EMailSender and SendGrid

[Jules]

To send an e-mail with EMAilSender, you can work with SendGrid. (https://sendgrid.com/en-us)
– create an account (free up to 100 mails per day).
install an application on the mobile phone for 2-level authentication
– create a SMTP Relay API key (full access)
copy the key and all your account information.

at the beginning of the code, don’t forget to enter :
—————————————————
#include <Arduino.h>
#include <SPI.h>
#include <Ethernet.h>
#include <EMailSender.h>
#define DEFAULT_EMAIL_NETWORK_TYPE_ARDUINO NETWORK_W5100 //If you’re using a schield W5100.
byte mac[6] = { 0x** 0x**, 0x**, 0x**, 0x**, 0x** }; // Your Adress Mac
IPAddress ip(192, 168, *, ***); // Your Address IP

EMailSender emailSend(“apikey”, “your_password_apikey”, “your_mail”, “smtp.sendgrid.net”, 587 );

// apikey signals that we’re going to send a code related to an api module
// your_password_apikey is the password given by Sendgrid when requesting an SMTP Relay key.
// your_mail is the Sendgrid login address.
// You must use 587 as port

void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(115200);
// while (!Serial) {}
delay(2000);

Serial.println(“Port série ok”);

// start the Ethernet connection:
pinMode(4, OUTPUT); // config for shield W5100 on MEGA2560
digitalWrite(4, HIGH); // config for shield W5100 on MEGA2560
if (Ethernet.begin(mac) == 0) {
Serial.println(“Failed to configure Ethernet using DHCP”);
while(1);
}
Serial.print(“Addresse IP “);
Serial.println(Ethernet.localIP());

EMailSender::EMailMessage message;
message.subject = “Test”;
message.message = “This indicates a reboot of the arduino”;
EMailSender::Response resp = emailSend.send(“address@****.***”, message);
Serial.print(“Status: “);
Serial.println(resp.desc);

void loop()
{
if(Serial.read() == ‘S’) {
if(sendEmail_1()); // to send the mail
}
}

byte sendEmail_1() {
EMailSender::EMailMessage message;
message.subject = “Your mail title”;
message.message = “Your information message”;
EMailSender::Response resp = emailSend.send(“address@****.***”, message);
Serial.print(“status: “);
Serial.println(resp.desc);
}
——————————————————————
Just incorporate this sketch into your own and have fun!

I had to search a lot of forums to find a simple way to send email alerts from my Arduino system. (I have information coming from my heater, a pump, etc …).
The EMailSender and SendGrid combination is the simplest.

[Renzo Mischianti]

Thanks Jules,
Your info will be precious for a lie of people.
Bye Renzo

[erjon]

Hey I tried your Code but could you tell me more detailed how did you set up the SendGrid because i think i have everything good exept that.

thanks

[Jules]

You need to create a SendGrid account and take the free option.
You will need a confirmation app on your mobile phone.
then create an api (relay).
Save your codes, they won’t be visible after they’ve been created.
that should do it.
see : https://sendgrid.com/en-us/blog/smtp-relay-service-basics

• This reply was modified 7 months, 2 weeks ago by Jules.

[erjon]

Hello,

Could we go on a Call about this. I dont quite understand the part of the confirmation app on the phone.

Bye

[Jules]

it’s a simple 2-level confirmation …
(mail + password) and mobile number
Sorry, but I don’t think we can call each other. I live in Belgium and I don’t understand enough English to hold a conversation. Writing is one thing, but conversation is another…

[erjon]

So Actually i did everything as told and my code is the same as yours i did 2FA on the sendgrid and i confirmed my mobile number too.
– I also did a Sender Authentication From where to where it needs to go // is this necessecary?
– I used the SMPT Relay where i made an api key and i used it for the apikey and apikey passowrd // is this correct?
– When i send a mail through arduino the Intnernet is working because i can see that it makes TCP connection to Sendgrid servers.
– Im sending from an Outlook Email to a Gmail Email and i dont know if that is right.

-do you need to pay sendgrid at anypoint because i want to use it for my self and send some email time to time ?

Hee i will put my Code (i want it to keep it very simple) maybe you can see any mistakes 🙂

#include <Ethernet.h>
//#define DEFAULT_EMAIL_NETWORK_TYPE_ARDUINO   NETWORK_W5100
#include <Arduino.h>
#include <SPI.h>
#include <EMailSender.h>
 
// Enter a MAC address for your controller below.
// Newer Ethernet shields have a MAC address printed on a sticker on the shield
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
 
EMailSender emailSend("apikey", "apikey-psw", "<my sendgrid email>", "smtp.sendgrid.net", 587);
 
void setup()
{
    // Open serial communications and wait for port to open:
    Serial.begin(9600);
//    while (!Serial) {}
 
    Serial.println("Starting!");
 
    // start the Ethernet connection:
    if (Ethernet.begin(mac) == 0) {
      Serial.println("Failed to configure Ethernet using DHCP");
      while(1);
    }
    Serial.print("IP address ");
    Serial.println(Ethernet.localIP());
 
 
    EMailSender::EMailMessage message;
    message.subject = "This is a Test";
    message.message = "Its a Test";
 
    EMailSender::Response resp = emailSend.send("the email i want the maessage to go", message);
 
    Serial.println("Sending status: ");
 
    Serial.println(resp.status);
    Serial.println(resp.code);
    Serial.println(resp.desc);
}
 
void loop()
{
    Serial.begin(9600);
    Serial.println("Starting!");
}

Thank you because im trying for a Week to get this working 🙂

• This reply was modified 7 months ago by erjon.

[Jules]

//#define DEFAULT_EMAIL_NETWORK_TYPE_ARDUINO NETWORK_W5100 <== deleting the // , the line must be made active

EMailSender emailSend(“apikey”, “apikey-psw”, “<my sendgrid email>”, “smtp.sendgrid.net”, 587);

// apikey remains apikey
// apikey-psw is the key given by SendGrid (64 characters)
// snedgridmail ==> do not put the < >

// ERROR : EMailSender::Response resp = emailSend.send(“the email i want the maessage to go”, message);
ok => EMailSender::Response resp = emailSend.send(“recipient@mail.***”, message);

make these changes and it should work
SendGrid is normally free for non-intensive personal use
since you didn’t put a destination address, it couldn’t go … “recipient@mail.***”

[Author]

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