Published May 11, 2022 © LGPL

SG-2.0 Wireless Weather Station

In this paper we have presented how to implement a Weather Station to monitor different parameters.

IntermediateFull instructions provided459

Things used in this project

Hardware components

Bosch BMP180

Arduino Nano R3

RGB LCD Shield Kit, 16x2 Character Display

SparkFun Transceiver Breakout - nRF24L01+

DHT11 Temperature & Humidity Sensor (3 pins)

DHT22 Temperature Sensor

Rotary potentiometer (generic)

Maxim Integrated DS3231M - ±5ppm, I2C Real-Time Clock

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)

Story

In this paper we have presented how to implement a Weather Station[1] to monitor various parameters:

Temperature (indoor + outdoor);
Humidity (indoor + outdoor);
Pressure;
Altitude;

The practical project is based on the Arduino Nano Interface[2] and involves the use of modules and sensors:

NRF24L01 (radio-communications);
DHT22 (temperature and humidity sensor);
BMP180 (pressure and altitude sensor);
DS3231 (Real Time Clock module);

It was opted for practical construction using these sub-assemblies because they are cheap and easy to use and interconnect.

Indor Unity

Outdoor Unity

- Altitude and pressure sensor BMP180

The BMP180 is an ideal module for measuring atmospheric pressure, altitude as well as temperature, being an inexpensive and very easy to use module. It uses only I2C communications (A4 - SDA respectively A5 - SCL), measuring the absolute atmospheric pressure of the environment using a digital barometer.

In addition to the advantages of size and ease of implementation in projects, it has a very low current consumption of only 0.3uA.

- Temperature and humidity sensorDHT11/DHT22

These DHT modules are high performance temperature and humidity sensors ensuring high reliability and excellent stability. Temperature is measured using a negative temperature coefficient (NTC) thermistor and relative humidity is measured using a capacitive sensor. These sensing elements are pre-calibrated and the output is provided as a digital signal.The DHT11 is used for temperatures above 0oC, and for higher accuracy and longer operating range the DHT22 is used which can measure lower temperatures down to a maximum of -40 oC.

- ModulWireless NRF24L01

The NRF24L01 module is designed for wireless communications, using the SPI communications of the Arduino board. Being equipped with an antenna it can transmit data over longer distances (approx. 1000m in open field). The integrated circuit is a very high-function one, more details can be found in the datasheet. It has a very low power consumption (varies depending on the communication distance between the 2 modules).

- DS3231 Real Time Clock Module

The DS3231 is a highly accurate, low-cost I2C Real Time Clock (RTC) with an integrated temperature compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input and keeps the timer accurate when the main power to the device is interrupted.

Code

#include <DS3231.h>
#include <LiquidCrystal.h>
#include <DHT.h>
#include <DHT_U.h>
#include <RF24_config.h>
#include <Adafruit_Sensor.h>
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
#include <printf.h>
#include <Wire.h>

#define DHTPIN 8
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);   //initializare senzor DHT11

DS3231 rtc(SDA, SCL);   //initializare modul DS3231

RF24 myRadio(8, 9);    // initializare modul NRF24L01
byte addresses[][6] = {"0"};

const int rs = 7, en = 6, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);    //initializare LCD

int chk;   //variabila pentru citirea datelor de la DHT!1
int InTemp, InHum, OutTemp, OutHum, OutPress, OutAlt, bmptemp; //variabile

struct package  //packetul de date pe care il primeste
{
  float temperature ;
  float humidity ;
  float pressure;
  float altitude;
  float bmptemperature;
  float pressureseelevel;
};

typedef struct package Package;
Package data;




 void setup()
 { 
  lcd.begin(16, 2);
  dht.begin();
  Serial.begin(9600);

  rtc.begin();
  rtc.setDOW(FRIDAY);
  rtc.setTime(12, 0, 0);
  rtc.setDate(8, 3, 2022);

  myRadio.begin();
  myRadio.setChannel(115);
  myRadio.setPALevel(RF24_PA_MAX);
  myRadio.setDataRate( RF24_250KBPS );
  myRadio.openReadingPipe(1, addresses[0]);
  myRadio.startListening();
  delay(100);

  lcd.setCursor(0, 0);
  lcd.print("Arduino Weather");
  lcd.setCursor(4, 1);
  lcd.print("Station");
  delay(5000);
  lcd.clear();
  lcd.setCursor(2, 0);
  lcd.print("Developed By");
  lcd.setCursor(2, 1);
  lcd.print("  Serafim");
  delay(3000);
  lcd.clear();
  lcd.print("  Pornire....");
  delay(3000);
  lcd.clear(); 
 }



 void loop()
 {

  checkForWirelessData();

  lcd.setCursor(0,0);
  lcd.print("Date:");
  lcd.setCursor(6, 0);
  lcd.print(rtc.getDateStr());
  
  

  lcd.setCursor(0, 1);
  lcd.print("Time:");
  lcd.setCursor(6, 1);
  lcd.print(rtc.getTimeStr());
  delay(1000);

  lcd.setCursor(6, 1);
  lcd.print(rtc.getTimeStr());
  delay(1000);

  lcd.setCursor(6, 1);
  lcd.print(rtc.getTimeStr());
  delay(1000);

  lcd.setCursor(6, 1);
  lcd.print(rtc.getTimeStr());
  delay(1000);

  lcd.setCursor(6, 1);
  lcd.print(rtc.getTimeStr());
  delay(1000);
  lcd.clear();

  dht.read();
  InTemp = dht.readTemperature();
  InHum = dht.readHumidity();
  Serial.print("temp");
  Serial.print(InTemp);
  Serial.print("hum");
  Serial.print(InHum);


  lcd.setCursor(0, 0);
  lcd.print("InTemp:");
  lcd.setCursor(9, 0);
  lcd.print(InTemp);
  lcd.print("*C");

  lcd.setCursor(0, 1);
  lcd.print("InHum:");
  lcd.setCursor(9, 1);
  lcd.print(InHum);
  lcd.print("%");

  delay(5000);
  lcd.clear();

  

  lcd.setCursor(0, 0);
  lcd.print("OutTemp:");
  lcd.setCursor(9, 0);
  lcd.print(OutTemp);
  lcd.print("*C");

  lcd.setCursor(0, 1);
  lcd.print("OutHum:");
  lcd.setCursor(9, 1);
  lcd.print(OutHum);
  lcd.print("%");
  delay(5000);
  lcd.clear();


  lcd.setCursor(2, 0);
  lcd.print("  Presiune");
  lcd.setCursor(4, 1);
  lcd.print(OutPress);
  Serial.print(OutPress);
  lcd.print(" hPa");
  delay(5000);
  lcd.clear();


  lcd.setCursor(1, 0);
  lcd.print("  Altitudine");
  lcd.setCursor(3, 1);
  lcd.print(OutAlt, 1);
  Serial.print(OutAlt, 1);
  lcd.print(" metri");
  delay(5000);
  lcd.clear();


  lcd.setCursor(0, 0);
  lcd.print("Bmp Temperature");
  lcd.setCursor(5, 1);
  lcd.print(bmptemp);
  lcd.print("*C");
  delay(5000);
  lcd.clear();
 
 }



void checkForWirelessData()
{
  if ( myRadio.available())
  {
    while (myRadio.available())
    {
      myRadio.read( &data, sizeof(data) );
      OutTemp = data.temperature;
      OutHum = data.humidity;
      OutPress = data.pressure;
      OutAlt = data.altitude;
      bmptemp = data.bmptemperature;
    }
    Serial.print(data.temperature);
      Serial.print(data.humidity);
  }
}

#include <Adafruit_BMP085.h>
#include <DHT.h>
#include <DHT_U.h>
#include <Adafruit_Sensor.h>
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
#include <printf.h>
#include <RF24_config.h>
#include <Wire.h>

#define DHTPIN 8  
#define DHTTYPE DHT22

Adafruit_BMP085 bmp;

RF24 myRadio (8, 9);
byte addresses[][6] = {"0"};
const int led_pin = 7;

struct package
{
  float temperature;
  float humidity;
  float pressure;
  float altitude;
  float bmptemperature;
  float pressureseelevel;
};

typedef struct package Package;
Package data;

DHT dht(DHTPIN, DHTTYPE);


void setup()
{
  Serial.begin(9600);
  dht.begin();
  bmp.begin();
  pinMode(led_pin, OUTPUT);

  myRadio.begin();
  myRadio.setChannel(115);
  myRadio.setPALevel(RF24_PA_MAX);
  myRadio.setDataRate(RF24_250KBPS);
  myRadio.openWritingPipe(addresses[0]);
  delay(1000);
}



void loop()
{
  digitalWrite(led_pin, HIGH);
  readSensor();
  bmpSensor();
  Serial.print("hum");
  Serial.print(data.humidity);
  Serial.print("temp");
  Serial.print(data.temperature);
  myRadio.write(&data, sizeof(data));
  digitalWrite(led_pin, LOW);
  delay(5000);
}



void readSensor()
{
  data.humidity = dht.readHumidity();
  data.temperature = dht.readTemperature();
}

void bmpSensor()
{

  data.altitude = bmp.readAltitude();
  data.pressure = (bmp.readPressure()/100);
  data.bmptemperature = bmp.readTemperature();
  data.pressureseelevel = (bmp.readSealevelPressure()/100);

  Serial.print(data.altitude, 1);
  Serial.print(data.pressure,1);
  
  Serial.print("Temperature = ");
  Serial.print(bmp.readTemperature());
  Serial.print(" *C");

  Serial.print("Pressure = ");
  Serial.print(bmp.readPressure());
  Serial.print(" Pa");

  Serial.print("Altitude = ");
  Serial.print(bmp.readAltitude(), 1);
  Serial.print(" metri");

  Serial.print("Alt at Sea Level = ");
  Serial.print(bmp.readSealevelPressure(), 1);
  Serial.print(" metri");

 Serial.println();
 delay(1000);
}

Credits

serafim11

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SG-2.0 Wireless Weather Station

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

Indoor Unity

Outdoor Unity

Code

Indoor Unity

Outdoor Unity

Credits

serafim11

Comments

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SG-2.0 Wireless Weather Station

SG-2.0 Wireless Weather Station

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

Indoor Unity

Outdoor Unity

Code

Indoor Unity

Outdoor Unity

Credits

serafim11

Comments

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