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MicroPython Cookbook

MicroPython Cookbook

By : Marwan Alsabbagh
3 (8)
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MicroPython Cookbook

MicroPython Cookbook

3 (8)
By: Marwan Alsabbagh

Overview of this book

MicroPython is an open source implementation of Python 3 that runs in embedded environments. With MicroPython, you can write clean and simple Python code to control hardware instead of using complex low-level languages such as C and C++. This book guides you through all the major applications of the MicroPython platform to build and program projects that use microcontrollers. This MicroPython book covers recipes that will help you experiment with the programming environment and hardware programmed in MicroPython. You'll find tips and techniques for building a variety of objects and prototypes that can sense and respond to touch, sound, position, heat, and light. This book will take you through the uses of MicroPython with a variety of popular input devices and sensors. You'll learn techniques to handle time delays and sensor readings, and apply advanced coding techniques to create complex projects. As you advance, you'll deal with Internet of Things (IoT) devices and integration with other online web services. In addition to this, you'll use MicroPython to make music with bananas and create portable multiplayer video games that incorporate sound and light animations into the gameplay. By the end of this book, you'll have mastered the tips and tricks to troubleshoot your development problems and take your MicroPython project to the next level.
Table of Contents (17 chapters)
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Executing commands in the REPL

The following recipe shows different ways that the REPL can be used.

Getting ready

Any one method can be used from the preceding two recipes here to obtain a REPL.

How to do it...

  1. Open the REPL through your preferred application.
  2. Many of the same capabilities provided by the REPL in CPython also work in the MicroPython implementation. The last returned value can be accessed with _:
>>> 2 + 2
4
>>> _ + 2
6
  1. Continuation lines are also supported, making it possible to define functions or for loops through the REPL, as shown in the following output:

>>> def add(a, b):
... return a + b
...
...
...
>>> add(2, 2)
4
>>>
  1. Arbitrary precision integers are also supported, even on constrained microcontroller hardware. The following code shows arithmetic with integers beyond the limit of a 64-bit integer value:
>>> 2**100 + 2**101
3802951800684688204490109616128

How it works...

The REPL implementation has most of the features that we've come to know and love in the CPython implementation. The MicroPython implementation has to deal with tough hardware constraints so that it can run on a microcontroller. But, even with these constraints, the end user experience of the REPL in both implementations is almost identical, making it an easy transition for Python developers.

There's more...

The REPL can be an invaluable tool when you want to experiment with certain MicroPython libraries or certain features on a device. It lets you easily import different Python modules and call functions provided by those libraries in a more direct fashion to discover how they will actually interact with the hardware. Many components on these microcontrollers can be fine-tuned for different project needs. The REPL frequently ends up being an ideal place to do this fine-tuning.

See also

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