weatherstation.py

#sudo pip3 install adafruit-circuitpython-bme280 adafruit-circuitpython-ads1x15

import adafruit_ads1x15.ads1115 as ADS
import board
import busio
import RPi.GPIO as GPIO
import time
from adafruit_ads1x15.analog_in import AnalogIn
from adafruit_bme280 import basic as adafruit_bme280
from datetime import datetime

rainIo = 5
windIo = 6

d1125 = 0.32 #ESE
d0675 = 0.41 #ENE
d0900 = 0.45 #E
d1575 = 0.62 #SSE
d1350 = 0.90 #SE
d2025 = 1.19 #SSW
d1800 = 1.40 #S
d0225 = 1.98 #NNE
d0450 = 2.25 #NE
d2475 = 2.93 #WSW
d2250 = 3.08 #SW
d3375 = 3.43 #NNW
d0000 = 3.84 #N
d2925 = 4.04 #WNW
d3150 = 4.33 #NW
d2700 = 4.62 #W

voltages = [d0000, d0225, d0450, d0675, d0900, d1125, d1350, d1575, d1800, d2025, d2250, d2475, d2700, d2925, d3150, d3375]

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(rainIo, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(windIo, GPIO.IN, pull_up_down=GPIO.PUD_UP)

def rainClick(channel):
    print("Rain change", GPIO.input(rainIo))

def windClick(channel):
    print("Wind click", GPIO.input(windIo))

def findClosest(list, value):
    return list[min(range(len(list)), key = lambda i: abs(list[i]-value))]

GPIO.add_event_detect(rainIo, GPIO.FALLING, callback=rainClick)
GPIO.add_event_detect(windIo, GPIO.FALLING, callback=windClick)

i2c = busio.I2C(board.SCL, board.SDA)
ads = ADS.ADS1115(i2c)
ads.gain = 2/3

bme280 = adafruit_bme280.Adafruit_BME280_I2C(i2c, 118)
# change this to match the location's pressure (hPa) at sea level
bme280.sea_level_pressure = 1013.25

try:
    while True:
        temperature = bme280.temperature
        humidity = bme280.relative_humidity
        pressure = bme280.pressure * 0.02953

        if humidity is not None and temperature is not None and pressure is not None:
            temp = temperature * 1.8 + 32
            print("Temp={0:0.1f}°  Humidity={1:0.1f}%  Pressure={2:0.2f}\"HG".format(temp, humidity, pressure))
        else:
            print("Failed to retrieve data from humidity sensor")
        chan = AnalogIn(ads, ADS.P0)
        voltage = chan.voltage
        if voltage == 0:
            print("No data read from ADC")
        else:
            print("Voltage: {0:0.2f}".format(voltage))
            closest = findClosest(voltages, voltage)
            if closest == d0000:
                direction = "N"
            elif closest == d0225:
                direction = "NNE"
            elif closest == d0450:
                direction = "NE"
            elif closest == d0675:
                direction = "ENE"
            elif closest == d0900:
                direction = "E"
            elif closest == d1125:
                direction = "ESE"
            elif closest == d1350:
                direction = "SE"
            elif closest == d1575:
                direction = "SSE"
            elif closest == d1800:
                direction = "S"
            elif closest == d2025:
                direction = "SSW"
            elif closest == d2250:
                direction = "SW"
            elif closest == d2475:
                direction = "WSW"
            elif closest == d2700:
                direction = "W"
            elif closest == d2925:
                direction = "WNW"
            elif closest == d3150:
                direction = "NW"
            elif closest == d3375:
                direction = "NNW"
            else:
                direction = "unknown"
            print("Wind Direction = ", direction)
        time.sleep(1)
except KeyboardInterrupt:
    print("KeyboardInterrupt from loop")

GPIO.cleanup() # clean up GPIO on normal exit

print("Done")