bits and pieces

Für den Raspberry Pi wurde gutes Marketing betrieben. Eigentlich sollte man das Ding bestellen können, aber die Farnell-Webseite ist nicht wirklich zu gebrauchen. Es wird interessant sein zu sehen, wie es sich entwickelt. Wenn sie nicht ziemlich sch… more »

Using pyFirmata to read from analog inputs is an easy task. pyFirmate provides a helper function (aka iterator) to simplify the reading. Below is a simple script. import pyfirmata # Definition of the analog pin PINS = (0, 1, 2, 3) # Creates… more »

There are a lot of tutorials available for dimming a LED with sketches. My approach uses pyFirmata to do it. import pyfirmata # Time (approx. seconds) to get to the maximum/minimum DURATION = 5 # Numbers of steps to get to the maximum/minimum… more »

Using Glade and GTK to make a simple GUI is not that hard. If you want to get rid of dealing with the serial connection, using pyFirmata is a good choice. As shown in a previous blog post working with pyFirmata is similar to writing sketches in the A… more »

If your Arduino is running with the latest Firmata firmware (aka sketch), you will notice that not all bindings are still working. This is because the I started with python-firmata more »

Wieso alles selbermachen, wenn andere Menschen das Problem schon gelöst haben? Firmata ist ein Kommuikations-Protokoll und soll die Interaktion von Software auf Host-Systemen mit Microcontroller vereinfachen. Sketch auf Arduino laden: File -> Exa… more »

For my little Arduino and relay project I started with the usage of the Serial monitor to switch the relay and the LED. What's about a nice GUI for doing this? Using Python to grab data from Arduino is easy. The only missing part is the GUI. As t… more »

Switching the Arduino with 0 and 1 is nice but Below 5 the state is 0, values greater than 5 set the state to 1. if (Serial.available() > 0) { inVal = Serial.read() - '0'; if (inVal >= 5) { inState = 1; } else { inState = 0;… more »

Just a little intermezzo...in the previous blog post I wrote about the usage of a single channel relay for switching a fan. Now it's about the controlling the Arduino. Fixed intervals will not really work because I want to switch when I want or when a e… more »

My R2duino has two relays for switching external devices on or off. 60 V AC/DC and 400 mA is nice, but the normal devices 230 V and little bit more A is the standard at least in Switzerland. I made my first steps with a standard case fan with 12 V. T… more »