This project demonstrates a simple light-sensitive switch: it turns lights OFF during the day and ON at night. Ideal for street lights, garden illumination, or home automation.

To control multiple RGB LEDs using fewer GPIO pins via a multiplexer (MUX), often for visual indication, lighting, or status feedback in IoT systems

Introducing the Water Wastage Alarm System — a smart, low-cost solution for Indian households to prevent overhead tank overflows. Using an ultrasonic sensor, this system monitors the water level in real-time, activating an alarm when the tank is full. The system displays the water level on an OLED screen, signals warnings with LED indicators, and can even send SMS alerts via the SIM800L module. Not only does it save water and reduce energy bills, but it’s also affordable, easy to install, and perfect for promoting water conservation in every home. A practical and sustainable solution powered by the H2S-Dev board!

A device that receives data through RS232 and sends it wirelessly via Bluetooth.

Uma torneira pensada para facilitar manutenção, adaptação e montagem industrial, com design desmontável, vedação precisa e alavanca ergonômica de alto desempenho.

The chicken coop door opener is based on ESP8266 board and it is controlled remotely by the Blynk App. It uses geared motor with 30 RPM, which have enough power to move the door. It is controlled by L298N board. For the supply of the motor is used 12V 3A AC/DC module. The microcontroller is supplied by 5V linear regulator board. The whole system is placed in a hermetic plastic box.

How to build a simple Meshtastic IoT sensor grid with the ThinkNode M1 & M2 devices.

The ESP8266 NodeMCU 4-Channel Relay Module project enables easy remote control of up to four appliances in your home using Wi-Fi. By leveraging the ESP8266 NodeMCU and a simple web interface, users can control devices like lights and fans from anywhere. This cost-effective IoT solution provides seamless home automation, turning any home into a smart home with just a few clicks. Perfect for DIY enthusiasts looking to dive into the world of IoT and home automation!

The Elecrow M1 Meshtastic device has caught my attention with its unique e-paper display and solid feature set. As someone passionate about IoT, GPS tracking, and mesh network devices, I’ve put this compact node through its paces to see how it performs in real-world scenarios. In this review, I’ll walk you through the ThinkNode M1’s standout features, usability, firmware updates, and how it integrates with the Meshtastic ecosystem. Whether you’re considering this device for your next project or just curious about its capabilities, this deep dive will give you a clear picture of what to expect.