![\"ESP32](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/10\/Send-Email-ESP32-ESP8266-PHP-Script.png?resize=1200%2C675&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nUpdated on 27 March 2023<\/em><\/p>\n\n\n\n You can also set a threshold value, so your email notification is only sent if the temperature\/humidity\/pressure is above a certain value.<\/p>\n\n\n\n As an example, we’ll be using a BME280 sensor connected to an ESP32 or ESP8266 board. You can modify the code provided to send readings from a different sensor or even use multiple boards.<\/p>\n\n\n\n This is a great way to send email notifications using the ESP32 or ESP8266 without relying on IFTTT or an SMTP server.<\/p>\n\n\n\n In order to build this project, you will:<\/p>\n\n\n\n This project is also a great addition to build upon our previous projects:<\/p>\n\n\n\n The goal of this project is to have your own domain name and hosting account that allows you to send email notifications (without using an SMTP server, IFTTT, etc…). <\/p>\n\n\n\n Here’s a high-level overview of how the project works:<\/p>\n\n\n I recommend using one of the following hosting services that can handle all the project requirements:<\/p>\n\n\n\n Those two services are the ones that I use and personally recommend, but you can use any other hosting service. Any hosting service that offers PHP and MySQL will work with this tutorial. If you don’t have a hosting account, I recommend signing up for Bluehost<\/a>.<\/p>\n\n\n\n Get Hosting and Domain Name with Bluehost \u00bb<\/a><\/p>\n\n\n\n When buying a hosting account, you’ll also have to purchase a domain name. If you like our projects, you might consider signing up for one of the recommended hosting services, because you’ll be supporting our work.<\/p>\n\n\n\n Note: <\/strong> you can also run a LAMP (Linux, Apache, MySQL, PHP) server<\/a> on a Raspberry Pi, but it can’t send emails standalone. To send an email with a Raspberry Pi using PHP, you need to use an SMTP (Simple Mail Transfer Protocol) server.<\/p>\n\n\n\n After signing up for a hosting account and setting up a domain name<\/a>, you can login to your cPanel or similar dashboard.<\/p>\n\n\n\n After that, follow the next steps to create a PHP script that is responsible for receiving incoming requests from the ESP32\/ESP8266 and sending an email. <\/p>\n\n\n\n If you’re using a hosting provider with cPanel, go to Advanced and search for “File Manager<\/strong>“:<\/p>\n\n\n Then, select the public_html<\/strong> option and press the “+ File<\/strong>” button to create a new .php<\/em> file.<\/p>\n\n\n Note: <\/strong> if you’re following this tutorial and you’re not familiar with PHP, I recommend creating that exact file. Otherwise, you’ll need to modify the ESP sketch provided with a different URL path. <\/p>\n\n\n\n Create a new file in \/public_html<\/strong> with this exact name and extension: email-notification.php<\/em><\/p>\n\n\n Edit the newly created file (email-notification.php<\/em>) and copy the following script:<\/p>\n\n\n View raw code<\/a><\/p>\n\n\n\n Before saving the file, you need to modify the $email_address<\/span> variable with the receiver email address:<\/p>\n\n\n\n After adding the receiver email, save the file and continue with this tutorial. If you try to access your domain name in the next URL path, you’ll see the following:<\/p>\n\n\n\n If you see that message, it means that everything is being setup properly. You can continue with this project.<\/p>\n\n\n\n This project is compatible with both the ESP32 and ESP8266 boards. You just need to assemble a simple circuit and upload the sketch provided to publish temperature, humidity, and pressure readings to your PHP script, which will then be responsible to handle email notifications. The sketch is slightly different for each board.<\/p>\n\n\n\n For this example, we’ll get sensor readings from the BME280 sensor. Here’s a list of parts you need to build the circuit for this project:<\/p>\n\n\n\n You can use the preceding links or go directly to MakerAdvisor.com\/tools<\/a> to find all the parts for your projects at the best price!<\/p> The BME280 sensor module we\u2019re using communicates via I2C communication protocol, so you need to connect it to the ESP32 or ESP8266 I2C pins.<\/p>\n\n\n\n\n
\n
1. Hosting Your PHP Application<\/h2>\n\n\n\n
![\"Hosting](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/10\/ESP32-ESP8266-send-email-notification-with-sensor-readings-overview.png?resize=729%2C564&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\n
2. PHP Script HTTP – Send Email Notification<\/h2>\n\n\n\n
![\"ESP32](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/10\/cpanel-bluehost-file-manager.jpg?resize=794%2C543&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n![\"ESP32](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/06\/ESP32-ESP8266-CPanel-Create-New-PHP-File.png?resize=849%2C346&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n![\"PHP](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/10\/email-notification-php-file-new-created.png?resize=496%2C246&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n<?php\n\n\/*\n Rui Santos\n Complete project details at https:\/\/RandomNerdTutorials.com\/esp32-esp8266-send-email-notification\/\n \n Permission is hereby granted, free of charge, to any person obtaining a copy\n of this software and associated documentation files.\n \n The above copyright notice and this permission notice shall be included in all\n copies or substantial portions of the Software.\n*\/\n\n\/\/ Receiver Email Address (where to send email notification)\n$email_address = "YourEmailAddress@example.com";\n\n\/\/ Keep this API Key value to be compatible with the ESP code provided in the project page. If you change this value, the ESP sketch needs to match\n$api_key_value = "tPmAT5Ab3j7F9";\n\n$api_key = $value1 = $value2 = $value3 = "";\n\nif ($_SERVER["REQUEST_METHOD"] == "POST") {\n $api_key = test_input($_POST["api_key"]);\n if($api_key == $api_key_value) {\n $value1 = test_input($_POST["value1"]);\n $value2 = test_input($_POST["value2"]);\n $value3 = test_input($_POST["value3"]);\n \n \/\/ Email message\n $email_msg = "Temperature: " . $value1 . "\u00baC\\nHumidity: " . $value2 . "%\\nPressure: " . $value3 . "hPa";\n \n \/\/ Use wordwrap() if lines are longer than 70 characters\n $email_msg = wordwrap($email_msg, 70);\n \n \/\/ Uncomment the next if statement to set a threshold \n \/\/ ($value1 = temperature, $value2 = humidity, $value3 = pressure)\n \/*if($value1 < 24.0){\n echo "Temperature below threshold, don't send email";\n exit;\n }*\/\n \n \/\/ send email with mail(receiver email address, email subject, email message)\n mail($email_address, "[NEW] ESP BME280 Readings", $email_msg);\n \n echo "Email sent";\n }\n else {\n echo "Wrong API Key provided.";\n }\n\n}\nelse {\n echo "No data posted with HTTP POST.";\n}\n\nfunction test_input($data) {\n $data = trim($data);\n $data = stripslashes($data);\n $data = htmlspecialchars($data);\n return $data;\n}\n<\/code><\/pre>\n\t\/\/ Receiver Email Address (where to send email notification)\n$email_address = \"YourEmailAddress@example.com\";<\/code><\/pre>\n\n\n\nhttps://example.com\/email-notification.php<\/code><\/pre>\n\n\n![\"ESP32](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/10\/ESP32-ESP8266-Send-Email-PHP-Script-Test.png?resize=687%2C284&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n3. Setting Up Your ESP32 or ESP8266<\/h2>\n\n\n\n
Parts Required<\/h3>\n\n\n\n
\n
![](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2017\/10\/header-200.png?w=1200&quality=100&strip=all&ssl=1\")
<\/a><\/p>\n\n\n\nSchematics<\/h3>\n\n\n\n
BME280 wiring to ESP32<\/h4>\n\n\n\n
![\"BME280](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2018\/03\/ESP32-bme280_bb.png?resize=750%2C652&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n![\"BME280](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/06\/ESP8266-BME280-Arduino-IDE.png?resize=705%2C532&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n![\"ESP32](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/06\/ESP32-BME280-Arduino-IDE-MySQL.jpg?resize=750%2C421&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n![\"ESP32](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/10\/ESP32-ESP8266-Send-Email-Arduino-IDE-Serial-Monitor.png?resize=873%2C493&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n![\"ESP32](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2023\/03\/Sensor-Readings-Email-PHP-ESP32-ESP8266-f.png?resize=250%2C489&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n