X-Git-Url: https://zdv2.bktei.com/gitweb/EVA-2020-02-2.git/blobdiff_plain/b17f34b42aa5e6ca959d8f3d748012c87d4d8999..0c5c9465f1a8cecddbeb654b6dbacaedc4ba0e39:/examples/luftdaten.py diff --git a/examples/luftdaten.py b/examples/luftdaten.py index 2177a56..84f1117 100755 --- a/examples/luftdaten.py +++ b/examples/luftdaten.py @@ -1,25 +1,28 @@ -#!/usr/bin/env python +#!/usr/bin/env python3 -import time -import json import requests import ST7735 +import time from bme280 import BME280 -from pms5003 import PMS5003 +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 except ImportError: from smbus import SMBus -print("""luftdaten.py - Reads temperature, pressure, humidity, PM2.5, and PM10 from -Enviro plus and sends data to Luftdaten, the citizen science air quality project. +print("""luftdaten.py - Reads temperature, pressure, humidity, +PM2.5, and PM10 from Enviro plus and sends data to Luftdaten, +the citizen science air quality project. -Note: you'll need to register with Luftdaten at: https://meine.luftdaten.info/ and -enter your Raspberry Pi serial number that's displayed on the Enviro plus LCD -along with the other details before the data appears on the Luftdaten map. +Note: you'll need to register with Luftdaten at: +https://meine.luftdaten.info/ and enter your Raspberry Pi +serial number that's displayed on the Enviro plus LCD along +with the other details before the data appears on the +Luftdaten map. Press Ctrl+C to exit! @@ -30,9 +33,6 @@ bus = SMBus(1) # Create BME280 instance bme280 = BME280(i2c_dev=bus) -# Create PMS5003 instance -pms5003 = PMS5003() - # Create LCD instance disp = ST7735.ST7735( port=0, @@ -46,6 +46,10 @@ disp = ST7735.ST7735( # Initialize display disp.begin() +# Create PMS5003 instance +pms5003 = PMS5003() + + # Read values from BME280 and PMS5003 and return as dict def read_values(): values = {} @@ -55,23 +59,32 @@ def read_values(): values["temperature"] = "{:.2f}".format(comp_temp) values["pressure"] = "{:.2f}".format(bme280.get_pressure() * 100) values["humidity"] = "{:.2f}".format(bme280.get_humidity()) - pm_values = pms5003.read() - values["P2"] = str(pm_values.pm_ug_per_m3(2.5)) - values["P1"] = str(pm_values.pm_ug_per_m3(10)) + try: + pm_values = pms5003.read() + values["P2"] = str(pm_values.pm_ug_per_m3(2.5)) + values["P1"] = str(pm_values.pm_ug_per_m3(10)) + except ReadTimeoutError: + pms5003.reset() + pm_values = pms5003.read() + values["P2"] = str(pm_values.pm_ug_per_m3(2.5)) + values["P1"] = str(pm_values.pm_ug_per_m3(10)) return 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("'")]) + # Get Raspberry Pi serial number to use as ID def get_serial_number(): - with open('/proc/cpuinfo','r') as f: + with open('/proc/cpuinfo', 'r') as f: for line in f: - if line[0:6]=='Serial': - return(line.split(":")[1].strip()) + if line[0:6] == 'Serial': + return line.split(":")[1].strip() + # Check for Wi-Fi connection def check_wifi(): @@ -80,6 +93,7 @@ def check_wifi(): else: return False + # Display Raspberry Pi serial and Wi-Fi status on LCD def display_status(): wifi_status = "connected" if check_wifi() else "disconnected" @@ -96,30 +110,36 @@ def display_status(): draw.text((x, y), message, font=font, fill=text_colour) disp.display(img) + def send_to_luftdaten(values, id): pm_values = dict(i for i in values.items() if i[0].startswith("P")) temp_values = dict(i for i in values.items() if not i[0].startswith("P")) - resp_1 = requests.post("https://api.luftdaten.info/v1/push-sensor-data/", + pm_values_json = [{"value_type": key, "value": val} for key, val in pm_values.items()] + temp_values_json = [{"value_type": key, "value": val} for key, val in temp_values.items()] + + resp_1 = requests.post( + "https://api.luftdaten.info/v1/push-sensor-data/", json={ "software_version": "enviro-plus 0.0.1", - "sensordatavalues": [{"value_type": key, "value": val} for key, val in pm_values.items()] + "sensordatavalues": pm_values_json }, headers={ - "X-PIN": "1", + "X-PIN": "1", "X-Sensor": id, "Content-Type": "application/json", "cache-control": "no-cache" } ) - resp_2 = requests.post("https://api.luftdaten.info/v1/push-sensor-data/", + resp_2 = requests.post( + "https://api.luftdaten.info/v1/push-sensor-data/", json={ "software_version": "enviro-plus 0.0.1", - "sensordatavalues": [{"value_type": key, "value": val} for key, val in temp_values.items()] + "sensordatavalues": temp_values_json }, headers={ - "X-PIN": "11", + "X-PIN": "11", "X-Sensor": id, "Content-Type": "application/json", "cache-control": "no-cache" @@ -131,8 +151,9 @@ def send_to_luftdaten(values, id): else: return False + # Compensation factor for temperature -comp_factor = 1.2 +comp_factor = 2.25 # Raspberry Pi ID to send to Luftdaten id = "raspi-" + get_serial_number() @@ -143,19 +164,25 @@ 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)