ESP32 - Motion Sensor Email Notification
In this tutorial, we will learn how to use an ESP32 and a motion sensor to send email notifications when someone illegally enters your room. This comprehensive guide covers the setup process, required components, and step-by-step instructions for integrating an ESP32 with a motion sensor and an email service. Enhance your home security and stay informed with real-time alerts sent directly to your inbox using the ESP32.
Or you can buy the following sensor kits:
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We have specific tutorials about Motion Sensor and Gmail. Each tutorial contains detailed information and step-by-step instructions about hardware pinout, working principle, wiring connection to ESP32, ESP32 code... Learn more about them at the following links:
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If you're unfamiliar with how to supply power to the ESP32 and other components, you can find guidance in the following tutorial: How to Power ESP32.
#include <WiFi.h>
#include <ESP_Mail_Client.h>
#define WIFI_SSID "YOUR_WIFI_SSID"
#define WIFI_PASSWORD "YOUR_WIFI_PASSWORD"
#define SENDER_EMAIL "xxxxxx@gmail.com"
#define SENDER_PASSWORD "xxxx xxxx xxxx xxxx"
#define RECIPIENT_EMAIL "xxxxxx@gmail.com"
#define SMTP_HOST "smtp.gmail.com"
#define SMTP_PORT 587
#define MOTION_SENSOR_PIN 19
int motion_state;
int prev_motion_state;
SMTPSession smtp;
void setup() {
Serial.begin(9600);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
Serial.print("Connecting to Wi-Fi");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(300);
}
Serial.println();
Serial.print("Connected with IP: ");
Serial.println(WiFi.localIP());
Serial.println();
pinMode(MOTION_SENSOR_PIN, INPUT);
motion_state = digitalRead(MOTION_SENSOR_PIN);
}
void loop() {
prev_motion_state = motion_state;
motion_state = digitalRead(MOTION_SENSOR_PIN);
if (prev_motion_state == LOW && motion_state == HIGH) {
Serial.println("Motion detected! Someone is in your room!");
String subject = "Email Notification from ESP32";
String textMsg = "This is an email sent from ESP32.\n";
textMsg += "Motion detected! Someone is in your room!";
gmail_send(subject, textMsg);
}
}
void gmail_send(String subject, String textMsg) {
MailClient.networkReconnect(true);
smtp.debug(1);
smtp.callback(smtpCallback);
Session_Config config;
config.server.host_name = SMTP_HOST;
config.server.port = SMTP_PORT;
config.login.email = SENDER_EMAIL;
config.login.password = SENDER_PASSWORD;
config.login.user_domain = F("127.0.0.1");
config.time.ntp_server = F("pool.ntp.org,time.nist.gov");
config.time.gmt_offset = 3;
config.time.day_light_offset = 0;
SMTP_Message message;
message.sender.name = F("ESP32");
message.sender.email = SENDER_EMAIL;
message.subject = subject;
message.addRecipient(F("To Whom It May Concern"), RECIPIENT_EMAIL);
message.text.content = textMsg;
message.text.transfer_encoding = "base64";
message.text.charSet = F("utf-8");
message.priority = esp_mail_smtp_priority::esp_mail_smtp_priority_low;
message.addHeader(F("Message-ID: <abcde.fghij@gmail.com>"));
if (!smtp.connect(&config)) {
Serial.printf("Connection error, Status Code: %d, Error Code: %d, Reason: %s\n", smtp.statusCode(), smtp.errorCode(), smtp.errorReason().c_str());
return;
}
if (!smtp.isLoggedIn()) {
Serial.println("Not yet logged in.");
} else {
if (smtp.isAuthenticated())
Serial.println("Successfully logged in.");
else
Serial.println("Connected with no Auth.");
}
if (!MailClient.sendMail(&smtp, &message))
Serial.printf("Error, Status Code: %d, Error Code: %d, Reason: %s\n", smtp.statusCode(), smtp.errorCode(), smtp.errorReason().c_str());
}
void smtpCallback(SMTP_Status status) {
Serial.println(status.info());
if (status.success()) {
Serial.println("----------------");
Serial.printf("Email sent success: %d\n", status.completedCount());
Serial.printf("Email sent failed: %d\n", status.failedCount());
Serial.println("----------------\n");
for (size_t i = 0; i < smtp.sendingResult.size(); i++) {
SMTP_Result result = smtp.sendingResult.getItem(i);
Serial.printf("Message No: %d\n", i + 1);
Serial.printf("Status: %s\n", result.completed ? "success" : "failed");
Serial.printf("Date/Time: %s\n", MailClient.Time.getDateTimeString(result.timestamp, "%B %d, %Y %H:%M:%S").c_str());
Serial.printf("Recipient: %s\n", result.recipients.c_str());
Serial.printf("Subject: %s\n", result.subject.c_str());
}
Serial.println("----------------\n");
smtp.sendingResult.clear();
}
}
Connect the ESP32 board to the motion sensor
Connect the ESP32 board to your PC via a micro USB cable
Open Arduino IDE on your PC.
Select the right ESP32 board (e.g. ESP32 Dev Module) and COM port.
Open the Library Manager by clicking on the Library Manager icon on the left navigation bar of Arduino IDE.
Search ESP Mail Client, then find the ESP Mail Client created by Mobizt.
Click Install button to install ESP Mail Client library.
Copy the above code and open with Arduino IDE
Update the WiFi information (SSID and password) in the code by modifying the constants WIFI_SSID and WIFI_PASSWORD to match your own network credentials.
Update the sender email and password in the code by modifying the constants SENDER_EMAIL and SENDER_PASSWORD to your own email account details.
Update the recipient email in the code by modifying the constant RECIPIENT_EMAIL to your own email address. The recipient email can be the same as the sender email.
※ NOTE THAT:
Sender email MUST be Gmail
Sender password is the App passwords you got from previous step
Recipient email can be any type of email
Click Upload button on Arduino IDE to upload code to ESP32
Open the Serial Monitor
Make a movement in front of the motion sensor
Check out the result on Serial Monitor.
Motion detected! Someone is in your room!
#### Email sent successfully
> C: Email sent successfully
----------------
Message sent success: 1
Message sent failed: 0
----------------
Message No: 1
Status: success
Date/Time: May 27, 2024 04:42:50
Recipient: xxxxxx@gmail.com
Subject: Email Notification from ESP32
----------------
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