin(16, 2);//initialise screen

lcd.print("Temperature");

lcd.setCursor(0,1);

lcd.print("Humidity");

Serial.begin(9600);

Serial.println("Arduino DHT11 Humidity and Temperature sensor");

dht.begin();//inizialise dht

}

void loop() {

// Wait a few seconds between measurements.

delay(5000);

//read temperature and humidity

float h = dht.readHumidity();

float t = dht.readTemperature();

// Check if any reads failed and exit early (to try again).

if (isnan(h) || isnan(t) ) {

Serial.println("Failed to read from DHT sensor!");

lcd.setCursor(0, 0);

lcd.print("FAIL ");

lcd.setCursor(0, 1);

lcd.print("FAIL ");

return;