An Arduino library for I²C GPIO-expander with sample code. To operate the port for input, the IO pins can be configured bit by bit. The config bit for output is 0 and input is 1. When the bit 0 to 4 ...

Both the MRAA and Arduino APIs are available in the Arduino Create environment and you can choose which to use, but why are there two APIs to program sensors and actuators? To answer this let's list ...

GPIOViewer is an open-source Arduino library allowing users to monitor the GPIO pins status of their ESP32 board in real-time in a web browser for troubleshooting or fun. It’s different than the Wokwi ...

Last week, we covered the Maker Go RA4M1-R4 development board, an inexpensive “clone” of the Arduino UNO R4 Minima with some small modifications like support for up to 50V DC input and a 3.3V/5V ...

Charlieplexing is a technique of controlling many LEDs using a few I/O pins. Charlieplexing is same as multiplexing, but it uses the tri-state logic (high, low input) to reduce the number of pins ...

You might be wondering why the Raspberry Pis are so popular despite there are desktops or laptops that are much more powerful than a Pi. Apart from the small form factor and low power usage one of the ...

Abstract: This work aims at building a working model for a complete intercom door lock system using Arduino and Raspberry Pi. The goal has been to unite the best of Raspberry Pi and Arduino in a ...