Tutorials

In this tutorial, we will explore how to interface an ESP8266 with the nRF24L01 wireless module. The nRF24L01 is a low-power, 2.4GHz wireless transceiver module that is commonly used in short-range wireless communication. It communicates over SPI, while the ESP8266 is a Wi-Fi-enabled microcontroller that can be programmed using the …

I have shown how you can use ESP8266 to host a web server via HTTP and via WebSocket, use MQTT and ThingSpeak for sensor data, and even use Google Sheets. This time, I will be sharing with you how I send data between two ESP8266.

Stepper motors are widely used in various applications due to their precise control over position and speed. They are commonly found in 3D printers, CNC machines, and robotics. In this article, we’ll explore how to control a stepper motor using an ESP32 microcontroller and set up a simple web server …

The MLX90614 is a really cool infrared thermometer sensor that can measure temperature without even touching an object. It works by detecting infrared radiation (heat) emitted by an object and converting it into a temperature reading. This makes it perfect for projects where you want to measure temperature from a …

When working with Segger Embedded Studio (SES) and Nordic's nRF52 chips, one of the quickest ways to get started is by using an existing project template. It simplifies project setup, reducing the need for manual configuration, and you can focus on development right away. In this guide, I'll walk you …

Consider a project requirement, where you have to read from an analog sensor, update a display and flash an LED simultaneously. This might be a challenging coding assignment if you haven’t heard of an RTOS before.  RTOS allows you to process multiple “tasks” concurrently. This is in contrast with a …

The ESP32 microcontroller is a powerful and versatile platform, widely used in IoT applications due to its built-in Wi-Fi and Bluetooth capabilities. One of its standout features is support for Bluetooth Low Energy (BLE), which is an energy-efficient version of Bluetooth designed for IoT devices, wearable tech, smart home gadgets, …

LwIP (Lightweight IP) is a small TCP/IP stack used in embedded systems like STM32. It helps devices communicate over networks using internet protocols. In this post, I will show how to set up LwIP in "raw" mode for an STM32F407 microcontroller. What is LwIP Raw Mode? In raw mode, LwIP …

The nRF52832 is a versatile SoC (System on Chip) from Nordic Semiconductor that supports various features, including Flash Data Storage (FDS) for non-volatile data management. This post gives some basic examples of how to use FDS to save, delete, and update data, as well as how garbage collection works to …

  A PID controller is a must-have for any control system aiming for stability. I’ve introduced how to implement PID using an Arduino microcontroller. Now, I’ll be applying PID in the design of a beginner robot project, a line follower. A line follower does what it’s named after. An optical …