python-escpos/examples/weather.py

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#!/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 http://adamwhitcroft.com/climacons/
# Check out his github: https://github.com/AdamWhitcroft/climacons
from __future__ import print_function
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__)
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GRAPHICS_PATH = os.path.join(this_dir, 'graphics/climacons/')
# Adapt to your needs
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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 :)
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API_KEY = 'YOUR API KEY'
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LAT = '22.345490' # Your Location
LONG = '114.189945' # Your Location
def forecast_icon(idx):
icon = data['daily']['data'][idx]['icon']
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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(u'\u2013', '-').encode('utf-8'))
printer.text('\n \n')
def icon():
icon = data['currently']['icon']
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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'
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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)
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printer.control('LF')
printer.set(font='a', height=2, align='center', bold=True, double_height=True)
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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())
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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)
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printer.cut()
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printer.control('LF')