python-escpos/examples/weather.py

#!/usr/bin/python


# Adapted script from Adafruit
# Weather forecast for Raspberry Pi w/Adafruit Mini Thermal Printer.
# Retrieves data from DarkSky.net's API, prints current conditions and
# forecasts for next two days.
# Weather example using nice bitmaps.
# Written by Adafruit Industries.  MIT license.
# Adapted and enhanced for escpos library by MrWunderbar666

# Icons taken from https://adamwhitcroft.com/climacons/
# Check out his github: https://github.com/AdamWhitcroft/climacons


from datetime import datetime
import calendar
import urllib
import json
import time
import os

from escpos.printer import Usb

""" Setting up the main pathing """
this_dir, this_filename = os.path.split(__file__)
GRAPHICS_PATH = os.path.join(this_dir, "graphics/climacons/")

# Adapt to your needs
printer = Usb(0x0416, 0x5011, profile="POS-5890")

# You can get your API Key on www.darksky.net and register a dev account.
# Technically you can use any other weather service, of course :)
API_KEY = "YOUR API KEY"

LAT = "22.345490"  # Your Location
LONG = "114.189945"  # Your Location


def forecast_icon(idx):
    icon = data["daily"]["data"][idx]["icon"]
    image = GRAPHICS_PATH + icon + ".png"
    return image


# Dumps one forecast line to the printer
def forecast(idx):
    date = datetime.fromtimestamp(int(data["daily"]["data"][idx]["time"]))
    day = calendar.day_name[date.weekday()]
    lo = data["daily"]["data"][idx]["temperatureMin"]
    hi = data["daily"]["data"][idx]["temperatureMax"]
    cond = data["daily"]["data"][idx]["summary"]
    print(date)
    print(day)
    print(lo)
    print(hi)
    print(cond)
    time.sleep(1)
    printer.set(font="a", height=2, align="left", bold=False, double_height=False)
    printer.text(day + " \n ")
    time.sleep(5)  # Sleep to prevent printer buffer overflow
    printer.text("\n")
    printer.image(forecast_icon(idx))
    printer.text("low " + str(lo))
    printer.text(deg)
    printer.text("\n")
    printer.text(" high " + str(hi))
    printer.text(deg)
    printer.text("\n")
    # take care of pesky unicode dash
    printer.text(cond.replace("\u2013", "-").encode("utf-8"))
    printer.text("\n \n")


def icon():
    icon = data["currently"]["icon"]
    image = GRAPHICS_PATH + icon + ".png"
    return image


deg = " C"  # Degree symbol on thermal printer, need to find a better way to use a proper degree symbol

# if you want Fahrenheit change units= to 'us'
url = (
    "https://api.darksky.net/forecast/"
    + API_KEY
    + "/"
    + LAT
    + ","
    + LONG
    + "?exclude=[alerts,minutely,hourly,flags]&units=si"
)  # change last bit to 'us' for Fahrenheit
response = urllib.urlopen(url)
data = json.loads(response.read())

printer.print_and_feed(n=1)
printer.control("LF")
printer.set(font="a", height=2, align="center", bold=True, double_height=True)
printer.text("Weather Forecast")
printer.text("\n")
printer.set(align="center")


# Print current conditions
printer.set(font="a", height=2, align="center", bold=True, double_height=False)
printer.text("Current conditions: \n")
printer.image(icon())
printer.text("\n")

printer.set(font="a", height=2, align="left", bold=False, double_height=False)
temp = data["currently"]["temperature"]
cond = data["currently"]["summary"]
printer.text(temp)
printer.text(" ")
printer.text(deg)
printer.text(" ")
printer.text("\n")
printer.text("Sky: " + cond)
printer.text("\n")
printer.text("\n")

# Print forecast
printer.set(font="a", height=2, align="center", bold=True, double_height=False)
printer.text("Forecast: \n")
forecast(0)
forecast(1)
printer.cut()
printer.control("LF")