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@jctosta
Created March 7, 2017 22:34
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Wireless Doorbell with NodeMCU and IFTTT Maker Channel
#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
#define BUTTON 4
int buttonState = 0;
const char* ssid = "<wifi_ssid>";
const char* password = "<wifi_password>";
const char* host = "maker.ifttt.com";
const int httpsPort = 443;
// Use web browser to view and copy
// SHA1 fingerprint of the certificate
const char* fingerprint = "C0 5D 08 5E E1 3E E0 66 F3 79 27 1A CA 1F FC 09 24 11 61 62";
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
pinMode(BUTTON, INPUT_PULLUP);
delay(10);
// We start by connecting to a WiFi network
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");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
// put your main code here, to run repeatedly:
buttonState = digitalRead(BUTTON);
if (buttonState == LOW) {
Serial.println("pressed");
// Use WiFiClientSecure class to create TLS connection
WiFiClientSecure client;
Serial.print("connecting to ");
Serial.println(host);
if (!client.connect(host, httpsPort)) {
Serial.println("connection failed");
return;
}
if (client.verify(fingerprint, host)) {
Serial.println("certificate matches");
} else {
Serial.println("certificate doesn't match");
}
String url = "/trigger/{eventName}/with/key/{privateKey}";
Serial.print("requesting URL: ");
Serial.println(url);
client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"User-Agent: NodeMCU Doorbell\r\n" +
"Connection: close\r\n\r\n");
Serial.println("request sent");
while (client.connected()) {
String line = client.readStringUntil('\n');
if (line == "\r") {
Serial.println("headers received");
break;
}
}
String line = client.readStringUntil('\n');
Serial.println("reply was:");
Serial.println("==========");
Serial.println(line);
Serial.println("==========");
Serial.println("closing connection");
delay(300);
}
}
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