Difference: Introduction (2 vs. 3)

Revision 32020-04-29 - UliRaich

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Introduction

The Internet of Things

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Many of the software drivers for sensor readout are already embedded in the Python interpreter but students can also write their own drivers and add them to the system. For the "high flyers" it is also possible to write drivers in C, e.g. when speed is of utmost importance, and to integrate them into the Python interpreter. This however requires some knowledge of the inner workings of MicroPython.

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While the course on embedded systems exclusively looked into device readout and control, the Internet access and more specific WiFi access, will be part of this course.

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While the course on embedded systems exclusively looked into device readout and control, the Internet access and more specific WiFi access, will be part of this course.

Comparison Raspberry Pi versus WeMos D1 Mini ESP32

The previous course was based on the Raspberry Pi, probably one of the most powerful micro-controller systems available today. It uses a Broadcom BCM2837 64 bit quad core ARM CPU and it runs a full Linux operating system. You only need to add a micro-SD card for the OS, a keyboard and mouse and a screen to make it a full blown computer. It has 1 GBytes of RAM, 32 GBytes of SD card for the systems we used and a 40 pin extended GPIO connector to interface to external devices. I2c and SPI interfaces are available on this connector. It still does not have the power of a standard PC but it can be used to develop programs, in whatever computer language available in Linux, natively on the machine. The typical cost of such a system is in the order of 70-100 US $ excluding the screen, keyboard and mouse. Of course it would have been possible to use the Raspberry Pi also for the IoT course with Python we are talking about now.

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