Smart Weather Monitor with OLED Screen

1#include <WiFi.h>
2#include <HTTPClient.h>
3#include <Adafruit_GFX.h>
4#include <Adafruit_SSD1306.h>
5#include <ArduinoJson.h>
6
7// WiFi credentials
8const char* ssid = //yourssid;
9const char* password = //yourpsd;
10
11// OpenWeatherMap API
12const char* apiKey = //yourapikey;
13const char* location = //your location;
14const char* apiUrl = //your url;
15
16// OLED display setup
17#define SCREEN_WIDTH 128
18#define SCREEN_HEIGHT 64
19#define OLED_RESET -1
20Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
21
22// Button setup
23const int buttonPin = 0; // GPIO for the button
24int buttonState = 0;
25int lastButtonState = 0;
26int displayMode = 0; // 0: Temperature, 1: Humidity, 2: Wind Speed
27
28// Weather data variables
29float temperature = 0.0;
30int humidity = 0;
31float windSpeed = 0.0;
32
33void setup() {
34  // Initialize serial
35  Serial.begin(115200);
36
37  // Initialize button pin
38  pinMode(buttonPin, INPUT_PULLUP);
39
40  // Initialize OLED display
41  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
42    Serial.println("SSD1306 allocation failed");
43    while (1);
44  }
45  display.clearDisplay();
46  display.display();
47
48  // Connect to WiFi
49  connectToWiFi();
50
51  // Fetch initial weather data
52  fetchWeatherData();
53}
54
55void loop() {
56  // Read button state
57  buttonState = digitalRead(buttonPin);
58
59  // Check if the button was pressed
60  if (buttonState == LOW && lastButtonState == HIGH) {
61    displayMode = (displayMode + 1) % 3; // Cycle through modes
62    displayWeatherData();
63  }
64  lastButtonState = buttonState;
65
66  // Fetch weather data every 10 minutes (600000 ms)
67  static unsigned long lastUpdate = 0;
68  if (millis() - lastUpdate > 600000) {
69    fetchWeatherData();
70    lastUpdate = millis();
71    displayWeatherData();
72  }
73}
74
75void connectToWiFi() {
76  Serial.print("Connecting to WiFi");
77  WiFi.begin(ssid, password);
78
79  while (WiFi.status() != WL_CONNECTED) {
80    delay(1000);
81    Serial.print(".");
82  }
83  Serial.println(" Connected!");
84}
85
86void fetchWeatherData() {
87  if (WiFi.status() == WL_CONNECTED) {
88    HTTPClient http;
89    http.begin(apiUrl);
90
91    int httpCode = http.GET();
92    if (httpCode > 0) {
93      String payload = http.getString();
94      Serial.println(payload); // Debugging: Print raw JSON response
95
96      StaticJsonDocument<1024> doc;
97      DeserializationError error = deserializeJson(doc, payload);
98
99      if (!error) {
100        temperature = doc["main"]["temp"].as<float>();
101        humidity = doc["main"]["humidity"].as<int>();
102        windSpeed = doc["wind"]["speed"].as<float>();
103      } else {
104        Serial.print("JSON parsing failed: ");
105        Serial.println(error.c_str());
106      }
107    } else {
108      Serial.print("HTTP GET failed: ");
109      Serial.println(http.errorToString(httpCode));
110    }
111    http.end();
112  } else {
113    Serial.println("WiFi not connected");
114  }
115}
116
117void displayWeatherData() {
118  display.clearDisplay();
119
120  switch (displayMode) {
121    case 0:
122      display.setTextSize(1);
123      display.setTextColor(WHITE);
124      display.setCursor(0, 0);
125      display.println("Weather in Karachi");
126      display.setTextSize(2);
127      display.setCursor(0, 20);
128      display.print("Temp: ");
129      display.print(temperature);
130      display.println(" C");
131      break;
132
133    case 1:
134      display.setTextSize(1);
135      display.setTextColor(WHITE);
136      display.setCursor(0, 0);
137      display.println("Weather in Karachi");
138      display.setTextSize(2);
139      display.setCursor(0, 20);
140      display.print("Hum: ");
141      display.print(humidity);
142      display.println(" %");
143      break;
144
145    case 2:
146      display.setTextSize(1);
147      display.setTextColor(WHITE);
148      display.setCursor(0, 0);
149      display.println("Weather in Karachi");
150      display.setTextSize(2);
151      display.setCursor(0, 20);
152      display.print("Wind: ");
153      display.print(windSpeed);
154      display.println(" m/s");
155      break;
156  }
157
158  display.display();
159}