how many planes? roughly based on sample code from adafruit's library for talking to the oled hat

adsbstats.py

import time
import subprocess

from board import SCL, SDA
import busio
from PIL import Image, ImageDraw, ImageFont
import adafruit_ssd1305

import urllib.request, json
import sys
import datetime

# Create the I2C interface.
i2c = busio.I2C(SCL, SDA)

# Create the SSD1305 OLED class.
# The first two parameters are the pixel width and pixel height.  Change these
# to the right size for your display!
disp = adafruit_ssd1305.SSD1305_I2C(128, 32, i2c)

# Clear display.
disp.fill(0)
disp.show()

# 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 = 0
top = padding
bottom = height - padding
# Move left to right keeping track of the current x position for drawing shapes.
x = 1


# Load default font.
# font = ImageFont.load_default()
font = ImageFont.truetype('./fonts/5x7-coders-crux.ttf', 16)

while True:

    # Grab data
    url = "http://localhost:80/tar1090/data/aircraft.json"
    response = urllib.request.urlopen(url)
    data = json.load(response)
    planes = data["aircraft"]
    aircraftResult = "{count} aircraft".format(count=len(planes))


    # Clear the image.
    draw.rectangle((0, 0, width, height), outline=0, fill=0)

    lineOne = '{0:%Y-%m-%d %H:%M:%S}'.format(datetime.datetime.now())
    lineTwo = ""
    lineThree = aircraftResult

    draw.text((x, top + 1), lineOne, font=font, fill=255)
    draw.text((x, top + 13), lineTwo, font=font, fill=255)
    draw.text((x, top + 25), lineThree, font=font, fill=255)

    # Display image.
    disp.image(image)
    disp.show()
    time.sleep(0.1)