iwoox
Published © GPL3+

Weather Station With Wireless Data Transmitting

Upgrade of my previous project.

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Weather Station With Wireless Data Transmitting

Things used in this project

Hardware components

DFRobot weather station kit
×1
DFRobot Solar panel 5V
×1
Solar Power Manager 5V
DFRobot Solar Power Manager 5V
×1
DFRobot interface shield for Arduino
×1
I2C 16x2 Arduino LCD Display Module
DFRobot I2C 16x2 Arduino LCD Display Module
×1
DFRobot mouting kit
×1
DFRobot Arduino Uno
×1

Story

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Code

Code for transmitter

C/C++
#include <RH_ASK.h>
// Include dependant SPI Library 
#include <SPI.h> 


char                 databuffer[35];
double               temp;

void getBuffer()                                                                    //Get weather status data
{
  int index;
  for (index = 0;index < 35;index ++)
  {
    if(Serial.available())
    {
      databuffer[index] = Serial.read();
      if (databuffer[0] != 'c')
      {
        index = -1;
      }
    }
    else
    {
      index --;
    }
  }
}

int transCharToInt(char *_buffer,int _start,int _stop)                               //char to int
{
  int _index;
  int result = 0;
  int num = _stop - _start + 1;
  int _temp[num];
  for (_index = _start;_index <= _stop;_index ++)
  {
    _temp[_index - _start] = _buffer[_index] - '0';
    result = 10*result + _temp[_index - _start];
  }
  return result;
}

int WindDirection()                                                                  //Wind Direction
{
  return transCharToInt(databuffer,1,3);
}

float WindSpeedAverage()                                                             //air Speed (1 minute)
{
  temp = 0.44704 * transCharToInt(databuffer,5,7);
  return temp;
}

float WindSpeedMax()                                                                 //Max air speed (5 minutes)
{
  temp = 0.44704 * transCharToInt(databuffer,9,11);
  return temp;
}

float Temperature()                                                                  //Temperature ("C")
{
  temp = (transCharToInt(databuffer,13,15) - 32.00) * 5.00 / 9.00;
  return temp;
}

float RainfallOneHour()                                                              //Rainfall (1 hour)
{
  temp = transCharToInt(databuffer,17,19) * 25.40 * 0.01;
  return temp;
}

float RainfallOneDay()                                                               //Rainfall (24 hours)
{
  temp = transCharToInt(databuffer,21,23) * 25.40 * 0.01;
  return temp;
}

int Humidity()                                                                       //Humidity
{
  return transCharToInt(databuffer,25,26);
}

float BarPressure()                                                                  //Barometric Pressure
{
  float temp_rf;
  return temp / 10.00;
}

float hum;    // Stores humidity value in percent
float temp_rf;   // Stores temperature value in Celcius
float wind_speed;

//RF 
String str_humid;
String str_temp;
String str_wind_speed;
String str_out;
 
// Create Amplitude Shift Keying Object
RH_ASK rf_driver;

void setup()
{
   // Initialize ASK Object
  rf_driver.init();
  //
  Serial.begin(9600);
}
void loop()
{
  getBuffer();   
   
   delay(2000);

    hum = Humidity();
    temp_rf = Temperature();
    wind_speed = WindSpeedMax();

    //
    str_humid = String(hum);
    
    // Convert Temperature to string
    str_temp = String(temp_rf);
    
    //
    str_wind_speed = String(wind_speed);
 
    // Combine Humidity and Temperature
    str_out = str_humid + "," + str_temp;
    
    // Compose output character
    const char *msg = str_out.c_str();
    //const char *msg1 = str_wind_speed.c_str();
    
    rf_driver.send((uint8_t *)msg, strlen(msg));
    rf_driver.waitPacketSent();
    
    //rf_driver.send((uint8_t *)msg1, strlen(msg1));
    //rf_driver.waitPacketSent();
 
  Serial.print("Temperature: ");
  Serial.print(Temperature());
  Serial.println("C  ");
  Serial.print("Humidity: ");
  Serial.print(Humidity());
  Serial.println("%  ");
  Serial.println("");
}

Code for receiver

C/C++
//RTC
#include "GravityRtc.h"
#include "Wire.h"  

GravityRtc rtc;     //RTC Initialization

////////////////////////////////////////////////
//LCD
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

#define BACKLIGHT_PIN 3

LiquidCrystal_I2C lcd(0x20, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); 
///////////////////////////////////////////////////

// Include RadioHead Amplitude Shift Keying Library
#include <RH_ASK.h>
// Include dependant SPI Library 
#include <SPI.h> 
 
// Define output strings
 
String str_humid;
String str_temp;
String str_wind_speed;
String str_out;
 
// Create Amplitude Shift Keying Object
RH_ASK rf_driver;
 
void setup()
{

lcd.begin (20,4); //  
  // LCD Backlight ON
  lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
  lcd.setBacklight(HIGH);
  lcd.home ();
  //////////
  
    // Initialize ASK Object
    rf_driver.init();
    // Setup Serial Monitor
    Serial.begin(9600);

    //RTC
    rtc.setup();
    rtc.adjustRtc(2019,2,6,1,15,12,01);
}
 
void loop()
{
    // Set buffer to size of expected message
    uint8_t buf[11];
    uint8_t buflen = sizeof(buf);
    // Check if received packet is correct size
    if (rf_driver.recv(buf, &buflen))
    {
      
      // Message received with valid checksum
      // Get values from string
      
      // Convert received data into string
      str_out = String((char*)buf);
      
      // Split string into two values
      for (int i = 0; i < str_out.length(); i++) {
      if (str_out.substring(i, i+1) == ",") {
      str_humid = str_out.substring(0, i);
      str_temp = str_out.substring(i+1);
      break;
      }
    }
      
      // Print values to Serial Monitor
      Serial.print("Humidity: ");
      Serial.print(str_humid);
      Serial.print(" %");
      Serial.print("  - Temperature: ");
      Serial.println(str_temp);
      
      lcd.setCursor(0,0);
      lcd.print("Temperature: ");
      lcd.print(str_temp);
      lcd.print("C ");

      lcd.setCursor(0,1);
      lcd.print("Humidity: ");
      lcd.print(str_humid);
      lcd.print(" % ");

      //RTC
       rtc.read();
       lcd.setCursor(0,2); //0,3
       lcd.print("Date:");
       lcd.setCursor(0,3);
       lcd.print(rtc.day); 
       lcd.print(".");
       lcd.print(rtc.month);
       lcd.print(".");
       lcd.print(rtc.year);

       lcd.setCursor(13,2);
       lcd.print("Time:");
       lcd.setCursor(13,3);
       lcd.print(rtc.hour);
       lcd.print(":");
       lcd.print(rtc.minute);
      
       

    }
}

Credits

iwoox

iwoox

10 projects • 3 followers
Student at Faculty of Electrical Engineering and Computer Science.

Comments

Related channels and tags
  • DFRobot
  • Sustainability