Minor improvements

examples/weather.py

@@ -5,17 +5,13 @@
 # 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.
+# Weather example using nice bitmaps.
 # Written by Adafruit Industries.  MIT license.
-# 
+# Adapted and enhanced for escpos library by MrWunderbar666
-# Required software includes Adafruit_Thermal and PySerial libraries.
-# Other libraries used are part of stock Python install.
-# 
-# Resources:
-# http://www.adafruit.com/products/597 Mini Thermal Receipt Printer
-# http://www.adafruit.com/products/600 Printer starter pack
 
 # Icons taken from http://adamwhitcroft.com/climacons/
+# Check out his github: https://github.com/AdamWhitcroft/climacons
+
 
 from __future__ import print_function
 from datetime import date
@@ -29,42 +25,22 @@ from escpos.printer import Usb
 # 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
+LAT = "22.345490"       # Your Location
-LONG = "114.189945" # Your Location
+LONG = "114.189945"     # Your Location
 
 def forecast_icon(idx):
     icon = data['daily']['data'][idx]['icon']
-    if 'clear-day' in icon:
+    image = "/graphics/" + icon + ".png"
-        image = 'clear-day.png'
-    elif 'clear-night' in icon:
-        image = 'clear-night.png'
-    elif 'partly-cloudy-day' in icon:
-        image = 'partly-cloudy-day.png'
-    elif 'partly-cloudy-night' in icon:
-        image = 'partly-cloudy-night.png'
-    elif 'rain' in icon:
-        image = 'rain.png'
-    elif 'snow' in icon:
-        image = 'snow.png'      
-    elif 'sleet' in icon:
-        image = 'sleet.png'    
-    elif 'wind' in icon:
-        image = 'wind.png'
-    elif 'fog' in icon:
-        image = 'fog.png'        
-    elif 'cloudy' in icon:
-        image = 'cloudy.png'
-    else:
-        image = 'clear-day.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']
@@ -77,7 +53,7 @@ def forecast(idx):
     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
+    time.sleep(5)           # Sleep to prevent printer buffer overflow
     printer.text('\n')
     printer.image(forecast_icon(idx), high_density_vertical=False, high_density_horizontal=False, impl=u'bitImageRaster', fragment_height=960)
     printer.text('low ' + str(lo) )    
@@ -89,36 +65,17 @@ def forecast(idx):
     printer.text(cond.replace(u'\u2013', '-').encode('utf-8')) # take care of pesky unicode dash
     printer.text('\n \n') 
 
+
 def icon():
     icon = data['currently']['icon']
-    if 'clear-day' in icon:
+    image = "/graphics/" + icon + ".png"
-        image = 'clear-day.png'
-    elif 'clear-night' in icon:
-        image = 'clear-night.png'
-    elif 'partly-cloudy-day' in icon:
-        image = 'partly-cloudy-day.png'
-    elif 'partly-cloudy-night' in icon:
-        image = 'partly-cloudy-night.png'
-    elif 'rain' in icon:
-        image = 'rain.png'
-    elif 'snow' in icon:
-        image = 'snow.png'      
-    elif 'sleet' in icon:
-        image = 'sleet.png'    
-    elif 'wind' in icon:
-        image = 'wind.png'
-    elif 'fog' in icon:
-        image = 'fog.png'        
-    elif 'cloudy' in icon:
-        image = 'cloudy.png'
-    else:
-        image = 'clear-day.png'
     return image
 
 
-deg     = ' C' # Degree symbol on thermal printer
+deg     = ' C'      # Degree symbol on thermal printer, need to find a better way to use a proper degree symbol
 
-url = "https://api.darksky.net/forecast/"+API_KEY+"/"+LAT+","+LONG+"?exclude=[alerts,minutely,hourly,flags]&units=si" # if you want Fahrenheit change units= to 'us'
+# 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"
 response = urllib.urlopen(url)
 data = json.loads(response.read())
 
@@ -128,17 +85,14 @@ 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']
@@ -149,13 +103,11 @@ 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')
-#printer.boldOff()
 forecast(0)
 forecast(1)
 printer.cut