Hardware: To test the wiring we suggest you to use the ping/pong test you can find  in the RF24 libraries (both, of the raspberry and the arduino). Raspberry Pi The connection between the Raspberry Pi and the NRF24l01+ module was a little bit tricky, so you have to double ( or triple) check the wiring […]
[ARDUINO + RASPBERRY PI] Switching light with NRF24l01+ Read More »
Relay I/O Board is widely used in applications of smart home project. In this article, I will detail how to control the Relay I/O board using Raspberry Pi with Raspberry Pi Universal Expansion Board via internet. The codes and schematic diagrams used in this article was listed at the end of this article. Part I:
Raspberry Pi with Relay I/O Board Read More »
The latest big news in the world of Raspberry Pi Python GPIO programming is that Ben Croston has released an update for RPi.GPIO. Why is that a big deal? Because this version has interrupts. “What’s an interrupt?” I hear you say. It’s a way of waiting for something to happen without checking constantly whether or
How to use interrupts with Python on the Raspberry Pi and RPi.GPIO Read More »
The first step of building the Raspberry Pi-powered speaking doorbell is building a simple input circuit. The purpose of the input circuit is to protect the Pi from damage by electrically isolating the doorbell and its power supply from the Raspberry Pi itself. The circuit design and a full description of how it works can
The Raspberry Pi Powered Speaking Doorbell – Part 1: The Input Circuit Read More »
I have no background in electronics, but the Raspberry Pi has given me an incentive to learn. Some time ago I made a Raspberry PI weather camera (it will be subject of a separate post here at some later stage) which has now operated continuously for over two months in very mixed weather. Sometimes, the
Raspberry Pi – Controlling a Relay Read More »
Today we will see how to interfacing the Raspberry Pi with a matrix keypad using Rpi-hw library. The library provides the class keypad::matrix↱, defined in “rpi-hw/keypad/matrix.hpp”↱, with which it is possible to manage keypads of any size. Its constructor method takes two ordered lists containing the GPIO pins used by the device: keypad::matrix( { COL0,
Raspberry Pi with a keypad matrix Read More »
Thanks to RaspberryPi.org for flagging the work of Gadget Nut, who is definitely a Gadet Master, too. They have been working on the PrivateEyePi project, building a DIY Home alarm system. It is modestly described as a simple system that can link to existing door contacts or alarm sensors, and there is also a Web
How to build your own Raspberry Pi home alarm system Read More »
Overview Here I will be showing you how to turn on and off a lamp from anywhere in the world. However, you can control any device that works by toggling its power source, such as a fountain, TV, Christmas tree lights, projector, etc. Required Hardware Raspberry Pi Internet Connection (Ethernet or WiFi) Device Under Control
Make an Internet Controlled Lamp with a Raspberry Pi and Flask Read More »
For this project we will be using four of the Raspberry Pi’s GPIO pins, two per motor.  In the diagram below you will see a diagram of a L298N (hopefully yours will look the same or very similar).  Each motor will have two wires running from them, this will allow us to connect them to “output
Raspberry Pi Robot – Connecting the H-Bridge & Motors Read More »
In this brief guide we will show you how to connect up two LEDs to the GPIO ports on your Raspberry Pi and control them via Python Script.  From this point onwards I will assume that your Raspberry Pi has a fully working install of Raspbian and is connected to your WiFi or Wired Network.  Rather
Raspberry Pi Robot – Flashing LEDs – The Circuit Read More »
