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stats.py
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#! /usr/bin/python3
# Copyright (c) 2017 Adafruit Industries
# Author: Tony DiCola & James DeVito
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
# Portions copyright (c) NVIDIA 2019
# Portions copyright (c) JetsonHacks 2019
import time
import Adafruit_SSD1306 # This is the driver chip for the Adafruit PiOLED
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
import subprocess
def get_network_interface_state(interface):
return subprocess.check_output('cat /sys/class/net/%s/operstate' % interface, shell=True).decode('ascii')[:-1]
def get_ip_address(interface):
if get_network_interface_state(interface) == 'down':
return None
cmd = "ifconfig %s | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1'" % interface
return subprocess.check_output(cmd, shell=True).decode('ascii')[:-1]
# Return a string representing the percentage of CPU in use
def get_cpu_usage():
# Shell scripts for system monitoring from here : https://unix.stackexchange.com/questions/119126/command-to-display-memory-usage-disk-usage-and-cpu-load
cmd = "top -bn1 | grep load | awk '{printf \"CPU Load: %.2f\", $(NF-2)}'"
CPU = subprocess.check_output(cmd, shell=True)
return CPU
# Return a float representing the percentage of GPU in use.
# On the Jetson Nano, the GPU is GPU0
def get_gpu_usage():
GPU = 0.0
with open("/sys/devices/gpu.0/load", encoding="utf-8") as gpu_file:
GPU = gpu_file.readline()
GPU = int(GPU)/10
return GPU
# 128x32 display with hardware I2C:
# setting gpio to 1 is hack to avoid platform detection
disp = Adafruit_SSD1306.SSD1306_128_32(rst=None, i2c_bus=1, gpio=1)
# Initialize library.
disp.begin()
# Clear display.
disp.clear()
disp.display()
# Create blank image for drawing.
# Make sure to create image with mode '1' for 1-bit color.
width = disp.width
height = disp.height
image = Image.new('1', (width, height))
# Get drawing object to draw on image.
draw = ImageDraw.Draw(image)
# Draw a black filled box to clear the image.
draw.rectangle((0, 0, width, height), outline=0, fill=0)
# Draw some shapes.
# First define some constants to allow easy resizing of shapes.
padding = -2
top = padding
bottom = height-padding
# Move left to right keeping track of the current x position for drawing shapes.
x = 0
# Load default font.
font = ImageFont.load_default()
while True:
# Draw a black filled box to clear the image.
draw.rectangle((0, 0, width, height), outline=0, fill=0)
# Shell scripts for system monitoring from here : https://unix.stackexchange.com/questions/119126/command-to-display-memory-usage-disk-usage-and-cpu-load
cmd = "free -m | awk 'NR==2{printf \"Mem: %.0f%% %s/%s M\", $3*100/$2, $3,$2 }'"
MemUsage = subprocess.check_output(cmd, shell=True)
cmd = "df -h | awk '$NF==\"/\"{printf \"Disk: %d/%dGB %s\", $3,$2,$5}'"
Disk = subprocess.check_output(cmd, shell=True)
# Print the IP address
# Two examples here, wired and wireless
draw.text((x, top), "eth0: " +
str(get_ip_address('eth0')), font=font, fill=255)
# draw.text((x, top+8), "wlan0: " + str(get_ip_address('wlan0')), font=font, fill=255)
# Alternate solution: Draw the GPU usage as text
# draw.text((x, top+8), "GPU: " +"{:3.1f}".format(GPU)+" %", font=font, fill=255)
# We draw the GPU usage as a bar graph
string_width, string_height = font.getsize("GPU: ")
# Figure out the width of the bar
full_bar_width = width-(x+string_width)-1
gpu_usage = get_gpu_usage()
# Avoid divide by zero ...
if gpu_usage == 0.0:
gpu_usage = 0.001
draw_bar_width = int(full_bar_width*(gpu_usage/100))
draw.text((x, top+8), "GPU: ", font=font, fill=255)
draw.rectangle((x+string_width, top+12, x+string_width +
draw_bar_width, top+14), outline=1, fill=1)
# Show the memory Usage
draw.text((x, top+16), str(MemUsage.decode('utf-8')), font=font, fill=255)
# Show the amount of disk being used
draw.text((x, top+25), str(Disk.decode('utf-8')), font=font, fill=255)
# Display image.
# Set the SSD1306 image to the PIL image we have made, then dispaly
disp.image(image)
disp.display()
# 1.0 = 1 second; The divisor is the desired updates (frames) per second
time.sleep(1.0/4)