Using DHT 11 Sensor with 8-Pin OLED Display

1#include <SPI.h>
2#include <Adafruit_GFX.h>
3#include <Adafruit_SSD1306.h>
4#include <dht11.h>
5
6// OLED display width and height
7#define SCREEN_WIDTH 128
8#define SCREEN_HEIGHT 64
9
10// Define SPI pin connections
11#define OLED_CLK 13    // Clock
12#define OLED_MOSI 11   // Data input (DIN)
13#define OLED_CS 10     // Chip select
14#define OLED_DC 9      // Data/command
15#define OLED_RESET 8   // Reset
16
17#define DHT11PIN 4
18
19// Create an SSD1306 SPI instance
20Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &SPI, OLED_DC, OLED_RESET, OLED_CS);
21
22dht11 DHT11;
23
24void setup() {
25  Serial.begin(9600);
26  Serial.println("Initializing OLED...");
27
28  // Initialize the display
29  if (!display.begin(SSD1306_SWITCHCAPVCC)) {
30    Serial.println(F("SSD1306 initialization failed!"));
31    for (;;); // Infinite loop on failure
32  }
33
34  Serial.println("OLED initialized successfully!");
35
36  // Clear the display
37  display.clearDisplay()
38}
39
40void loop() {
41
42  int chk = DHT11.read(DHT11PIN); //Read the DHT 11
43  
44
45
46  display.clearDisplay();
47
48  
49  display.setTextSize(2);             // Size 2
50  display.setTextColor(SSD1306_WHITE); // White text
51  display.setCursor(0, 0);            // Start at top-left corner
52  display.println("Temp:");
53  display.println((float)DHT11.temperature, 2); //Display the Temperature
54  display.println("Humidity:");
55  display.println((float)DHT11.humidity, 2); //Display the Humidity
56  display.setCursor(60,16);
57  display.print("C");
58  display.setCursor(60,48);
59  display.print("%");
60  display.display();  
61  delay(200);
62}