Zumo George, a BDD rover made with Raspberry Pi #piday #raspberrypi @Raspberry_Pi
Great article from RaspTut on building a BDD rover with a Raspberry Pi.
It is time to build a new rover, and to take a different look at how we can determine how it is controlled by a series of behaviours, defined using the tenets of Behaviour-Driven Development. BDD is a superb way to undertake development as it emphasises genuine communication and collaboration between business stakeholders, Developers and Testers. Behaviours are defined as features and scenarios, the latter elicited as specific examples using the Gherkin syntax, for example:
Scenario: Drive forwards
Given Zumo George is greater than 10cm from a wall
When power is applied to the motors
Then Zumo George should drive forwards
BDD scenarios are written before other code, and determine what code is written. Hence no wastage: we develop what is required and it most likely passes first time. When the scenarios (the tests) are executed we can clearly see which steps pass (green), fail (red), or have not yet been implemented (that sort of muddy green-yellowy-brown).
I will be exploring the use of BDD to program this rover in quite some depth over a number of articles, intermixing some electronics to show how BDD is an ideal abstraction to explore behaviour-based robotic control. I’m going to term this BDR, Behaviour-Driven Robotics.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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