Difference: HardwareAccessAndMicropython (2 vs. 3)

Revision 32019-05-14 - UliRaich

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META TOPICPARENT name="WorkshopSlides"
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Hardware access and Micropython

  Start Presentation

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Setting up an IoT

Session 2: Micropython and
Hardware access

Uli Raich
Formally CERN, Geneva, Switzerland

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Setting up and IoT

Session 2: Micropython and
Hardware access

Uli Raich
Formally CERN, Geneva, Switzerland

 

The WeMos D1 mini CPU card

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esp8266.png wemosEsp32.png
ESP8266 CPU ESP32 CPU
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esp8266.png wemosEsp32.png

ESP8266

cost: 2.21 Euros

ESP32

cost: 4.1o Euros
 

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CPU PinOut

esp8266Pinout.png esp32Pinout.png
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CPU Pinout

esp8266Pinout.png esp32Pinout-v2.png
 
ESP8266 ESP32
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>		Please note: The pin numbers IOxx on the ESP32 correspond

to the GPIO pin numbers

 
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<		Please note that the numbers IOxx for the ESP32 correspond to the GPIO numbers.
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>		The pins in the white fields go to the WeMos D1 mini bus
 
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<		So..., IO22 corresponds to GPIO 22.
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>		and are also available on the ESP8266
 
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<		The same is not valid for the numbers Dx in the ESP8266 case.
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>		The other pins are only accessible on the ESP32 CPU card
 
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<		Please see the next slide for the correspondence.
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>		The pin numbers Dx do not correspond to GPIO pin numbers!

Please refer to the next slide for correspondence

 

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Comparison PinOut
ESP8266 versus ESP32 for reference

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CPU pinouts for reference

  cpuPinouts.png
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Meaning of pins on ESP8266

  • GPIO: General Purpose Input Output.
    Drives a single digital line which
    can be programmed input or output
  • SCL/SDA: The I2C bus:a 2 wire bus
    interfacing sensors or actuators to the CPU

  • SCL,MISO,MOSI,SS: SPI
    the Serial Peripheral Interface.
    Used fast communication with external device
 esp8266PinMeaning.png

Meaning of pins on ESP32

esp32-pinout-chip-ESP-WROOM-32.png

How to program the processor

esp8266Programming.png 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://www.arduino.cc/en/Main/Software

  • MicroPython

see:
https://micropython-docs-esp32.readthedocs.io/en/esp32_doc/
and
https://github.com/micropython/micropython/
 %SLIDESHOWEND%

Uli Raich - 2019-05-13

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