In this tutorial, we will learn how to make HTTP POST requests with ESP32 and Arduino IDE. For demonstration, we will send HTTP POST requests to APIs like ThingSpeak and IFTTT. The ESP32 Dev board is quite powerful and also has built-in WiFi capability, which makes it an ideal choice for IoT projects. When working … Read more
In this tutorial, we will learn how to utilize the ESP32 with the Arduino IDE to create HTTP GET requests for commonly used APIs like ThingSpeak and OpenWeatherMap.org. The ESP32 development board is quite powerful and also has built-in WiFi capability, which makes it an ideal choice for IoT projects. When working on IoT projects, … Read more
One of the best projects you can consider doing with ESP32 is to control a 220-volt lamp from a web server. But you can also use the same procedure to control fans, lights, AC, or other electrical devices that you want to control remotely. This tutorial is about controlling a relay and a 220-volt lamp … Read more
As the Internet of Things (IoT) becomes more prevalent in our daily lives, there is a growing need for devices to communicate with each other seamlessly. The ESP32 microcontroller, with its Wi-Fi and Bluetooth capabilities, has become a popular choice for IoT projects. And when it comes to automation, IFTTT (If This Then That) is … Read more
In this tutorial, we will learn how to use an external interrupt to wake up the ESP32 from a deep sleep. There are two external wake up resources available such as an ext0 and ext1. When the state of a GPIO pin is changed, the ESP32 will wake up from deep sleep. There are two … Read more
In this tutorial, we will learn to use ESP32 touch pins as a wake-up source from a deep sleep. First, we will put ESP32 into deep sleep mode and then see how to wake it up using touch sensor pins. When the ESP32 is in deep sleep, it consumes very low power, making it an … Read more
In this tutorial, we will learn to use Timer as a wake-up resource from a deep sleep. First, we will put ESP32 into deep sleep mode and then see how to wake it up using a predefined time using a timer. Recommended Components The following components are used in this project or are helpful for … Read more
This tutorial will teach you how to capture and save a photo using the ESP32-CAM module onto a MicroSD card, including a timestamp as a filename with the current date and time. The image will be saved with a filename consisting of the date and time it was taken. ESP32 will get updated time from … 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 create a ROS Range publisher Node on Arduino that publishes HC-SR04 ultrasonic sensor readings on ROS “/ultrasound” topic using rosserial and how to read range topic readings in ROS. Before that, we will introduce you to HC-SR04 sensor and interface it with Arduino to build the Arduino ROS range publisher … Read more