Donnerstag, 29. Mai 2014

Arduino without IDE

For my pet project I need to upload sketches to Arduino board connected to RaspPI. As usual I have only SSH access to PI and don't want to install a lot of unnecessary packages. So the only one thing you have to install it arduino-mk package:

 $ sudo apt-get install arduino-mk  

Montag, 26. Mai 2014

RFID sensor (Funduino RFID-RC522)

Recently I bought a set of Arduino-compatible components including RFID sensor (RC522).

After short search I've found good tutorial telling how to use this sensor, downloaded a library and connected sensor to my Arduino (be careful there is a typo in original blog post):
  • MOSI: Pin 11
  • MISO: Pin 12
  • SCK: Pin 13
  • SS: Pin 10
  • RST: Pin 5
  • GND: Gnd
  • VCC: 3V3

Freitag, 9. Mai 2014

Connect RaspPI to WiFi

Recently I've ordered two WiFi dongles for my Raspberry PI home project and today I received a parcel.

2 x Wireless Adapter Network LAN Card 802.11n/g/b 2.4GHz - $3.41 / piece

Honestly said I had to investigate this topic before purchase, but in fact when I connected it to PI and set up wireless connection I was upset - it seemed not working.

Donnerstag, 1. Mai 2014

Ultrasonic Sensor: first try

After few weeks waiting they finally came to me direct from China: my new Arduino Nano and a couple of ultrasonic sensors.


  • 1 x Ultrasonic Module HC-SR04 Distance Measuring Transducer Sensor - $2.56 / piece
  • 1 x Funduino Nano 3.0 controller - $7.89 / piece.
As soon as I have time I decided so do simple experiment.

First of all I connected VCC and GND pins to common rails and then to corresponding pins of ultrasonic sensor. After that I connected Trigger to Pin 3 and Echo to Pin 2 of Arduino board. As in many existing examples I decided to output signal through Piezo Buzzer. I simply connected Pin 4 of Arduino to positive leg of buzzer and the other leg to common ground.