Arduino

Read Surrounding Temperature and Humidity Using Grove Beginner Kit

by suadanwar
October 23, 2020

Arduino, Grove

Have you ever wondered about the temperature and humidity of your surroundings?

Introduction

When air temperature increases☀️, air can hold more water molecules💧, and its relative humidity decreases. When temperatures drop⛅️, relative humidity increases.

Let’s check our surrounding temperature and humidity using this Grove Beginner Kit without doing any wiring. It’s so easy!

Video

This video shows how to read surrounding temperature and humidity using Grove Beginner Kit.

Hardware Preparation

This is the list of items used in the video.

Grove All In One Beginner Kit for Arduino

Sample Program

This is python3 sample program for sending a video to telegram. You can use it with Thonny Python IDE.

#include "DHT.h"

#include <Arduino.h>

#include <U8x8lib.h>

#define DHTPIN 3 

#define DHTTYPE DHT11 // DHT 11

DHT dht(DHTPIN, DHTTYPE);

U8X8_SSD1306_128X64_ALT0_HW_I2C u8x8(/* reset=*/ U8X8_PIN_NONE);

#define LED    4

#define PIEZO  5

float temp, humi;

void getReading(){

  temp = dht.readTemperature();

  humi = dht.readHumidity();

  u8x8.setFont(u8x8_font_chroma48medium8_r);

  u8x8.setCursor(0, 33);

  u8x8.print("Temp:");

  u8x8.print(temp);

  u8x8.print("C");

  u8x8.setCursor(0, 50);

  u8x8.print("Humidity:");

  u8x8.print(humi);

  u8x8.print("%");

  u8x8.refreshDisplay();

  delay(200);

}

void setup(void) {

  Serial.begin(9600);

  Serial.println("DHTxx test!");

  dht.begin();

  u8x8.begin();

  u8x8.setPowerSave(0);

  u8x8.setFlipMode(1);

  pinMode(LED, OUTPUT); 

  pinMode(PIEZO, OUTPUT);

}

void loop(void) {

  getReading();

  if (temp>32){

    digitalWrite(LED,HIGH);

    tone(PIEZO,1000,500);

    delay(700);

  }

  else{

    digitalWrite(LED,LOW);

    noTone(PIEZO);

  }

}