90 lines
2.9 KiB
Python
90 lines
2.9 KiB
Python
# SPDX-FileCopyrightText: <text> 2020 Tony DiCola, James DeVito,
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# and 2020 Melissa LeBlanc-Williams, for Adafruit Industries </text>
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# SPDX-License-Identifier: MIT
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# This example is for use on (Linux) computers that are using CPython with
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# Adafruit Blinka to support CircuitPython libraries. CircuitPython does
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# not support PIL/pillow (python imaging library)!
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import subprocess
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import time
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import busio
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import digitalio
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from board import D4, SCL, SDA
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from PIL import Image, ImageDraw, ImageFont
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import adafruit_ssd1305
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# Define the Reset Pin
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oled_reset = digitalio.DigitalInOut(D4)
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# Create the I2C interface.
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i2c = busio.I2C(SCL, SDA)
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# Create the SSD1305 OLED class.
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# The first two parameters are the pixel width and pixel height. Change these
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# to the right size for your display!
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disp = adafruit_ssd1305.SSD1305_I2C(128, 32, i2c, reset=oled_reset)
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# Clear display.
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disp.fill(0)
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disp.show()
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# Create blank image for drawing.
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# Make sure to create image with mode '1' for 1-bit color.
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width = disp.width
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height = disp.height
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image = Image.new("1", (width, height))
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# Get drawing object to draw on image.
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draw = ImageDraw.Draw(image)
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# Draw a black filled box to clear the image.
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draw.rectangle((0, 0, width, height), outline=0, fill=0)
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# Draw some shapes.
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# First define some constants to allow easy resizing of shapes.
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padding = -2
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top = padding
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bottom = height - padding
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# Move left to right keeping track of the current x position for drawing shapes.
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x = 0
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# Load default font.
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font = ImageFont.load_default()
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# Alternatively load a TTF font. Make sure the .ttf font file is in the
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# same directory as the python script!
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# Some other nice fonts to try: http://www.dafont.com/bitmap.php
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# font = ImageFont.truetype('/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf', 9)
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while True:
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# Draw a black filled box to clear the image.
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draw.rectangle((0, 0, width, height), outline=0, fill=0)
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# Shell scripts for system monitoring from here:
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# https://unix.stackexchange.com/questions/119126/command-to-display-memory-usage-disk-usage-and-cpu-load
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cmd = "hostname -I | cut -d' ' -f1"
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IP = subprocess.check_output(cmd, shell=True).decode("utf-8")
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cmd = "top -bn1 | grep load | awk '{printf \"CPU Load: %.2f\", $(NF-2)}'"
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CPU = subprocess.check_output(cmd, shell=True).decode("utf-8")
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cmd = "free -m | awk 'NR==2{printf \"Mem: %s/%s MB %.2f%%\", $3,$2,$3*100/$2 }'"
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MemUsage = subprocess.check_output(cmd, shell=True).decode("utf-8")
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cmd = 'df -h | awk \'$NF=="/"{printf "Disk: %d/%d GB %s", $3,$2,$5}\''
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Disk = subprocess.check_output(cmd, shell=True).decode("utf-8")
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# Write four lines of text.
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draw.text((x, top + 0), "IP: " + IP, font=font, fill=255)
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draw.text((x, top + 8), CPU, font=font, fill=255)
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draw.text((x, top + 16), MemUsage, font=font, fill=255)
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draw.text((x, top + 25), Disk, font=font, fill=255)
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# Display image.
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disp.image(image)
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disp.show()
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time.sleep(0.1)
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