Today’s project, as always based on the enc28j60 ethernet controller, allows to toggle relays (or, generally, digital PINs) using a responsive web page, that is a page that automatically adapts its layout to devices with different screen sizes (for example your smartphone and your PC). Video presentation Web site The web site, stored on an SD card and…
In my previous tutorial you learned how a sketch, running on the Arduino Yun’s ATMega chip, can execute processes (commands, scripts…) on Linino thanks to the Bridge library. In this tutorial you’ll learn how to do the opposite: send commands from Linino to the sketch that runs on the microcontroller. YunServer & YunClient In my sketch I’ll use two objects from the Bridge library: [checklist] YunServer,…
This tutorial will explain a way to communicate between the sketch running on the ATMega and the Linino (Linux) OS running on the Yun’s SoC: the ability to execute Linux processes from a sketch. I’m going to build a simple SMS alarm: A microswitch is connected to the Arduino when the microswitch is pressed, an SMS is sent using Skebby gateway…
Many PCB services now are able to produce custom shaped PCBs: for example Seeedstudio’s FusionPCB service (I’ve already blogged about it) in the past published photos of round PCBs… and even doll-shaped ones: In this tutorial I’m going to show how to draw custom shaped PCB using Inkscape and Eagle. Workflow Eagle’s PCB editor doesn’t offer advanced drawing tools (Bezier…
I’m working on a project based on a Raspberry Pi, controlled by an external device (laptop, smartphone…) and therefore I was looking for the most universal way to connect the device to the Raspberry. Thanks to a small usb->wifi adapter you can transform the Raspberry in a wireless access point that broadcasts a wireless network your device…
In the previous blog post, you learned how to send big files (html pages, images…) with your ENC28J60 shield. Today I’m going to show you a complete webserver! Description The user’s browser sends a request, through the network, to the ENC28J60 module. The request is analyzed by the sketch that is running on the Arduino, which also prepares the…
In a previous post, I’ve already introduced the UIPEthernet library, that allows to reuse the sketches designed for the official ethernet shield also with the ENC28J60 chip. Some days ago Giorgio (official site), an Arduino maker from the Province of Turin, kindly sent me one of his sketches which uses that library to publish a webserver which let you change the status of…
In the last months, important improvements to the Ethercard library have been made and it’s now possible to send data divided in multiple TCP packets: let’s see how to do it…
With this small tutorial, I’m going to show you how to read the position of a 3-way switch using just one Arduino’s analog PIN. A 3-way switch (sometimes called ON-OFF-ON or SPTT) has 3 PINs: the common (on the center) and the two outputs. When the lever is up or down, the common PIN is connected to one of…
Thanks to Jun Chun, my tutorial about developing Android applications with Bluetooth functionalities has been translated in korean. The five articles are available in two blog posts on Jon’s website, ArsViator: http://arsviator.blogspot.kr/2014/06/bluetooth-programming-in-android-12.html http://arsviator.blogspot.kr/2014/06/bluetooth-programming-in-android-22.html