課程-ThingSpeak + 溫度溼度感測器
目的:
使用ESP-12測試版GPIO16 來讀取DHT11溫度溼度感測器的值，並每隔2秒中上傳至ThingSpeak
電子元件:
1)麵包板 x 1
2) ESP-12測試版主板 x 1
3) 5V , 3.3V 轉換板 x1
4) DHT11 溫度溼度感測器 x1
軟體:
1)Arduino IDE 1.6.5版本
2) DHT.zip
3) 留意 ESP8266 ESP-12 Tools Board --uploading 接線
程式 :
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//參考 http://www.arduinesp.com/thingspeak
#include <ESP8266WiFi.h>
#include <dht.h>
// replace with your channel's thingspeak API key,
String apiKey = "TW60RSJ9YFYLQRGK";
const char* ssid = "74170287";
const char* password = "24063173";
const char* server = "api.thingspeak.com";
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#define dht_dpin 16 //定義訊號要從進來
dht DHT;
WiFiClient client;
void setup() {
Serial.begin(115200);
delay(10);
pinMode(dht_dpin,INPUT);
WiFi.begin(ssid, password);
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
}
void loop() {
//++++++++++++++++++++++++++++++++++++++++++++++
DHT.read11(dht_dpin); //去library裡面找DHT.read11
float h = DHT.humidity;
float t = DHT.temperature;
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
if (client.connect(server,80)) { // "184.106.153.149" or api.thingspeak.com
String postStr = apiKey;
postStr +="&field1=";
postStr += String(t);
postStr +="&field2=";
postStr += String(h);
postStr += "\r\n\r\n";
client.print("POST /update HTTP/1.1\n");
client.print("Host: api.thingspeak.com\n");
client.print("Connection: close\n");
client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n");
client.print("Content-Type: application/x-www-form-urlencoded\n");
client.print("Content-Length: ");
client.print(postStr.length());
client.print("\n\n");
client.print(postStr);
Serial.print("Temperature: ");
Serial.print(t);
Serial.print(" degrees Celcius Humidity: ");
Serial.print(h);
Serial.println("% send to Thingspeak");
}
client.stop();
Serial.println("Waiting...");
// thingspeak needs minimum 15 sec delay between updates
delay(20000);
}
軟體:
1)Arduino IDE 1.6.5版本
2) DHT.zip
3) 留意 ESP8266 ESP-12 Tools Board --uploading 接線
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