🗂️ ماموریت ۱۰۰: ثبت دما روی کارت SD

سیم‌کشی

1. Arduino Uno (VCC5) ⟷ SD Card Module (VCC)
2. SD Card Module (GND) ⟷ Arduino Uno (GND1)
3. Arduino Uno (D10) ⟷ SD Card Module (CS)
4. Arduino Uno (D11) ⟷ SD Card Module (MOSI)
5. SD Card Module (MISO) ⟷ Arduino Uno (D12)
6. Arduino Uno (D13) ⟷ SD Card Module (SCK)
7. Arduino Uno (VCC5) ⟷ dht-sensor (VCC)
8. Arduino Uno (D2) ⟷ dht-sensor (DATA)
9. dht-sensor (GND) ⟷ Arduino Uno (GND2)

کد

// SD data logger: temperature + humidity every 2 s into data.csv
#include <SPI.h>
#include <SD.h>
#include <DHT.h>

DHT dht(2, DHT22);
const int CS = 10;

void setup() {
  Serial.begin(9600);
  dht.begin();
  if (!SD.begin(CS)) {
    Serial.println("No SD card!");
    while (true) delay(1000);
  }
  File f = SD.open("data.csv", FILE_WRITE);
  f.println("seconds,temp,humidity");   // header row for a spreadsheet
  f.close();
}

void loop() {
  float t = dht.readTemperature();
  float h = dht.readHumidity();
  File f = SD.open("data.csv", FILE_WRITE);
  if (f) {
    f.print(millis() / 1000);
    f.print(",");
    f.print(t);
    f.print(",");
    f.println(h);
    f.close();              // close = really saved on the card
    Serial.print("logged ");
    Serial.println(t);
  }
  delay(2000);
}