Cameteo/circuitpython/main.py

# Simple weather and GPS logger

import board
from busio import I2C, UART
from time import sleep
from analogio import AnalogIn
import microcontroller
import gc
import micropython
import os

from adafruit_bme280 import Adafruit_BME280_I2C
from adafruit_gps import GPS
import neopixel

#########
# Setup #
#########

# BME280 sensors (I2C)
i2c = I2C(board.SCL, board.SDA)
bme280 = Adafruit_BME280_I2C(i2c)

# Integrated Neopixel
pixel = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.2)

# Battery voltage
vbat = AnalogIn(board.D9, )

# GPS on Feather board
gps_uart = UART(board.TX, board.RX, baudrate=9600, timeout=3000)
gps = GPS(gps_uart)
# Turn on the basic GGA and RMC info
gps.send_command('PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0')
gps.send_command('PMTK220,2000')    # 1000 ms refresh

gc.collect()
micropython.mem_info()

temp, hum, press = 0.0, 0.0, 0.0
rouge, vert, bleu = 0, 0, 0

# Check if data directory exists
if 'data' not in os.listdir():
    os.mkdir('data')
    os.mkdir('data/hourly')
    os.mkdir('data/daily')

#############
# Main loop #
#############
while True:
    sleep(5)
    
    gc.collect()
    # micropython.mem_info(1)
    # print('Memory free: {} allocated: {}'.format(gc.mem_free(), gc.mem_alloc()))
    
    temp = bme280.temperature
    hum = bme280.humidity
    press = bme280.pressure
    
    print("Temperature:   {:>+.1f} degC | Humidite: {:>.1f} % | Pression: {:>.1f} hPa".format(temp, hum, press))
    print("Tension batterie : {:>.2f} V | CPU Temp: {:>+.1f} degC".format((vbat.value*2*3.3/65536), microcontroller.cpu.temperature))
    # 0.00644531 = 2*3.3/1024 :
    #  2 : voltage is divided by 2
    #  3.3 : Vref = 3.3V
    #  1024 : 10bit ADC
    
    # Conversion des donn?es en couleur
    #  ROUGE => temp?rature : max = 35?C, min =10?C soit une amplitude de 25?C
    rouge = int((temp-10)*255/25)
    if rouge > 255:
        rouge = 255
    if rouge < 0:
        rouge = 0
    
    # BLEU => humidit? : max= 100%, mini=0%
    bleu = int(hum*255/100)
    
    # VERT => Pression : mini=960hPa, maxi = 1030hPa soit une amplitude 70hPa
    vert = int((press-960)*255/70)
    if vert > 255:
        vert = 255
    if vert < 0:
        vert = 0
    
    rvb = (rouge, vert, bleu)
    print("Couleur : {}".format(rvb))
    pixel[0] = rvb
    
    gps.update()
    if not gps.has_fix:
        # Try again if we don't have a fix yet.
        print('Waiting for fix...  {} - {}'.format(gps.has_fix, gps.satellites))
        continue
    
    print('Fix timestamp: {}/{}/{} {:02}:{:02}:{:02}'.format(
        gps.timestamp_utc.tm_mon,   # Grab parts of the time from the
        gps.timestamp_utc.tm_mday,  # struct_time object that holds
        gps.timestamp_utc.tm_year,  # the fix time.  Note you might
        gps.timestamp_utc.tm_hour,  # not get all data like year, day,
        gps.timestamp_utc.tm_min,   # month!
        gps.timestamp_utc.tm_sec))
    if gps.altitude_m is not None:
        print('Latitude: {} deg | Longitude: {} deg | Altitude: {} m'.format(gps.latitude,
                                                                             gps.longitude,
                                                                             gps.altitude_m))
    else:
        print('Latitude: {} deg | Longitude: {} deg'.format(gps.latitude, 
                                                            gps.longitude))
        
    print('Fix quality: {}'.format(gps.fix_quality))
    # Some attributes beyond latitude, longitude and timestamp are optional
    # and might not be present.  Check if they're None before trying to use!
    if gps.satellites is not None:
        print('# satellites: {}'.format(gps.satellites))
    if gps.track_angle_deg is not None:
        print('Speed: {} knots'.format(gps.speed_knots))
    if gps.track_angle_deg is not None:
        print('Track angle: {} degrees'.format(gps.track_angle_deg))
    if gps.horizontal_dilution is not None:
        print('Horizontal dilution: {}'.format(gps.horizontal_dilution))
    if gps.height_geoid is not None:
        print('Height geo ID: {} meters'.format(gps.height_geoid))