Example plug-in Pi Zero display script for Adafruit 128x32 OLED Bonnet plus reading Initial State API data

runoled.py

import time
import subprocess
from board import SCL, SDA, D4
import busio
import digitalio
from PIL import Image, ImageDraw, ImageFont
import adafruit_ssd1305
import subprocess
from ISReader.Reader import Reader

# --------- User Settings ---------
SECONDS_BETWEEN_SCREENS = 5
BUCKET_KEY = "PLACE YOUR INITIAL STATE BUCKET KEY HERE"
ACCESS_KEY = "PLACE YOUR INITIAL STATE ACCESS KEY HERE"
STREAM_KEY1_TEMP = "crawl2 Temperature(F)"
STREAM_KEY1_HUM = "crawl2Humidity(%)"
STREAM_KEY2_TEMP = "attic Temperature(F)"
STREAM_KEY2_HUM = "atticHumidity(%)"
STREAM_KEY3_TEMP = "curr_temp"
STREAM_KEY3_HUM = "curr_humidity"
# ---------------------------------

# ------------- Set up OLED ------------- 
oled_reset = digitalio.DigitalInOut(D4)
i2c = busio.I2C(SCL, SDA)
disp = adafruit_ssd1305.SSD1305_I2C(128, 32, i2c, reset=oled_reset)
disp.fill(0)
disp.show()
width = disp.width
height = disp.height
image = Image.new("1", (width, height))
draw = ImageDraw.Draw(image)
draw.rectangle((0, 0, width, height), outline=0, fill=0)
padding = -2
top = padding
bottom = height - padding
x = 0
font = ImageFont.load_default()
# ---------------------------------------

# create Initial State Reader instance
reader = Reader(access_key=ACCESS_KEY, bucket_key=BUCKET_KEY)
seconds_between_reads = 0

# Insert boot delay to ensure network connection
time.sleep(30)

while True:

    # Get IP address
    ipaddr = subprocess.check_output(['hostname', '-I']).decode("utf-8").rstrip()

    # Read data value from Initial State API 
    if seconds_between_reads <= 0:
        try:
            events = reader.get_latest()
        except:
            print("Attempt to access Initial State Read API failed. Retrying ...")
        seconds_between_reads = 60 # Set number of seconds between API reads

    # --- Draw a black filled box to clear the image then write first screen ---
    draw.rectangle((0, 0, width, height), outline=0, fill=0)
    draw.text((x, top + 0), "Crawlspace: ", font=font, fill=255)
    if (not events or STREAM_KEY1_TEMP not in events):
        draw.text((x, top + 8), "  " + "Unknown Temperature", font=font, fill=255)
    else:
        draw.text((x, top + 8), "  " + events[STREAM_KEY1_TEMP]['value'] + " °F", font=font, fill=255)
    if (not events or STREAM_KEY1_HUM not in events):
        draw.text((x, top + 16), "  " + "Unknown Humidity", font=font, fill=255)
    else:
        draw.text((x, top + 16), "  " + events[STREAM_KEY1_HUM]['value'] + "% humidity", font=font, fill=255)
    disp.image(image)
    disp.show()
    time.sleep(SECONDS_BETWEEN_SCREENS)
    seconds_between_reads -= SECONDS_BETWEEN_SCREENS
    # --------------------------------------------------------------------------

    # --- Draw a black filled box to clear the image then write second screen ---
    draw.rectangle((0, 0, width, height), outline=0, fill=0)
    draw.text((x, top + 0), "Attic: ", font=font, fill=255)
    if (not events or STREAM_KEY2_TEMP not in events):
        draw.text((x, top + 8), "  " + "Unknown Temperature", font=font, fill=255)
    else:
        draw.text((x, top + 8), "  " + events[STREAM_KEY2_TEMP]['value'] + " °F", font=font, fill=255)
    if (not events or STREAM_KEY2_HUM not in events):
        draw.text((x, top + 16), "  " + "Unknown Humidity", font=font, fill=255)
    else:
        draw.text((x, top + 16), "  " + events[STREAM_KEY2_HUM]['value'] + "% humidity", font=font, fill=255)
    disp.image(image)
    disp.show()
    time.sleep(SECONDS_BETWEEN_SCREENS)
    seconds_between_reads -= SECONDS_BETWEEN_SCREENS
    # ---------------------------------------------------------------------------

    # --- Draw a black filled box to clear the image then write third screen ---
    draw.rectangle((0, 0, width, height), outline=0, fill=0)
    draw.text((x, top + 0), "Outside: ", font=font, fill=255)
    if (not events or STREAM_KEY3_TEMP not in events):
        draw.text((x, top + 8), "  " + "Unknown Temperature", font=font, fill=255)
    else:
        draw.text((x, top + 8), "  " + events[STREAM_KEY3_TEMP]['value'] + " °F", font=font, fill=255)
    if (not events or STREAM_KEY3_HUM not in events):
        draw.text((x, top + 16), "  " + "Unknown Humidity", font=font, fill=255)
    else:
        draw.text((x, top + 16), "  " + events[STREAM_KEY3_HUM]['value'] + "% humidity", font=font, fill=255)
    disp.image(image)
    disp.show()
    time.sleep(SECONDS_BETWEEN_SCREENS)
    seconds_between_reads -= SECONDS_BETWEEN_SCREENS
    # --------------------------------------------------------------------------

    # --- Draw a black filled box to clear the image then write fourth screen ---
    draw.rectangle((0, 0, width, height), outline=0, fill=0)
    draw.text((x, top + 25), "IP: " + ipaddr, font=font, fill=255)
    disp.image(image)
    disp.show()
    time.sleep(SECONDS_BETWEEN_SCREENS/4)
    seconds_between_reads -= SECONDS_BETWEEN_SCREENS
    # ---------------------------------------------------------------------------