Wednesday 27 April 2016

NodeMCU + PIR sensor HC-SR501 + ThingSpeak = Motion Detection alert Via Twitter





To get API keys register at https://thingspeak.com/  and then on its twitter app on https://thingspeak.com/apps/thingtweet

Code

//nodeMCU v1.0 (black) with Arduino IDE
//nodemcu pinout https://github.com/esp8266/Arduino/issues/584

#include <ESP8266WiFi.h>
#include <pins_arduino.h>
#define myPeriodic 15 //in sec | Thingspeak pub is 15sec

long min=0;
int PIRpin = 14;
int PIRvalue=0;
const char* server = "api.thingspeak.com";
String apiKey ="Your-api-key";
String api_key_ts="your-api-key-ts";
const char* MY_SSID = "wifi=ssid"; 
const char* MY_PWD = "password";

int failedCounter = 0;
long lastConnectionTime = 0; 
boolean lastConnected = false;
int sent = 0;

void setup() {
  pinMode(PIRpin, INPUT);
  Serial.begin(115200);
  connectWifi();
}

void loop() {
  PIRvalue=digitalRead(PIRpin);
if (PIRvalue==HIGH){
  Serial.println(String(sent)+"Motion detected ");
  sendMotion(PIRvalue);
  updateTwitterStatus("My thing is social @thingspeak, Motion detected, possible intruder!");
  int count = myPeriodic;
  while(count--)
  delay(1000);}
  else{
    Serial.println(String(sent)+"Motion NOT detected ");
  sendMotion(PIRvalue);
  int count = myPeriodic;
  while(count--)
  delay(1000);}
    
}

void connectWifi()
{
  Serial.print("Connecting to "+*MY_SSID);
  WiFi.begin(MY_SSID, MY_PWD);
  while (WiFi.status() != WL_CONNECTED) {
  delay(1000);
  Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("Connected");
  Serial.println("");  
}//end connect

void sendMotion(int PIRv)
{  
   WiFiClient client;
  
   if (client.connect(server, 80)) { // use ip 184.106.153.149 or api.thingspeak.com
   Serial.println("WiFi Client connected ");
   String postStr = apiKey;
   postStr += "&field1=";
   postStr += String(PIRv);
   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);
   delay(1000);
   
   }//end if
   sent++;
 client.stop();
}//end send
void updateTwitterStatus(String tsData)
{
  
  WiFiClient client;
  if (client.connect(server, 80))
  { Serial.println("WiFi Client connected to thingSpeak ");
    // Create HTTP POST Data
    
    min =millis()/(1000);
    tsData = min+tsData;
    tsData = "api_key="+api_key_ts+"&status="+tsData;
            
    client.print("POST /apps/thingtweet/1/statuses/update HTTP/1.1\n");
    client.print("Host: api.thingspeak.com\n");
    client.print("Connection: close\n");
    client.print("Content-Type: application/x-www-form-urlencoded\n");
    client.print("Content-Length: ");
    client.print(tsData.length());
    client.print("\n\n");

    client.print(tsData);
    
    if (client.connected())
    {
      Serial.println("Connecting to ThingSpeak/thingtweet...");
      Serial.println();
      
    }
}
}

2 comments:

  1. This comment has been removed by the author.

    ReplyDelete
  2. there are three fields for api keys which keys have to be used where ?

    ReplyDelete