#include <WiFi.h>
#include <HTTPClient.h>
#include <DHT.h>
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* Token = "gu67c1sbj01e4h4r6v9w";
const char* server = "http://thingsboard.cloud/api/v1/gu67c1sbj01e4h4r6v9w/telemetry";
#define DHTPIN 15
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
void setup() {
Serial.begin(115200);
delay(10);
Serial.println();
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
Serial.print("Connecting to WiFi..");
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
if (WiFi.status() == WL_CONNECTED) {
HTTPClient http;
float temperature = dht.readTemperature();
float humidity = dht.readHumidity();
if (isnan(temperature) || isnan(humidity)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
Serial.print("Temperature (raw): ");
Serial.print(temperature);
Serial.print(" °C, Humidity (raw): ");
Serial.print(humidity);
Serial.println(" %");
String url = server;
String payload = "{\"temperature\": " + String(temperature, 2) + ", \"humidity\": " + String(humidity, 2) + "}";
Serial.print("Sending data to: ");
Serial.println(url);
Serial.print("Payload: ");
Serial.println(payload);
http.begin(url);
http.addHeader("Content-Type", "application/json");
int httpResponseCode = http.POST(payload);
if (httpResponseCode > 0) {
String response = http.getString();
Serial.println(httpResponseCode);
Serial.println(response);
} else {
Serial.print("Error on sending POST: ");
Serial.println(httpResponseCode);
}
http.end();
} else {
Serial.println("WiFi not connected");
}
delay(1000);
}