WeMOS: WiFi Thingspeak analogRead

// analogRead > Thingspeak.com
//

#include <ESP8266WiFi.h>
 
// replace with your channel's thingspeak API key, 
String apiKey = "0C2X0PGNFHOEGYZA";
const char* ssid = "HUAWEI-1A73";
const char* password = "52408495";
const char* server = "api.thingspeak.com";

WiFiClient client;
   
 
void setup() {                
  Serial.begin(115200);
  delay(10); 

  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() {

  if (client.connect(server,80)) {  //   "184.106.153.149" or api.thingspeak.com
    String postStr = apiKey;
           postStr +="&field13=";
           postStr += String(analogRead(A0));
           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("A0: ");
     Serial.print(analogRead(A0));
     Serial.println(" send to Thingspeak");    
  }
  client.stop();
   
  Serial.println("Waiting...");    
  // thingspeak needs minimum 15 sec delay between updates
  delay(30000);
}

Pranala Menarik

• WeMOS