Update README for 0.0.2

[EVA-2020-02-2.git] / examples / luftdaten.py

diff --git a/examples/luftdaten.py b/examples/luftdaten.py
index 4d3d49acd87a86dae17d79f51981f67d75fc261a..d2d656216b77143f67f5a2074b78c25465808474 100755 (executable)
--- a/examples/luftdaten.py
+++ b/examples/luftdaten.py
@@ -1,11 +1,13 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import requests
 import ST7735
+import time
 from bme280 import BME280
 from pms5003 import PMS5003, ReadTimeoutError
 from subprocess import PIPE, Popen, check_output
 from PIL import Image, ImageDraw, ImageFont
+from fonts.ttf import RobotoMedium as UserFont
 
 try:
     from smbus2 import SMBus
@@ -71,7 +73,7 @@ def read_values():
 
 # Get CPU temperature to use for compensation
 def get_cpu_temperature():
-    process = Popen(['vcgencmd', 'measure_temp'], stdout=PIPE)
+    process = Popen(['vcgencmd', 'measure_temp'], stdout=PIPE, universal_newlines=True)
     output, _error = process.communicate()
     return float(output[output.index('=') + 1:output.rindex("'")])
 
@@ -148,7 +150,7 @@ def send_to_luftdaten(values, id):
 
 
 # Compensation factor for temperature
-comp_factor = 1.2
+comp_factor = 2.25
 
 # Raspberry Pi ID to send to Luftdaten
 id = "raspi-" + get_serial_number()
@@ -159,19 +161,25 @@ HEIGHT = disp.height
 
 # Text settings
 font_size = 16
-font = ImageFont.truetype("fonts/Asap/Asap-Bold.ttf", font_size)
+font = ImageFont.truetype(UserFont, font_size)
 
 # Display Raspberry Pi serial and Wi-Fi status
 print("Raspberry Pi serial: {}".format(get_serial_number()))
 print("Wi-Fi: {}\n".format("connected" if check_wifi() else "disconnected"))
 
+time_since_update = 0
+update_time = time.time()
+
 # Main loop to read data, display, and send to Luftdaten
 while True:
     try:
+        time_since_update = time.time() - update_time
         values = read_values()
         print(values)
-        resp = send_to_luftdaten(values, id)
-        print("Response: {}\n".format("ok" if resp else "failed"))
+        if time_since_update > 145:
+            resp = send_to_luftdaten(values, id)
+            update_time = time.time()
+            print("Response: {}\n".format("ok" if resp else "failed"))
         display_status()
     except Exception as e:
         print(e)