MircoPython

MicroPython

a software implementation of the Python 3 programming language, written in C, that is optimized to run on a microcontroller

https://docs.micropython.org/en/latest/pyboard/

NodeMCU Devkit

• ESP8266 a microcontroller from Espressif
• Integrated WiFi
• 80MHz clock speed

Install

http://docs.micropython.org/en/v1.8.2/esp8266/esp8266/tutorial/intro.html#deploying-the-firmware

http://micropython.org/download#esp8266 <syntaxhighlight lang="bash"> wget http://micropython.org/resources/firmware/esp8266-20171101-v1.9.3.bin pip install esptool esptool.py --port /dev/ttyUSB0 write_flash 0 esp8266-20171101-v1.9.3.bin </syntaxhighlight>

<syntaxhighlight lang="bash"> esptool.py --port /dev/ttyUSB0 erase_flash </syntaxhighlight>

<syntaxhighlight lang="bash"> esptool.py --port /dev/ttyUSB0 --baud 460800 write_flash --flash_size=8m 0 esp8266-20171101-v1.9.3.bin </syntaxhighlight>

Connect through serial

<syntaxhighlight lang="bash"> screen /dev/ttyUSB0 115200 </syntaxhighlight> Stäng screen: Ctrl+A, k, y

Connect to WiFi

http://docs.micropython.org/en/v1.8.7/esp8266/esp8266/tutorial/network_basics.html

<syntaxhighlight lang="bash"> import network

ap_if = network.WLAN(network.AP_IF) ap_if.disconnect()

sta_if = network.WLAN(network.STA_IF) sta_if.active(True)

sta_if.connect('SSID', 'password') </syntaxhighlight>

<syntaxhighlight lang="bash"> sta_if.ifconfig() </syntaxhighlight>

HTTP GET

<syntaxhighlight lang="bash"> import urequests response = urequests.get("http://tim.gremalm.se/hello") response.text response.close() </syntaxhighlight>

WS2812

http://docs.micropython.org/en/v1.8.2/esp8266/esp8266/tutorial/neopixel.html <syntaxhighlight lang="bash"> from machine import Pin from neopixel import NeoPixel

np = neopixel.NeoPixel(machine.Pin(2), 3)

np[0] = (255, 0, 0) np[1] = (0, 128, 0) np[2] = (0, 0, 64) np.write() </syntaxhighlight>

GPIO

https://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/pins.html <syntaxhighlight lang="bash"> from machine import Pin button = Pin(0) button = Pin(0, machine.Pin.IN, machine.Pin.PULL_UP) pin.value() </syntaxhighlight> [1]

File system on flash

<syntaxhighlight lang="bash"> import os os.listdir() os.remove('filename') </syntaxhighlight>

Connect through websocket

https://micropython.org/webrepl/

https://learn.adafruit.com/micropython-basics-esp8266-webrepl/access-webrepl

<syntaxhighlight lang="bash"> import webrepl_setup </syntaxhighlight>