In this tutorial, we will see how to erase the flash memory of an ESP32 using the esptool.py command-line utility in Windows, Linux, and MacOS, and discuss why and when you might want to do this. As with any electronic device, there may be times when you need to reset the ESP32 to its factory … Read more
In this tutorial, you will learn to send sensor readings via email with an SMTP client and MicroPython using ESP32 or ESP8266. For demonstration purposes, we will send BME280 sensor readings such as temperature, pressure, and humidity to the Gmail SMTP server but you can modify this example for any sensor and SMTP server. Recommended … Read more
In this tutorial, you will learn to send emails with an SMTP client and MicroPython using ESP32. We will learn to send emails to SMTP servers such as Gmail, Hotmail, and Outlook. The umail is a lightweight, scalable SMTP client for sending emails in MicroPython. For demonstration, we will send a simple text message in … Read more
In this tutorial, we will see how to send text messages with ESP32/ESP8266 and Twilio using MicroPython. Twilio is a communications web service that allows users to make and receive phone calls and SMS along with other communication functions. Although Twilio is not free to use but you can get started with a free trial … Read more
In this tutorial, we will show you how to send Whatsapp messages to your account with ESP32 and ESP8266 using Whatabot or callmebot free APIs and MicroPython. You can use any one of them. But we will use callmebot API for demonstration. These free WhatsApp APIs can be helpful in sending message notifications, sensor readings, … Read more
In this tutorial, we will learn how to set up ESP32 as a BLE server and use the GATT service to send battery levels to the Android app. For demonstration, we will use the GATT service to send battery percentage levels to our android smartphone from ESP32. The ESP32 board will therefore act as a … Read more
In this tutorial, we will learn to make HTTPS requests with ESP32 (Hypertext Transfer Protocol Secure). We will briefly introduce you to HTTPS, SSL/TLS Certificates, how to obtain a server’s certificate and then finally program our ESP32 board to make HTTPS requests. We will show you two library examples for generating in Arduino IDE. These … Read more
In this tutorial, we will introduce you to Twilio with ESP32 to send text messages. Twilio is a communications web service that allows users to make and receive phone calls and SMS along with other communication functions. Although Twilio is not free to use but you can get started with a free trial account as … Read more
In this tutorial, we will learn about ESP32 I2C communication protocol using different I2C devices having same and different addresses. We will discuss how to use multiple I2C devices with ESP32 having the same address by incorporating a hardware solution. By using a TCA9548A I2C Multiplexer, we will be able to increase the I2C addresses … Read more
In this user guide we will learn to interface RCWL-0516 microwave radar sensor module with ESP32 using Arduino IDE and create an example for motion detection. We will discuss the components of RCWL-0516 sensor module, pinout, configuration, features, specifications, interfacing, 2D model, and applications. We have similar guides with Arduino and ESP8266 NodeMCU: Recommended Components … Read more