Published June 4, 2019 © CC BY-NC-SA

DIY ESP DASH BUTTON | Open-Source WiFi Button with IFTTT

In this project we will build an ESP Wi-Fi Button that can trigger any home automation event.

IntermediateFull instructions provided3,024

DIY ESP DASH BUTTON | Open-Source WiFi Button with IFTTT

Things used in this project

Hardware components

Resistor 12K

Resistor 470R

Resistor 1K

Resistor 330R

Resistor 10K

Resistor 1.2K

Capacitors Tantalum

Capacitors 100nF

Capacitors 10uF

Diode SS14

LED Red

LED Green

LED RGB

Transistor S8050

CP210X

TP4056

ESP-12E

NCP1117ST33T3G

Connector

MUSTOOL G700 HD 1080P Microscope

YIHUA 995D Soldering Station

3.7V 1100mAH LiPo

HoldPeak SMD Tester

USB Connector Kit

Excellway Terminals Kit

Slide Switch

Tactile Push Button

Solder Paste Cream

Story

This is like a remote control that you can take in your pocket or place anywhere that when pressed sends out an email. The Wi-Fi button is not a new idea. Dash button is a small button that instantly orders a product to your home. Since the ESP boards are so inexpensive, we can make a similar project that works like the Dash button.

Instead of ordering a product we can turn on a light, share a post on Instagram, Twitter and Facebook, trigger an email notification and much more, as you’re going to see by the end of this project.

DIY ESP WiFi Dash Button Video Tutorial

See how it works! You can see all the steps of this project in this video.

Video Link - https://youtu.be/v9rtv5yPHh4

Download Gerber File & Order PCB

We have built "Arduino Project Board" before. You remember we have ordered our PCB from PCBWay. In this project, we have choosen PCBWay. They become the sponsor of his project. PCBWay is the only way to make this project happen a very low cost and high quality. We also used SMD components. So we ordered double-side stencil.

$0 For New members first order & Low Price for PCB Stencil at https://www.pcbway.com/

PCBWay Celebrating 5th Anniversary | FREE gifts are waiting for you - http://bit.ly/2Z5knPj

I CAN SOLDER KIT Win Up To $800 + in prizes - http://bit.ly/2Z5knPj

ESP Dash Button PCB Files - http://bit.ly/2ELyf9O

IFTTT - If This Than That

For this project we’re going to use a free service called IFTTT that stands for If This Than That. This service is used to automate a wide variety of tasks online. In this case, we will send an email, facebook and twitter post when the ESP pushbutton is pressed.

Type in your browser https://ifttt.comand click the “Get started” button in the middle of the page. Complete the form with your details and create your account.

In the wesite, Open the “My Applets” tab, press the create “New Applet” button.

Click the “This” word and search for the “Webhooks” service.

You need to type in the event name button_pressed. With the Webhooks service you can trigger an action when you make an HTTP request to a specific URL.

Now press the “That” word and search for the Gmail service or any other services like facebook, twitter and instagram.

If it’s the first time using the Gmail service with IFTTT, a new window opens and you’ll have to grant access, so IFTTT can send out emails through your account.

Choose the “Send email” option and enter the email address in the “To address” field where you want to receive your notification.

You can customize the subject and body of the email. Finally press the “Create action” button.

You should have your Applet created after clicking “Finish”

Open the “Search” tab, find the Webhooks service and open it. Go to the “Documentation” tab.

Here you can find your API KEY that you must keep private. Type in the event name, button_pressed. Your final URL should appear in the bottom of the web page. Copy that URL.

Save your unique URL, because you’ll need it later in this project.

Code

DIY ESP DASH BUTTON

#include <ESP8266WiFi.h>
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>

int wakePin = 4;

// Set web server port number to 80
WiFiServer server1(80);

// Variable to store the HTTP request
String header;

// Replace with your unique IFTTT URL resource
const char* resource = "/trigger/YOUR_EVENT_NAME/with/key/YOUR_API_KEY";

// Maker Webhooks IFTTT
const char* server = "maker.ifttt.com";

void setup() {
  Serial.begin(115200);
  pinMode(wakePin, INPUT);
  // WiFiManager
  // Local intialization. Once its business is done, there is no need to keep it around
  WiFiManager wifiManager;

  // fetches ssid and pass from eeprom and tries to connect
  // if it does not connect it starts an access point with the specified name
  // here  "AutoConnectAP"
  // and goes into a blocking loop awaiting configuration
  wifiManager.autoConnect();
  // or use this for auto generated name ESP + ChipID
  //wifiManager.autoConnect();

  // if you get here you have connected to the WiFi
  Serial.println("Connected.");
  
  server1.begin();
  initWifi();
  wakeStatus();
  //makeIFTTTRequest();
  
  // Deep sleep mode until RESET pin is connected to a LOW signal (pushbutton is pressed)
  //ESP.deepSleep(0);
}

void loop() {
  // sleeping so wont get here
}

// Establish a Wi-Fi connection with your router
void initWifi() {
  WiFiClient client = server1.available();   // Listen for incoming clients

  if (client) {                             // If a new client connects,
    Serial.println("New Client.");          // print a message out in the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected()) {            // loop while the client's connected
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        header += c;
        if (c == '\n') {                    // if the byte is a newline character
          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println("Connection: close");
            client.println();

            // Web Page Heading
            client.println("<body><h1>ESP8266 Web Server</h1>");
            // The HTTP response ends with another blank line
            client.println();
            // Break out of the while loop
            break;
          } else { // if you got a newline, then clear currentLine
            currentLine = "";
          }
        } else if (c != '\r') {  // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }
      }
    }
    // Clear the header variable
    header = "";
    // Close the connection
    client.stop();
    Serial.println("Client disconnected.");
    Serial.println("");
  }
}

void wakeStatus(){
  if(wakePin = HIGH){
    makeIFTTTRequest();
    Serial.println("Wake Pin Pressed");
  }
  else{
    ESP.deepSleep(0);
    Serial.println("Go to Sleep");
  }
}

// Make an HTTP request to the IFTTT web service
void makeIFTTTRequest() {
  Serial.print("Connecting to "); 
  Serial.print(server);
  
  WiFiClient client;
  int retries = 5;
  while(!!!client.connect(server, 80) && (retries-- > 0)) {
    Serial.print(".");
  }
  Serial.println();
  if(!!!client.connected()) {
     Serial.println("Failed to connect, going back to sleep");
  }
  
  Serial.print("Request resource: "); 
  Serial.println(resource);
  client.print(String("GET ") + resource + 
                  " HTTP/1.1\r\n" +
                  "Host: " + server + "\r\n" + 
                  "Connection: close\r\n\r\n");
                  
  int timeout = 5 * 10; // 5 seconds             
  while(!!!client.available() && (timeout-- > 0)){
    delay(100);
  }
  if(!!!client.available()) {
     Serial.println("No response, going back to sleep");
  }
  while(client.available()){
    Serial.write(client.read());
  }
  
  Serial.println("\nclosing connection");
  client.stop();
}

Credits

Maker 101

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