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Envoi d’un email par la carte Arduino

But de ce tutoriel:

Dans ce tutoriel on va envoyer un email avec la carte Arduino lorsqu’on appuie sur un bouton poussoir.

Tout d’abord, on doit utiliser un serveur SMTP qui permet d’envoyer un email par la carte Arduino.

Ensuite, on doit avoir la carte wifi ESP8266 qui permet de connecter la carte Arduino à l’Internet par wifi.

Composants nécessaire:

  • Carte Arduino
  • Carte ESP8266
  • Module d’alimentation
  • Bouton poussoir

Montage

Pour réaliser le montage, on peut connecter

  • La broche RX de la carte ESP8266 à la broche 4 de la carte Arduino
  • La broche TX de la carte ESP8266 à la broche 3 de la carte Arduino
  • La broche GND de la carte ESP8266 au GND de la carte Arduino
  • Les deux broches 3V3 et EN de la carte ESP8266 à la broche 5V du module de l’alimentation
  • La broche RST de la carte ESP8266 à la broche 8 de la carte Arduino
  • la première patte du bouton poussoir à la broche A0 de la carte Arduino
  • la deuxième patte du bouton poussoir à GND de la carte Arduino

Programme:

#include <Adafruit_ESP8266.h>
/* 
--------------------------------------------------------------------------------------------------------------------------
-- @description A sketch for sending email via SMTP. Working Example: https://www.youtube.com/watch?v=n5WZ_BNRvRY 
-- You must use an account which can provide unencrypted authenticated access.
-- This example was tested with an AOL and Time Warner email accounts. GMail does not offer unecrypted authenticated access.
-- To obtain your email's SMTP server and port simply Google it e.g. [my email domain] SMTP settings
-- For example for timewarner you'll get to this page http://www.timewarnercable.com/en/support/faqs/faqs-internet/e-mailacco/incoming-outgoing-server-addresses.html
-- To Learn more about SMTP email visit:
-- SMTP Commands Reference - http://www.samlogic.net/articles/smtp-commands-reference.htm
-- See "SMTP transport example" in this page http://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol
-----------------------------------------------------------------------------------------------------------------------------
*/

/*------------------------------------------------------------------------
Requires SoftwareSerial and an ESP8266 that's been
flashed with recent 'AT' firmware operating at 9600 baud. Only tested
w/Adafruit-programmed modules: https://www.adafruit.com/product/2282
The ESP8266 is a 3.3V device. Safe operation with 5V devices (most
Arduino boards) requires a logic-level shifter for TX and RX signals.
------------------------------------------------------------------------*/

#include <SoftwareSerial.h>

#define ESP_RX 3
#define ESP_TX 4
#define ESP_RST 8
SoftwareSerial softser(ESP_RX, ESP_TX);

// Must declare output stream before Adafruit_ESP8266 constructor; can be
// a SoftwareSerial stream, or Serial/Serial1/etc. for UART.
Adafruit_ESP8266 wifi(&softser, &Serial, ESP_RST);
// Must call begin() on the stream(s) before using Adafruit_ESP8266 object.

#define ESP_SSID "************" // Your network name here
#define ESP_PASS "************" // Your network password here

char EMAIL_FROM[] = "adresse email émetteur";
char EMAIL_PASSWORD[] = "mot de passe";
char EMAIL_TO[] = "adresse email récepteur";
char SUBJECT[] = "My ESP8266";
char EMAIL_CONTENT[] = "Hello,\r\nThis is a message from your ESP8266.";

// We'll need your EMAIL_FROM and its EMAIL_PASSWORD base64 encoded, you can use https://www.base64encode.org/
#define EMAIL_FROM_BASE64 "********************"
#define EMAIL_PASSWORD_BASE64 "*****************"

#define HOST "nom d'un serveur smtp" // Find/Google your email provider's SMTP outgoing server name for unencrypted email

#define PORT 587 // Find/Google your email provider's SMTP outgoing port for unencrypted email

int count = 0; // we'll use this int to keep track of which command we need to send next
bool send_flag = false; // we'll use this flag to know when to send the email commands
const int btnPin = A0; // le bouton est connecté à la broche A0 de la carte Adruino
int btnVal = 0;

void setup() {
pinMode(btnPin,INPUT_PULLUP);
char buffer[50];

// This might work with other firmware versions (no guarantees)
// by providing a string to ID the tail end of the boot message:

// comment/replace this if you are using something other than v 0.9.2.4!
wifi.setBootMarker(F("Version:0.9.2.4]\r\n\r\nready"));

softser.begin(9600); // Soft serial connection to ESP8266
Serial.begin(57600); while(!Serial); // UART serial debug

Serial.println(F("Adafruit ESP8266 Email"));

// Test if module is ready
Serial.print(F("Hard reset..."));
if(!wifi.hardReset()) {
Serial.println(F("no response from module."));
for(;;);
}
Serial.println(F("OK."));

Serial.print(F("Soft reset..."));
if(!wifi.softReset()) {
Serial.println(F("no response from module."));
for(;;);
}
Serial.println(F("OK."));

Serial.print(F("Checking firmware version..."));
wifi.println(F("AT+GMR"));
if(wifi.readLine(buffer, sizeof(buffer))) {
Serial.println(buffer);
wifi.find(); // Discard the 'OK' that follows
} else {
Serial.println(F("error"));
}

Serial.print(F("Connecting to WiFi..."));
if(wifi.connectToAP(F(ESP_SSID), F(ESP_PASS))) {

// IP addr check isn't part of library yet, but
// we can manually request and place in a string.
Serial.print(F("OK\nChecking IP addr..."));
wifi.println(F("AT+CIFSR"));
if(wifi.readLine(buffer, sizeof(buffer))) {
Serial.println(buffer);
wifi.find(); // Discard the 'OK' that follows

Serial.print(F("Connecting to host..."));

Serial.print("Connected..");
wifi.println("AT+CIPMUX=0"); // configure for single connection, 
//we should only be connected to one SMTP server
wifi.find();
wifi.closeTCP(); // close any open TCP connections
wifi.find();
Serial.println("Type \"send it\" to send an email");

} else { // IP addr check failed
Serial.println(F("error"));
}
} else { // WiFi connection failed
Serial.println(F("FAIL"));
}
}

void loop() {

if(!send_flag){ // check if we expect to send an email

btnVal=analogRead(btnPin); 
if(btnVal<200) // On appuie sur le bouton poussoir
{
send_flag = true; // envoyer l'email
//Serial.println(btnVal);
delay(1000);
} 
}

if(send_flag){ // the send_flat is set, this means we are or need to start sending SMTP commands
if(do_next()){ // execute the next command
count++; // increment the count so that the next command will be executed next time.
}
}
}

// do_next executes the SMTP command in the order required.
boolean do_next()
{

switch(count){ 
case 0:
Serial.println("Connecting...");
return wifi.connectTCP(F(HOST), PORT);
break;
case 1:
// send "HELO ip_address" command. Server will reply with "250" and welcome message
return wifi.cipSend("HELO computer.com",F("250")); // ideally an ipaddress should go in place 
// of "computer.com" but I think the email providers
// check the IP anyways so I just put anything. 
break;
case 2:
// send "AUTH LOGIN" command to the server will reply with "334 username" base 64 encoded
return wifi.cipSend("AUTH LOGIN",F("334 VXNlcm5hbWU6"));
break;
case 3:
// send username/email base 64 encoded, the server will reply with "334 password" base 64 encoded
return wifi.cipSend(EMAIL_FROM_BASE64,F("334 UGFzc3dvcmQ6")); 
break;
case 4:
// send password base 64 encoded, upon successful login the server will reply with 235.
return wifi.cipSend(EMAIL_PASSWORD_BASE64,F("235"));
break;
case 5:{
// send "MAIL FROM:<emali_from@domain.com>" command
char mailFrom[50] = "MAIL FROM:<"; // If 50 is not long enough change it, do the same for the array in the other cases
strcat(mailFrom,EMAIL_FROM);
strcat(mailFrom,">");

return wifi.cipSend(mailFrom,F("250"));
break;
}
case 6:{
// send "RCPT TO:<email_to@domain.com>" command
char rcptTo[50] = "RCPT TO:<";
strcat(rcptTo,EMAIL_TO);
strcat(rcptTo,">");
return wifi.cipSend(rcptTo,F("250")); 
break;
}
case 7:
// Send "DATA" command, the server will reply with something like "334 end message with \r\n.\r\n."
return wifi.cipSend("DATA",F("354"));
break;
case 8:{
// apply "FROM: from_name <from_email@domain.com>" header
char from[100] = "FROM: ";
strcat(from,EMAIL_FROM);
strcat(from," ");
strcat(from,"<");
strcat(from,EMAIL_FROM);
strcat(from,">");
return wifi.cipSend(from); 
break;
}
case 9:{
// apply TO header 
char to[100] = "TO: ";
strcat(to,EMAIL_TO);
strcat(to,"<");
strcat(to,EMAIL_TO);
strcat(to,">");
return wifi.cipSend(to); 
break;
}
case 10:{
// apply SUBJECT header
char subject[50] = "SUBJECT: ";
strcat(subject,SUBJECT);
return wifi.cipSend(subject);
break;
}
case 11:
return wifi.cipSend("\r\n"); // marks end of header (SUBJECT, FROM, TO, etc);
break;
case 12:
return wifi.cipSend(EMAIL_CONTENT);
break;
case 13:
return wifi.cipSend("\r\n."); // marks end of data command
break;
case 14:
return wifi.cipSend("QUIT");
break;
case 15:
wifi.closeTCP();
return true;
break;
case 16:
Serial.println("Done");
send_flag = false;
count = 0;
return false; // we don't want to increment the count
break;
default:
break;
}
}



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