Update

arduino/sketch_main/AnotherIFTTTWebhook.h

+// The MIT License
+// 
+// Copyright (c) 2015 Neil Webber
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+// ====================================================================
+// ====================================================================
+// An adapted version of IFTTT Trigger by Neil Webber
+// Original: https://gist.github.com/outofmbufs/d6ced37b49a484c495f0
+// 
+// Adaptation from: https://www.siytek.com
+//
+// How to use:
+// 1. Place AnotherIFTTTWebhook.h in the same directory as your project
+// 2. Add #include "AnotherIFTTTWebhook.h" to your main project file
+// 3. Send webhook using function in main file:
+//    send_webhook(EVENT, KEY, Value1, Value2, Value3);
+// ====================================================================
+// ====================================================================
+
+WiFiClient client;
+
+char *append_str(char *here, char *s) {
+    while (*here++ = *s++)
+  ;
+    return here-1;
+}
+
+char *append_ul(char *here, unsigned long u) {
+    char buf[20];       // we "just know" this is big enough
+
+    return append_str(here, ultoa(u, buf, 10));
+}
+
+void send_webhook(char *MakerIFTTT_Event, char *MakerIFTTT_Key, char *value1, char *value2, char *value3) {
+
+    // connect to the Maker event server
+    client.connect("maker.ifttt.com", 80);
+
+    // construct the POST request
+    char post_rqst[256];    // hand-calculated to be big enough
+
+    char *p = post_rqst;
+    p = append_str(p, "POST /trigger/");
+    p = append_str(p, MakerIFTTT_Event);
+    p = append_str(p, "/with/key/");
+    p = append_str(p, MakerIFTTT_Key);
+    p = append_str(p, " HTTP/1.1\r\n");
+    p = append_str(p, "Host: maker.ifttt.com\r\n");
+    p = append_str(p, "Content-Type: application/json\r\n");
+    p = append_str(p, "Content-Length: ");
+
+    // we need to remember where the content length will go, which is:
+    char *content_length_here = p;
+
+    // it's always two digits, so reserve space for them (the NN)
+    p = append_str(p, "NN\r\n");
+
+    // end of headers
+    p = append_str(p, "\r\n");
+
+    // construct the JSON; remember where we started so we will know len
+    char *json_start = p;
+
+    // As described - this example reports a pin, uptime, and "hello world"
+    p = append_str(p, "{\"value1\":\"");
+    p = append_str(p, value1);
+    p = append_str(p, "\",\"value2\":\"");
+    p = append_str(p, value2);
+    p = append_str(p, "\",\"value3\":\"");
+    p = append_str(p, value3);
+    p = append_str(p, "\"}");
+
+    // go back and fill in the JSON length
+    // we just know this is at most 2 digits (and need to fill in both)
+    int i = strlen(json_start);
+    content_length_here[0] = '0' + (i/10);
+    content_length_here[1] = '0' + (i%10);
+
+    // finally we are ready to send the POST to the server!
+    client.print(post_rqst);
+    client.stop();
+    
+}

arduino/sketch_main/NodeRedWebhook.h

+// The MIT License
+// 
+// Copyright (c) 2015 Neil Webber
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+// ====================================================================
+// ====================================================================
+// An adapted version of IFTTT Trigger by Neil Webber
+// Original: https://gist.github.com/outofmbufs/d6ced37b49a484c495f0
+// 
+// Adaptation from: https://www.siytek.com
+//
+// How to use:
+// 1. Place AnotherIFTTTWebhook.h in the same directory as your project
+// 2. Add #include "AnotherIFTTTWebhook.h" to your main project file
+// 3. Send webhook using function in main file:
+//    send_webhook(EVENT, KEY, Value1, Value2, Value3);
+// ====================================================================
+// ====================================================================
+
+WiFiClient client;
+
+char *append_str(char *here, char *s) {
+    while (*here++ = *s++)
+  ;
+    return here-1;
+}
+
+char *append_ul(char *here, unsigned long u) {
+    char buf[20];       // we "just know" this is big enough
+
+    return append_str(here, ultoa(u, buf, 10));
+}
+
+void send_webhook(char *url, char *endpoint, char *id) {
+
+    client.connect(url, 80);
+
+    // construct the POST request
+    char post_rqst[256];    // hand-calculated to be big enough
+
+    char *p = post_rqst;
+    p = append_str(p, "POST /api/");
+    p = append_str(p, endpoint);
+    p = append_str(p, " HTTP/1.1\r\n");
+    p = append_str(p, "Host: ");
+    p = append_str(p, url);
+    p = append_str(p, "\r\n");
+    p = append_str(p, "Content-Type: application/json\r\n");
+    p = append_str(p, "Content-Length: ");
+
+    // we need to remember where the content length will go, which is:
+    char *content_length_here = p;
+
+    // it's always two digits, so reserve space for them (the NN)
+    p = append_str(p, "NN\r\n");
+
+    // end of headers
+    p = append_str(p, "\r\n");
+
+    // construct the JSON; remember where we started so we will know len
+    char *json_start = p;
+
+    // As described - this example reports a pin, uptime, and "hello world"
+    p = append_str(p, "{\"id\":\"");
+    p = append_str(p, id);
+    p = append_str(p, "\"}");
+
+    // go back and fill in the JSON length
+    // we just know this is at most 2 digits (and need to fill in both)
+    int i = strlen(json_start);
+    content_length_here[0] = '0' + (i/10);
+    content_length_here[1] = '0' + (i%10);
+
+    Serial.println("Send event");
+    Serial.println(url);
+    Serial.println(post_rqst);
+
+    // finally we are ready to send the POST to the server!
+    client.print(post_rqst);
+    client.stop();
+    
+}

arduino/sketch_main/sketch_main.ino

 #include <SPI.h>
 #include <MFRC522.h>
 #include <WiFiNINA_Generic.h>
+#include "NodeRedWebhook.h"
 
 // ----- WIFI -------
 char ssid[] = "Lab@SmartLab_2G";
@@ -22,6 +23,14 @@ MFRC522::MIFARE_Key key;
 byte nuidPICC[4];
 unsigned long lastReadTS;
 
+// ------- IFTT -------
+char YOUR_IFTTT_API_KEY[] = "ba8Pa_lMmzkmMi5YC0PAiM";
+char YOUR_IFTTT_EVENT_NAME[] = "zoom";
+
+// -------- Node-Red ----
+char URL[] = "elwa.eu.ngrok.io";
+char ENDPOINT[] = "event";
+
 void connectToWifi() {
   // set the LED as output
   pinMode(LED_BUILTIN, OUTPUT);
@@ -34,7 +43,7 @@ void connectToWifi() {
     status = WiFi.begin(ssid, pass);
 
     // wait 10 seconds for connection:
-    delay(10000);
+    delay(3000);
   }
 
   // you're connected now, so print out the data:
@@ -123,10 +132,7 @@ void readRFID() {
     return;
   }
 
-  unsigned long test = millis() - lastReadTS;
-  Serial.println("Milis ");
-  Serial.println(test);
-
+ 
   if (rfid.uid.uidByte[0] != nuidPICC[0] || 
     rfid.uid.uidByte[1] != nuidPICC[1] || 
     rfid.uid.uidByte[2] != nuidPICC[2] || 
@@ -135,11 +141,15 @@ void readRFID() {
     ) {
     Serial.println(F("A new card has been detected."));
 
+   String hexstring;
+
     // Store NUID into nuidPICC array
     for (byte i = 0; i < 4; i++) {
       nuidPICC[i] = rfid.uid.uidByte[i];
+      hexstring += String(rfid.uid.uidByte[i], HEX);
     }
-   
+
+    Serial.println(hexstring);
     Serial.println(F("The NUID tag is:"));
     Serial.print(F("In hex: "));
     printHex(rfid.uid.uidByte, rfid.uid.size);
@@ -147,6 +157,10 @@ void readRFID() {
     Serial.print(F("In dec: "));
     printDec(rfid.uid.uidByte, rfid.uid.size);
     Serial.println();
+
+
+    char *hexchars = strdup(hexstring.c_str());
+    send_webhook(URL, ENDPOINT, hexchars);
   }
   else Serial.println(F("Card read previously."));
 
@@ -185,6 +199,8 @@ void printHex(byte *buffer, byte bufferSize) {
   }
 }
 
+
+
 /**
  * Helper routine to dump a byte array as dec values to Serial.
  */