Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — ...

Project Description This system integrates an Arduino Uno with an ESP8266 WiFi module to create a responsive home automation controller. It supports up to four relay-connected devices, allowing users ...

PWM may be used on pins 0 to 15. Call analogWrite(pin, 0) to disable PWM on the pin. Pin interrupts are supported through attachInterrupt, detachInterrupt functions. Interrupts may be attached to any ...

Setup is fairly simple with downloads for Linux, OS X, and Windows. This isn’t an ESP8266 shield, either: you can write code for the ESP module, connect the serial pins, and hit the program button.

I/O Voltage – 5V DC Current per I/O pin – 8 mA Arduino UNO R4 WiFi only Qwiic I2C connector for expansion modules. 3-pin header with an “OFF” pin to turn off the board and a “VRTC” pin to keep the ...