def __init__(self, sensor_pin):
"""docstring for ."""
self.sensor_pin = sensor_pin
self.spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
self.bmp_cs = digitalio.DigitalInOut(self.sensor_pin)
self.bmp280 = adafruit_bmp280.Adafruit_BMP280_SPI(
self.spi, self.bmp_cs)
self.bmp280.sea_level_pressure = 1013.25
def get_bmp280_data():
spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
cs = digitalio.DigitalInOut(board.D4)
bmp280_sensor = adafruit_bmp280.Adafruit_BMP280_SPI(spi, cs)
print("Reading temperature from BMP280")
temperature = bmp280_sensor.temperature * 1.8 + 32.0
print("Reading pressure from BMP280")
pressure = bmp280_sensor.pressure
return (temperature, pressure)
import math
import statistics
#1
alarmBuzzer = digitalio.DigitalInOut(board.D12)
alarmBuzzer.direction = digitalio.Direction.OUTPUT
alarmBuzzer.value = False
plt.style.use('ggplot')
print('set up sensors...')
spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
print('init sensor 1')
cs1 = digitalio.DigitalInOut(board.D5)
print('init sensor 2')
cs2 = digitalio.DigitalInOut(board.D6)
sensor1 = adafruit_bmp280.Adafruit_BMP280_SPI(spi, cs1)
sensor2 = adafruit_bmp280.Adafruit_BMP280_SPI(spi, cs2)
# print('test sensors')
# print('sensor1 pressure: ', sensor1.pressure)
# print('sensor2 pressure: ', sensor2.pressure)
#constants used in flow calculation
print('set up constants for flow...')
beta = 0.54545 #ratio of d/D little diameter to big diameter
beta_thing = 1.047432587 #saves recalculating
coeff = 1.0
area = 0.0001130973
rho = 1.204
time_now = 0
import time
import board
import digitalio # For use with SPI
import busio
import adafruit_bmp280
# Create library object using our Bus I2C port
# i2c = busio.I2C(board.SCL, board.SDA)
# bmp280 = adafruit_bmp280.Adafruit_BMP280_I2C(i2c)
# OR create library object using our Bus SPI port
spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
bmp_cs = digitalio.DigitalInOut(board.D5)
bmp280 = adafruit_bmp280.Adafruit_BMP280_SPI(spi, bmp_cs)
# change this to match the location's pressure (hPa) at sea level
bmp280.sea_level_pressure = 1013.25
def get_measurements():
try:
temperature = bmp280.temperature
return {
'altitude': bmp280.altitude, # meters
'pressure': bmp280.pressure, # hPa
'temperature_c': temperature,
'temperature_f': temperature * (9 / 5) + 32
}
except Exception as error: