Difference between revisions of "MicroPython"
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=WS2812= | =WS2812= | ||
[http://docs.micropython.org/en/v1.8.2/esp8266/esp8266/tutorial/neopixel.html http://docs.micropython.org/en/v1.8.2/esp8266/esp8266/tutorial/neopixel.html] | [http://docs.micropython.org/en/v1.8.2/esp8266/esp8266/tutorial/neopixel.html http://docs.micropython.org/en/v1.8.2/esp8266/esp8266/tutorial/neopixel.html] | ||
<syntaxhighlight lang=" | <syntaxhighlight lang="py"> | ||
from machine import Pin | from machine import Pin | ||
from neopixel import NeoPixel | from neopixel import NeoPixel | ||
| Line 72: | Line 72: | ||
np[2] = (0, 0, 64) | np[2] = (0, 0, 64) | ||
np.write() | np.write() | ||
</syntaxhighlight> | |||
=Color conversion with HSL2GRB= | |||
[https://gist.github.com/dries007/26a2f36770c28500b912b0ecf1276129 https://gist.github.com/dries007/26a2f36770c28500b912b0ecf1276129] | |||
<syntaxhighlight lang="py"> | |||
def hsv_to_rgb(h, s, v): | |||
if s == 0.0: | |||
return v, v, v | |||
i = int(h*6.0) | |||
f = (h*6.0) - i | |||
p = v*(1.0 - s) | |||
q = v*(1.0 - s*f) | |||
t = v*(1.0 - s*(1.0-f)) | |||
i = i%6 | |||
if i == 0: | |||
return v, t, p | |||
if i == 1: | |||
return q, v, p | |||
if i == 2: | |||
return p, v, t | |||
if i == 3: | |||
return p, q, v | |||
if i == 4: | |||
return t, p, v | |||
if i == 5: | |||
return v, p, q | |||
</syntaxhighlight> | </syntaxhighlight> | ||
Revision as of 13:44, 23 April 2018
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
Windows/Mac CP2102 virtual com port driver
If you're running Windows or Mac you may have to install the virtual com port driver.
https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
Firmware
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>
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="py"> from machine import Pin from neopixel import NeoPixel
np = NeoPixel(Pin(2), 3)
np[0] = (255, 0, 0) np[1] = (0, 128, 0) np[2] = (0, 0, 64) np.write() </syntaxhighlight>
Color conversion with HSL2GRB
https://gist.github.com/dries007/26a2f36770c28500b912b0ecf1276129 <syntaxhighlight lang="py"> def hsv_to_rgb(h, s, v): if s == 0.0: return v, v, v i = int(h*6.0) f = (h*6.0) - i p = v*(1.0 - s) q = v*(1.0 - s*f) t = v*(1.0 - s*(1.0-f)) i = i%6 if i == 0: return v, t, p if i == 1: return q, v, p if i == 2: return p, v, t if i == 3: return p, q, v if i == 4: return t, p, v if i == 5: return v, p, q </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, Pin.IN, Pin.PULL_UP)
pin.value()
</syntaxhighlight>
[1]
File system on flash
<syntaxhighlight lang="bash"> import os os.listdir() os.remove('filename') </syntaxhighlight>
Connect through WEBrepl (websocket)
https://learn.adafruit.com/micropython-basics-esp8266-webrepl/access-webrepl
<syntaxhighlight lang="bash"> import webrepl_setup </syntaxhighlight>
Use HTTP and not HTTPS when connecting to the websocket. HTTPS-version doesn't support connecting to HTTP websocket due to mixed content. http://micropython.org/webrepl/
ampy
https://github.com/adafruit/ampy
a file utility tool for MicroPython on ESP8266
