Hacky script to display data on Raspi-connected oled screen and motioneye overlay. Need to rewrite this into separate polling/data collection and consumer components.

cam_and_display_show_stats.py

#!/usr/bin/python

# Original file: https://github.com/adafruit/Adafruit_Python_SSD1306/blob/master/examples/stats.py
# Modified by Antti 'harakka' Riikonen for personal use, to display readings
# from AM2302 sensor, the library for which is also from Adafruit. You rock.
# Original license follows.

# 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.

import time
import signal
import os

import Adafruit_GPIO.SPI as SPI
import Adafruit_SSD1306
import Adafruit_DHT

from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont

import subprocess

# Signal handler turns screen and camera overlay off and dies
def handleSignal(signal, frame):
    print 'Signal ',signal,' received, shutting gracefully.'
    disp.command(Adafruit_SSD1306.SSD1306_DISPLAYOFF)
    urlencoded_text = "Temp%3A%20NA%5CnHum%3A%20%20NA".format(temperature,humidity)
    with open(os.devnull, "w") as void:
    subprocess.call(["/usr/bin/curl", "--silent", "--show-error", "http://localhost:7999/1/config/set?text_left={}".format(urlencoded_text)], stdout=void)
    exit(0)

'''
# Set up interrupt signals for capture
# Actually we don't need this since the finally block will handle cleanupsignal.signal(signal.SIGHUP, handleSignal)
signal.signal(signal.SIGINT, handleSignal)
signal.signal(signal.SIGQUIT, handleSignal)
signal.signal(signal.SIGABRT, handleSignal)
signal.signal(signal.SIGBUS, handleSignal)
signal.signal(signal.SIGFPE, handleSignal)
signal.signal(signal.SIGSEGV, handleSignal)
signal.signal(signal.SIGTERM, handleSignal)
'''

# Temperature sensor setup
sensor = Adafruit_DHT.AM2302
DHTPin = 4

# Raspberry Pi pin configuration:
RST = None     # on the PiOLED this pin isnt used
# Note the following are only used with SPI:
DC = 23
SPI_PORT = 0
SPI_DEVICE = 0

disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST)

# Note you can change the I2C address by passing an i2c_address parameter like:
# disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST, i2c_address=0x3C)

# Alternatively you can specify an explicit I2C bus number, for example
# with the 128x32 display you would use:
# disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST, i2c_bus=2)

# Initialize library.
disp.begin()

# Clear display.
disp.clear()
disp.display()

# Set brightness
disp.set_contrast(1)

# 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()
if os.access("/home/pi/MiniSet2.ttf", os.R_OK):
    font = ImageFont.truetype("/home/pi/MiniSet2.ttf", 8)
else:
    font = ImageFont.load_default()

# Alternatively load a TTF font.  Make sure the .ttf font file is in the same directory as the python script!
# Some other nice fonts to try: http://www.dafont.com/bitmap.php
# font = ImageFont.truetype('Minecraftia.ttf', 8)

try:
    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 = "hostname -I | cut -d\' \' -f1"
        IP1 = subprocess.check_output("ip -4 -h addr show dev wlan0 | grep inet | xargs | cut -d \' \' -f 2", shell = True )
        IP2 = subprocess.check_output("ip -4 -h addr show dev eth0 | grep inet | xargs | cut -d \' \' -f 2", shell = True )
        cmd = "top -bn1 | grep load | awk '{printf \"CPU Load: %.2f\", $(NF-2)}'"
        CPU = subprocess.check_output(cmd, shell = True )
        cmd = "free -m | awk 'NR==2{printf \"Mem: %s/%sMB %.2f%%\", $3,$2,$3*100/$2 }'"
        MemUsage = subprocess.check_output(cmd, shell = True )
        cmd = "df -h | awk '$NF==\"/\"{printf \"Disk: %d/%dGB %s\", $3,$2,$5}'"
        Disk = subprocess.check_output(cmd, shell = True )

        # Try to grab a sensor reading.  Use the read_retry method which will retry up
        # to 15 times to get a sensor reading (waiting 2 seconds between each retry).
        humidity, temperature = Adafruit_DHT.read_retry(sensor, DHTPin)

        # Note that sometimes you won't get a reading and
        # the results will be null (because Linux can't
        # guarantee the timing of calls to read the sensor).
        # If this happens try again!
        if humidity is None and temperature is None:
            humidity = "N/A"
            temperature = "N/A"
            else:
        humidity = "{0:0.1f}".format(humidity)
        temperature = "{0:0.1f}".format(temperature)

        # Write the text.

        draw.text((x, top),       "wifi: " + str(IP1),  font=font, fill=255)
        draw.text((x, top+8),     "eth0: " + str(IP2),  font=font, fill=255)
        draw.text((x, top+16),    str(CPU), font=font, fill=255)
        draw.text((x, top+24),    str(MemUsage),  font=font, fill=255)
        draw.text((x, top+32),    str(Disk),  font=font, fill=255)
        draw.text((x, top+40),    ('Temperature: {0} C'.format(temperature)),  font=font, fill=255)
        draw.text((x, top+48),    ('Humidity: {0}%'.format(humidity)),  font=font, fill=255)
        #draw.text((x, top+25),    str(Disk),  font=font, fill=255)

        # Display image.
        disp.image(image)
        disp.display()

        # Send temp and humidity to camera text overlay
        urlencoded_text = "Temp%3A%20{0}%20C%5CnHum%3A%20%20{1}%20pct".format(temperature,humidity)
        with open(os.devnull, "w") as void:
            subprocess.call(["/usr/bin/curl", "--silent", "--show-error", "http://localhost:7999/1/config/set?text_left={}".format(urlencoded_text)], stdout=void)
        time.sleep(5)

finally:
    disp.command(Adafruit_SSD1306.SSD1306_DISPLAYOFF)
    urlencoded_text = "Temp%3A%20NA%5CnHum%3A%20%20NA".format(temperature,humidity)
    with open(os.devnull, "w") as void:
        subprocess.call(["/usr/bin/curl", "--silent", "--show-error", "http://localhost:7999/1/config/set?text_left={}".format(urlencoded_text)], stdout=void)