Month: January 2015

Hello again. I received ad home the Ethernet shield and it’s time to study it a bit!
What I want to understand is how to send an email to my email address .

The connection to the Arduino UNO is simple , a picture can explain better!

(from instructables.com)

We can connect the RJ45 socket to our router and the plug line to usb port (see below).

(from instructables.com)

The most important things to keep in mind are:

1. ethernet shield ip settings
2. ethernet shield mac address
3. SMTP settings to send email

My router is in DHCP so it dynamically set the IP address.
No problems for the MAC address: it can be set as you need.

There are two ways to send email with Ethernet Shield:

1. Temboo service has a library to send email with gmail account (instruction here )
2. SMTP2GO service to send up to 10 email with its SMTP free service (here you can register )

I choose SMTP2GO cause I discovered Temboo too late, when I finished to deploy with SMTP2GO.
If someone use Temboo let me know your opinion.

I used Nicolaj Joergensen code,it’s very clear and well explained.

#include <SPI.h>;
#include <Ethernet.h>;

// Arduino network information
byte mac[] = {  0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02 };
EthernetClient client;
char smtpServer[] = "smtpcorp.com";
void setup()
{
  Serial.begin(9600);  // for debug mode
  setupComm();
}
void loop()
{
  email("hallo");
  delay(1000);
}
//  ethernet shield connection init
void setupComm()
{
  Serial.println("Trying to connect");
  if (!Ethernet.begin(mac)){
    Serial.println("Failed to DHCP");
    // verifyng connection
    while(true);
  }
  delay(10000);
  // IP address is:
  Serial.print("IP address: ");
  for (byte thisByte = 0; thisByte < 4; thisByte++) {
    Serial.print(Ethernet.localIP()[thisByte], DEC);
    Serial.print(".");
  }
  Serial.println();
}
// now I send email
bool email(char* text)
{
  bool success = false;
  Serial.println("Sending email...");
  if (client.connect(smtpServer, 2525)){            //2525 is SMTP Server port
    Serial.println("connected");
    delay(100);
    client.println("EHLO arduino");
    for(int i=0; i<999; ++i){
      if(client.read() > 0)
        break;
    }
    Serial.println("responded");
    client.println("AUTH LOGIN");                     //see "http://base64-encoder-online.waraxe.us/"
    client.println("xxxxxxxxxx");           		 //Type your username  and encode it
    client.println("yyyyyyyyyy");        			//Type your password  and encode it</p>
    // Put your "from" email address here
    client.println("MAIL FROM:<dumm@gmail.com>"); //Seems you can write what you want here...
    for(int i=0; i<999; ++i){
      if(client.read() > 0)
        break;
    }
    client.println("RCPT TO:<mail@mail.com>");
    for(int i=0; i<999; ++i){
      if(client.read() > 0)
        break;
    }
    client.println("DATA");
    for(int i=0; i<999; ++i){
      if(client.read() > 0)
        break;
    }
    //Sender
    client.println("from: mail@mail.com"); //Sender address
    client.println("to: mail@mail.com");  //Receiver address
    client.println("SUBJECT: From your arduino");
    client.println("");
    client.println(text);
    client.println(".");
    client.println("QUIT");
    for (int i = 0; i<999; ++i){
      if(i > 998){
        Serial.println("error: No response");
      }
      if(client.read() > 0)
        break;
    }
    success = true;
    client.println();
    Serial.println("end");
  }
  else {
    Serial.println("Failed");
    client.println("QUIT"); //Disconnection
  }
  client.stop();
  return success;
}

Code explanation:

line  5: MAC Address setting: as told before you can choose the numerbs you want!
line  7:  SMTP server address (is smtpcorp.com for the SMTP2GO service)
line 15: email function: we send an email with “ciao” as text message.
line 22: ethernet shield initialization
line 30-33: here we display the IP address assigned in DHCP by my router. It’s really help know Ethernet shield address expecially if you want to use our shield as webserver.
line 42: SMTP command to send email.
line 51: 64 base encode for SMTP2GO username
line 52: 64 base encode for SMTP2GO password.

This link can be useful for encoding in 64 base: http://base64-encoder-online.waraxe.us/
For example CICCIO username will be Q0lDQ0lP in 64 base.

I uploaded the sketch on Arduino UNO and i received my first email!
At line 16 I set a delay, every 1 second Arduino will try to send an email!
Be careful cause SMTP2GO service provides up to 10 daily emails in the free edition.

It’s all for today with ethernet shield: i have all I want.

The next steps is to send a custom email when one sensor will detect an intrusion: I want to know witch sensor and at what time.

See you soon!

Ps. Meanwhile I received Arduino Nano!… 🙂 🙂

The noise sensor FC04 is really easy to use.
It only has 3 pins: Vcc, GND e SNG, therefore the connections I have established are the followings:

Pin Receiver	Pin Arduino
Vcc	5 V
GND	GND
SNG	Pin 2 (digital)

The sensor has a noise threshold set by a screw: if a noise  over the threshold is detected, a HIGH signal is sent to the selected pin (2 in our case).

Therefore the sketch can be:

 

int SERIAL_BAUD        = 9600;
int SENSOR_DIGITAL_PIN =    2;
int SOUND_DELAY        =   50; /* a small delay to not detect multiple noises or echos */
void setup() {
    Serial.begin(SERIAL_BAUD);
    pinMode(SERIAL_BAUD, INPUT);
}
void loop() {
    if (digitalRead(SENSOR_DIGITAL_PIN) == LOW) {
        Serial.print("Rumore!");
        delay(SOUND_DELAY);
    }
}

Now we can merge together the two programs (movement and noise sensor) to make Arduino send me an email in case of suspected intrusion.

I’ll work on internet shield in the next post: as always done i’ll try to understand how it works itself  and then add it with the noise sensor above and the movement sensor previously published .

A presto!