Category: Python
Cartesian Coordinates with matplotlib
In this post we’ll create an orthonormal Cartesian plane with x axis, y axis and origin, using matplotlib. If you’re using jupyter first include this line to get inline charts: %matplotlib... Read More
Controlling the Pi Rover over SSH
Introduction We have seen how to control the Pi Rover over HTTP. However, you may find it a bit of an overkill to install a webserver bundled with PHP just to control the motors. A leaner alternative ... Read More
Controlling the Pi Rover over HTTP
Introduction Now that we have a programmable robotic platform, built with a Raspberry Pi, a motor controller and a chassis, we’d like to control it remotely, from a PC and later maybe from a mob... Read More
The HC-SR04 ultrasound range finder on Raspberry Pi
Introduction The HC-SR04 can be used to measure distance and detect obstacles in robotic projects. However, the reported range is not always accurate, small objects are mostly not detected at all and ... Read More
Pi Rover: Raspberry Pi with a DMC02 motor controller
Introduction We’ll build a mobile robotic platform with a Raspberry Pi on a chassis. A Pololu DMC02 motor controller board is used to drive the engines. The controller receives serial commands f... Read More
Daylight controlled devices with PyEphem
I needed a camera to be turned off at night and a PIR sensor (controlling a light switch) to be turned on. A photoresistor would be an obvious choice here, but we can also accurately calculate twiligh... Read More
Motion detection with Raspberry Pi
To detect intruders in my living room I used the PIR sensor from a Funduino starter kit. A Python script triggers some appropriate actions when motion is detected. Set the jumper on the sensor PCB to ... Read More
Retrieving Google geocoded co-ordinates in Python
Import the json and the urllib2 modules: import json, urllib2 Programmatically contruct the URL to meet the requirements of the the geocoding webservice, i.e. make it look like this (click to view the... Read More
Wardriving using an Ubuntu 10.04 notebook and a Garmin Etrex
Most GPS software that ships with Ubuntu 10.04 uses gpsd to retrieve data from the GPS receiver. So make sure that you have gpsd installed. Unfortunately the new JSON protocol used by gpsd is not supp... Read More