Difference: HardwareAccessAndMicropython (6 vs. 7)

Revision 72019-06-11 - UliRaich

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META TOPICPARENT	name="WorkshopSlides"

Slide 1: Setting up and IoT

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How to program the processor

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Several development tools are available:

ESP_IDF: The official Espressif development tool.
Includes a gcc compiler for the ESP8266 and the ESP32

Please see:
https://docs.espressif.com/projects/esp-idf/en/latest

The Arduino IDENeeds extensions for these processors
and the different CPU boards

see:

https://docs.espressif.com/projects/esp-idf/en/latest

MicroPython

see:
https://micropython-docs-esp32.readthedocs.io/en/esp32_doc

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Several development tools are available:

ESP_IDF: The official Espressif development tool.
Includes a gcc compiler for the ESP8266 and the ESP32

Please see:
https://docs.espressif.com/projects/esp-idf/en/latest

The Arduino IDE
Needs extensions for these processors
and the different CPU boards

see:

https://docs.espressif.com/projects/esp-idf/en/latest

MicroPython

see:
https://micropython-docs-esp32.readthedocs.io/en/esp32_doc

Flashing the code

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esptool

esptool is called from the Makefiles in ESP-IDF
esptool is used when we upload code from the Arduino IDE to the processor flash

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esptool is used when the Micropython IDE uPyCraft

installs Micropython onto the processor flash

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esptool is used with Micropython IDE on uPyCraft

installs Micropython onto the processor flash

In the above cases the use of esptool is hidden to us.

We can however also execute esptool directly.

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It is written in PyQt4 the Python language binding to Qt4.

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The Linux version did not work for me

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The Linux version did not work for me when running Ubuntu 18.04 or later.

I found a version based on PyQt5 (new version of QT) which was even worse.

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each ws18b12 contains the 3 colored LEDs and a controller.
Can be cascaded and individually addressed, depending on its position in the chain
Needs precise timing

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To use it we pass through the neopixel library built into MicroPython

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To use it we pass through the neopixel library built into micropython

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WS2812B timing

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WS2812B timing

For all the details on the ws2812b look at

https://cdn-shop.adafruit.com/datasheets/WS2812B.pdf

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Cascading the WS2812B

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Cascading the WS2812B

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The SHT30 digital temperature and relative humidity sensor

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The SHT30 is a digital temperature and humidity sensor based on the I2C bus

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The SHT30 is a digital temperature and humidity sensor based on the I2C bus

Here is its data sheet

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Temperature precision: +- 0.3 °C

Relative humidity: +- 3 %

Works on 2.4V – 5.5 V

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While for the course we only use the CPU and 2 sensor shields:

ESP8266 CPU (a more powerful ESP32 CPU exists)
SHT30 temperature and humidity sensor

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WS2812B rgb LED (neopixel)

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Ws2812B rgb LED (neopixel)

there are many more available on the market.

We have a dozen such shields here for demo.

All demo programs can be found at:

https://github.com/uraich/MicroPython_IoTDemos

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