A script that runs Playwright to open my Epson projector's web ui and clicks power button to start my projector.

start_projector.py

#!/usr/bin/env -S uv run --quiet --script
# requires installation of Playwright browsers before this script is run
# can be done with `pipx run playwright install`

# /// script
# requires-python = ">=3.12"
# dependencies = [
#    "python-dotenv",
#    "playwright",
# ]
# ///

from playwright.sync_api import sync_playwright
from dotenv import dotenv_values
import os

creds = dotenv_values(f"{os.environ.get('HOME')}/.config/.epson-creds")

assert creds.get("EPSON_USERNAME") is not None, (
    "You must define EPSON_USERNAME in $HOME/.config/.epson-creds"
)
assert creds.get("EPSON_PASSWORD") is not None, (
    "You must define EPSON_PASSWORD in $HOME/.config/.epson-creds"
)

with sync_playwright() as p:
    browser = p.firefox.launch()

    # The projector's web UI uses basic auth
    context = browser.new_context(
        http_credentials={
            "username": creds.get("EPSON_USERNAME"),
            "password": creds.get("EPSON_PASSWORD"),
        }
    )
    page = context.new_page()

    # epson.local is my /etc/hosts alias for the actual projector IP
    page.goto("http://epson.local/")

    page.locator(".basic-control").click()
    page.locator(".power").click()
    browser.close()