Mini Arduino Weather Station

by Technoesolution2020 in Circuits > Arduino

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Mini Arduino Weather Station

IMG_20210315_143736.jpg

Hello guy's welcome back to "Techno-E-Solution" in this article I'll show you how to make a Mini Weather Station Using Arduino nano & DHT 11 temperature sensor, To display the value of temperature I used OLED Display. We use DHT 11 temperature sensor because it measures the environmental temperature as well as it measures the surrounding humidity. This sensor measures humidity means the water drops in the air, usually, there are two electrodes in the DHT11 sensor which measure the electrical resistance between the two electrodes, so we use Arduino to read the DHT11 sensor value & then the Arduino converts this value & print the temperature on the DIsplay. So without wasting any time let's make it...

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MATERIAL REQUIRED

frank-wang-ogxlyCA1BQc-unsplash.jpg

To make this project we need some components (Best Buy Links are Provided):-

  1. Arduino Nano
  2. OLED Display (128x64)
  3. DHT11 Temperature Sensor
  4. Jumper Wires
  5. Breadboard

[ Above link are affiliated if you buy from the above link, We got some bonus from it. ]

CIRCUIT DIAGRAM

Mini Weather Station Circuit.png

Follow the Above circuit diagram to make the connection:-

Arduino >> OLED Display

5V - VCC

GND - GND

A4 - SDA

A5 - SCL

Arduino >> DHT11 Sensor

5V - (+ve) Pin

GND - (-ve) Pin

D3 - Out Pin

ARDUINO CODE

arduino_logo_1200x630-01.png

Copy the following code & Upload it to the Arduino.

I provide the Arduino Code file at bottom of the following Code.

/*
 * Hello friends Welcome To Techno-E-Solution
 * Here is the code for Mini Whether Station Using Arduino
 * Upload the following code to your Arduino
 * Subscribe to Our Youtube Chaneel :-  https://www.youtube.com/channel/UC_5HS4mSYyrLXwtX...
 */

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <DHT.h>
#include <Adafruit_Sensor.h>
#include <Fonts/FreeSans9pt7b.h>
#include <Fonts/FreeSansBold9pt7b.h>

#define dataPin 3
#define DHTTYPE DHT11
DHT dht(dataPin, DHTTYPE);

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

#define OLED_RESET 5
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define LOGO_HEIGHT   64
#define LOGO_WIDTH    128
  

const unsigned char myBitmap [] PROGMEM = {
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};





void setup() {
  Serial.begin(9600);
  dht.begin();

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // IF YOU GOT ERROR ON THIS LINE JUST CHAGE ( Address 0x3C To 0x3D for 128x64 )
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  testdrawbitmap();   
  delay(1000);
}

void loop() {
  float h = dht.readHumidity();                    // read humidity
  float t = dht.readTemperature();                 // read temperature
  float hic = dht.computeHeatIndex(t, h, false);   // compute head index for temp in °C

  // Printing the results on the serial monitor
  Serial.print("Temperature = ");
  Serial.print(t);
  Serial.print(" *C ");
  Serial.print("    Humidity = ");
  Serial.print(h);
  Serial.println(" % ");

  display.clearDisplay();
  display.setTextSize(1);             // Draw 2X-scale text
  display.setTextColor(WHITE);
  display.setFont(&FreeSansBold9pt7b);
  display.setCursor(0,13);
  display.print(F("Temp: "));
  display.setFont(&FreeSans9pt7b);
  display.drawCircle(105, 2, 2, WHITE);
  display.print(t);
  display.println(F(" C"));
  display.setFont(&FreeSansBold9pt7b);
  display.print(F("Humid: "));
  display.setFont(&FreeSans9pt7b);
  display.print(h);
  display.println(F("%"));
  display.setFont(&FreeSansBold9pt7b);
  display.print(F("Feels: "));
  display.setFont(&FreeSans9pt7b);
  display.print(hic);
  display.println(F(" C"));
  display.drawCircle(103, 45, 2, WHITE);
  display.display();
  
  delay(2000); // Delays 2 secods, as the DHT22 sampling rate is 0.5Hz
}

void testdrawbitmap(void) {
  display.clearDisplay();

  display.drawBitmap(
    (display.width()  - LOGO_WIDTH ) / 2,
    (display.height() - LOGO_HEIGHT) / 2,
    myBitmap, LOGO_WIDTH, LOGO_HEIGHT, 1);
  display.display();
  delay(2000);
}

Downloads

PocketWeatherStation.ino

PROJECT SETUP

IMG_20210315_143752.jpg
IMG_20210315_143828.jpg
IMG_20210315_143847.jpg
IMG_20210315_143853.jpg

I built this circuit on a breadboard.

NEXT PCB

PCB (2).png
PCB.png

If you want a Printed circuit board go through the NEXTPCB

Gerber File of the PCB :- Click To Download

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DEMO & TESTING

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