Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — either via Bluetooth or Wi-Fi.

Summary: This setup and code are designed to monitor power status and use the SIM800H module to send SMS alerts in case of a power outage or restoration. The hardware connections are straightforward, ...

This Arudino project reads Capacitive Soil Moisture Sensors, measures soilMoistureValue vs AirValue vs WaterValue, and then triggers a relay module to switch water pumps on/off when needed. - ...