97 lines
2.4 KiB
C++
Executable File
97 lines
2.4 KiB
C++
Executable File
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/* DHT22 temperature and humidity data are uploaded to thingspeak using
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* WeMOS ESP8266 MCU.
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*
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* Details: http://embedded-lab.com/blog/iot-temperature-and-humidity-logger/
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*/
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#include <ESP8266WiFi.h>
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#include <DHT.h>
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//#include "Math.h"
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#define DHTTYPE DHT22
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#define DHTPIN 0 // DHT22 data pin connects to D4
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// Time to sleep (in seconds):
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const int sleepTimeS = 60;
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DHT dht(DHTPIN, DHTTYPE, 11); // 11 works fine for ESP8266
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float prevTemp = 0;
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const char* server = "api.thingspeak.com";
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String apiKey ="API Key here";
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const char* MY_SSID = "Livebox-37cc";
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const char* MY_PWD = "8A6060920A8A86896F770F2C47";
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int sent = 0;
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void setup() {
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Serial.begin(115200);
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dht.begin();
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connectWifi();
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}
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void loop() {
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float t1,humidity;
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//char buffer[10];
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humidity = dht.readHumidity(); // Read humidity (percent)
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t1 = dht.readTemperature(true); // Read temperature as Fahrenheit
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// Check if any reads failed and exit early (to try again).
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if (isnan(humidity) || isnan(t1)) {
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Serial.println("Failed to read from DHT sensor!");
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return;
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}
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Serial.print(String(sent)+" Temperature: ");
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Serial.println(t1);
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Serial.print(String(sent)+" Humidity: ");
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Serial.println(humidity);
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sendTeperatureTS(t1, humidity);
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ESP.deepSleep(sleepTimeS*1000000, WAKE_RF_DEFAULT); // Sleep for 60 seconds
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}
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void connectWifi()
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{
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Serial.print("Connecting to "+*MY_SSID);
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WiFi.begin(MY_SSID, MY_PWD);
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while (WiFi.status() != WL_CONNECTED) {
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delay(1000);
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Serial.print(".");
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}
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Serial.println("");
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Serial.println("Connected");
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Serial.println("");
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}//end connect
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void sendTeperatureTS(float temp1, float temp2)
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{
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WiFiClient client;
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if (client.connect(server, 80)) { // use ip 184.106.153.149 or api.thingspeak.com
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Serial.println("WiFi Client connected ");
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String postStr = apiKey;
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postStr += "&field1=";
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postStr += String(temp1);
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postStr += "&field2=";
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postStr += String(temp2);
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postStr += "\r\n\r\n";
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client.print("POST /update HTTP/1.1\n");
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client.print("Host: api.thingspeak.com\n");
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client.print("Connection: close\n");
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client.print("X-THINGSPEAKAPIKEY: " + apiKey + "\n");
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client.print("Content-Type: application/x-www-form-urlencoded\n");
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client.print("Content-Length: ");
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client.print(postStr.length());
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client.print("\n\n");
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client.print(postStr);
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delay(1000);
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}//end if
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sent++;
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client.stop();
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}//end send
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