Arduino uno User Manual

Serial.print("Connecting...");
50
-
if (client.connect(_smtp_server, _port) <= 0) {
-
Serial.println("connection failed.");
-
} else {
-
Serial.println("connected.");
55
read_response(client);
-
if (!_use_auth) {
-
Serial.println("Using no authentication.");
-
send_line(client, "helo");
-
}
60
else {
-
Serial.println("Using authentication.");
-
send_line(client, "ehlo");
-
send_line(client, "auth login");
-
send_line(client, _username);
65
send_line(client, _password);
-
}
-
send_line(
-
client,
-
"mail from: <" + email.getFrom() + ">"
70
);
-
send_line(
-
client,
-
"rcpt to: <" + email.getTo() + ">"
-
);
75
send_line(client, "data");
-
send_line(client, "from: " + email.getFrom());
-
send_line(client, "to: " + email.getTo());
-
send_line(client, "subject: " + email.getSubject());
-
send_line(client, "");
80
send_line(client, email.getBody());
-
send_line(client, ".");
-
send_line(client, "quit");
-
client.println("Disconnecting.");
-
client.stop();
85
}
-
}
-
};
-
-
#endif
90
Admittedly, this is a lot of code, but we’ll walk through it step by step. First,
the SmtpService class encapsulates the SMTP server’s IP address and its port.
These attributes are required in any case. In addition, we store a username
and a password in case someone’s going to use an authenticated connection.
To communicate with an SMTP server, we have to read its responses, and we
do that using the private read_response method starting on line 13. It waits for
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Arduino uno Specifications

General

Form factor	Arduino
Certification	RoHS, FC, CE
Processor model	-
Processor frequency	- MHz
Microcontroller model	ATmega328
Microcontroller frequency	16 MHz
DC input voltage	7-12 V
Operating voltage	5 V
DC current per I/O pin	40 mA
Flash memory	0.032 MB
Maximum internal memory	- GB
SRAM (Static Random Access Memory)	2 KB
EEPROM (Electrically Erasable Programmable Read-Only Memory)	1 KB
Wi-Fi	No
Number of analog I/O pins	6
Number of digital I/O pins	14

Weight and Dimensions

Board dimensions	53.4 x 68.6 mm