The ESP32-C3 Super Mini is one of those tiny development boards that looks almost too small to be useful at first. But once you plug it in and get past the first upload, it becomes a very handy board for compact Wi-Fi and BLE projects. It is smaller than the usual …
Read More »
An SSH server on ESP32 lets you log in to your microcontroller over Wi-Fi using a secure terminal connection. Instead of opening the Arduino Serial Monitor through USB, you can connect from a computer, phone, or another device on the same network and send commands remotely. In this tutorial, you …
Read More »
The TP4056 charging module is one of the most common boards used for adding USB charging to small battery-powered electronics projects. If you are building an Arduino, ESP32, Raspberry Pi Pico, sensor, robot, or portable display project, this module can charge a single 3.7 V lithium-ion or lithium-polymer battery from …
Read More »
The Raspberry Pi 5 is powerful enough to run vision, robotics, and automation projects, but its GPIO pins cannot directly drive DC motors. A motor needs more current than a Raspberry Pi GPIO pin can provide, and motors also generate electrical noise that can damage sensitive electronics. That is where …
Read More »
The ESP32-S3 is one of the most useful ESP32 boards for modern microcontroller projects. It keeps the Wi-Fi and Bluetooth features that made the original ESP32 popular, but adds better USB support, more memory options, and features aimed at AI, signal processing, and Human Interface Device applications. If you are …
Read More »
The ESP32 is powerful enough to host a small web server directly on the board. This means you can control LEDs, read sensor values, update a webpage, or build a simple browser-based dashboard without needing a separate computer or cloud server. One of the most useful libraries for this is …
Read More »
If you are connecting an ESP32 to a UART device, both sides normally need to use the same baud rate. For example, if your external module is sending data at 9600 baud but your ESP32 is listening at 115200 baud, the data will not be read correctly. Fortunately, some ESP32 …
Read More »
flashWhen compiling embedded C or C++ firmware, you will often see compiler flags such as -O0, -O1, -O2, -O3, -Os, and -Og. These are compiler optimization levels. They tell the compiler how much effort it should spend improving the generated machine code. For desktop applications, optimization usually means “make the …
Read More »
In embedded systems, every byte matters. Whether you are working with a small 8-bit microcontroller, an ARM Cortex-M device, or a memory-constrained IoT module, understanding how data is stored in memory can help you write more efficient and reliable firmware. One common source of confusion is the size of struct …
Read More »
Attackers rarely announce themselves. More often, they find a quiet side entrance, and firmware is exactly that. It's the invisible software layer that wakes your device before anything else does, and it's become one of the most exploited attack surfaces in modern security. The numbers are hard to ignore: only …
Read More »