// Crated by Nguyen Sum,
// https://nguyensumiot.wordpress.com/
// http://nguyensum.simplesite.com/
#include
#include
//DHT config
#define DHTPIN 4 // what digital pin we're connected to
//#define DHTTYPE DHT11 // DHT 11
#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
DHT dht(DHTPIN, DHTTYPE);
// Wi-Fi Settings
const char* ssid = "YOUR-WIFI-SSID"; // your wireless network name (SSID)
const char* password = "YOUR-WIFI-PASS"; // your Wi-Fi network password
WiFiClient client;
// ThingSpeak Settings
const int channelID = YOUR-CHANNEL-ID; //
String writeAPIKey = "YOUR-API-KEY"; // write API key for your ThingSpeak Channel
const char* server = "api.thingspeak.com";
const int postingInterval = 2 * 1000; // post data every 2 seconds
void setup() {
Serial.begin(115200);
dht.begin();
Serial.print("Connecting");
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(100);
}
Serial.println("\r\nWiFi connected");
}
void loop() {
// wait and then post again
delay(postingInterval);
float temp = dht.readTemperature();
float humi = dht.readHumidity();
if (isnan(temp) || isnan(humi)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
if (client.connect(server, 80)) {
// Construct API request body
String body = "field1=" + String(temp, 1) + "&field2=" + String(humi, 1);
client.print("POST /update HTTP/1.1\n");
client.print("Host: api.thingspeak.com\n");
client.print("Connection: close\n");
client.print("X-THINGSPEAKAPIKEY: " + writeAPIKey + "\n");
client.print("Content-Type: application/x-www-form-urlencoded\n");
client.print("Content-Length: ");
client.print(body.length());
client.print("\n\n");
client.print(body);
client.print("\n\n");
Serial.printf("Nhiet do %s - Do am %s\r\n", String(temp, 1).c_str(), String(humi, 1).c_str());
}
client.stop();
}
Link tham khảo
http://nguyensum.simplesite.com/431208435
