Hello trying to setup data logging of the humidity sensor and getting these errors. Very new to this so very little understanding. I have researched the libraries and understand i need to have the correct DS3231 and DHT libraries which i think i do.
Here is the code followed by the errors
/*
- Program to demonstrate Data Logging/Visualisation using Arduino
- ###Connection with SD card module###
- Vcc->5V
- Gnd->Gnd
- MISO->pin 12
- MOSI->pin 11
- SCK-> pin 13
- CS-> pin 4
- ###Connection with DS3231###
- Vcc->5V
- Gns->Gnd
- SCL->pin A5
- SDA-> pin A4
- ###Connection with DT11###
- Vcc->5V
- Gnd->Gnd
- Out-> pin 7
*/
#include <DS3231.h> //Library for RTC module (Download from Link in article)
#include <SPI.h> //Library for SPI communication (Pre-Loaded into Arduino)
#include <SD.h> //Library for SD card (Pre-Loaded into Arduino)
#include <DHT.h> //Library for dht11 Temperature and Humidity sensor (Download from Link in article)
#define DHT11_PIN 7 //Sensor output pin is connected to pin 7
DHT; //Sensor object named as DHT
const int chipSelect = 4; //SD card CS pin connected to pin 4 of Arduino
// Init the DS3231 using the hardware interface
DS3231 rtc(SDA, SCL);
void setup()
{
// Setup Serial connection
Serial.begin(9600);
Initialize_SDcard();
Initialize_RTC();
Initialize_PlxDaq();
}
void loop()
{
Read_DHT11();
Write_SDcard();
Write_PlxDaq();
delay(5000); //Wait for 5 seconds before writing the next data
}
void Write_PlxDaq()
{
Serial.print("DATA"); //always write "DATA" to Indicate the following as Data
Serial.print(","); //Move to next column using a ","
Serial.print("DATE"); //Store date on Excel
Serial.print(","); //Move to next column using a ","
Serial.print("TIME"); //Store date on Excel
Serial.print(","); //Move to next column using a ","
Serial.print(DHT.temperature); //Store date on Excel
Serial.print(","); //Move to next column using a ","
Serial.print(DHT.humidity); //Store date on Excel
Serial.print(","); //Move to next column using a ","
Serial.println(); //End of Row move to next row
}
void Initialize_PlxDaq()
{
Serial.println("CLEARDATA"); //clears up any data left from previous projects
Serial.println("LABEL,Date,Time,Temperature,Humidity"); //always write LABEL, to indicate it as first line
}
void Write_SDcard()
{
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
File dataFile = SD.open("LoggerCD.txt", FILE_WRITE);
// if the file is available, write to it:
if (dataFile) {
dataFile.print(rtc.getDateStr()); //Store date on SD card
dataFile.print(","); //Move to next column using a ","
dataFile.print(rtc.getTimeStr()); //Store date on SD card
dataFile.print(","); //Move to next column using a ","
dataFile.print(DHT.temperature); //Store date on SD card
dataFile.print(","); //Move to next column using a ","
dataFile.print(DHT.humidity); //Store date on SD card
dataFile.print(","); //Move to next column using a ","
dataFile.println(); //End of Row move to next row
dataFile.close(); //Close the file
}
else
Serial.println("OOPS!! SD card writing failed");
}
void Initialize_SDcard()
{
// see if the card is present and can be initialized:
if (!SD.begin(chipSelect)) {
Serial.println("Card failed, or not present");
// don't do anything more:
return;
}
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
File dataFile = SD.open("LoggerCD.txt", FILE_WRITE);
// if the file is available, write to it:
if (dataFile) {
dataFile.println("Date,Time,Temperature,Humidity"); //Write the first row of the excel file
dataFile.close();
}
}
void Initialize_RTC()
{
// Initialize the rtc object
rtc.begin();
//#### The following lines can be uncommented to set the date and time for the first time###
/*
rtc.setDOW(FRIDAY); // Set Day-of-Week to SUNDAY
rtc.setTime(18, 46, 45); // Set the time to 12:00:00 (24hr format)
rtc.setDate(6, 30, 2017); // Set the date to January 1st, 2014
*/
}
void Read_DHT11()
{
int chk = DHT.read11(DHT11_PIN);
}
/*void Read_DateTime()
{
// Send date
Serial.print(rtc.getDateStr());
Serial.print(" -- ");
// Send time
Serial.println(rtc.getTimeStr());
}*/
/void Read_TempHum()
{
Serial.print("Temperature = ");
Serial.println(DHT.temperature);
Serial.print("Humidity = ");
Serial.println(DHT.humidity);
// delay(1000);
}/
C:\Users\nicks\Documents\Arduino\sketch_jul25d\sketch_jul25d.ino:32:1: warning: declaration does not declare anything [-fpermissive]
DHT; //Sensor object named as DHT
^
C:\Users\nicks\Documents\Arduino\sketch_jul25d\sketch_jul25d.ino: In function 'void Write_PlxDaq()':
sketch_jul25d:67:21: error: expected primary-expression before '.' token
Serial.print(DHT.temperature); //Store date on Excel
^
sketch_jul25d:70:21: error: expected primary-expression before '.' token
Serial.print(DHT.humidity); //Store date on Excel
^
C:\Users\nicks\Documents\Arduino\sketch_jul25d\sketch_jul25d.ino: In function 'void Write_SDcard()':
sketch_jul25d:96:23: error: expected primary-expression before '.' token
dataFile.print(DHT.temperature); //Store date on SD card
^
sketch_jul25d:99:23: error: expected primary-expression before '.' token
dataFile.print(DHT.humidity); //Store date on SD card
^
C:\Users\nicks\Documents\Arduino\sketch_jul25d\sketch_jul25d.ino: In function 'void Read_DHT11()':
sketch_jul25d:142:14: error: expected primary-expression before '.' token
int chk = DHT.read11(DHT11_PIN);
^
exit status 1
expected primary-expression before '.' token
