barometer.py

# Modules
import logging

# Functions and variables
from var import barometer

def read_bus(file):
    f = open(file,"rt")
    value = int(f.readline())
    f.close
    return value

# A function to get temperature and humidity from the barometer.
# Frequently, the device will return an error, so the function attempts to read the values
# three times before it gives up.
def dht11_val():
    if barometer == True:
        t = h = 0
        tries = 3
        for attempt in range(tries):
            try:
                t = read_bus("/sys/bus/iio/devices/iio:device0/in_temp_input")/1000
                h = read_bus("/sys/bus/iio/devices/iio:device0/in_humidityrelative_input")/1000
            except Exception as e:
                if attempt < tries - 1:
                    logging.debug(f"Reading barometer: {e} Attempt: {attempt + 1} of {tries}")
                    continue
                else:
                    logging.info(f"Reading barometer: {e} All attempts exhausted. Giving up.")
                    t = h = "N/A"
            return t, h
    else:
        logging.info("Barometer is disabled")
        t = h = "N/A"
        return t, h 

# Currently, only the temperature is displayed by the machine, but both values are logged.
def get_barometrics():        
        (t, h) = dht11_val()
        logging.info(f"Temperature {t}°C, Humidity: {h}%")
        return t