import blynklib_mp as blynklib
import network
import utime as time
from machine import Pin

# DHT driver already included into Micropython software as core module
# so we just import it
import dht

WIFI_SSID = 'Wokwi-GUEST'
WIFI_PASS = ''
BLYNK_AUTH = 'V4-qCaMuOgKmvXth9TQ1mnJ_l0lNa73O'
GPIO_DHT22_PIN = 4

print("Connecting to WiFi network '{}'".format(WIFI_SSID))
wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect(WIFI_SSID, WIFI_PASS)
while not wifi.isconnected():
    time.sleep(1)
    print('WiFi connect retry ...')
print('WiFi IP:', wifi.ifconfig()[0])

print("Connecting to Blynk server...")
blynk = blynklib.Blynk(BLYNK_AUTH)

T_COLOR = '#f5b041'
H_COLOR = '#85c1e9'
ERR_COLOR = '#444444'

T_VPIN = 0
H_VPIN = 3

dht22 = dht.DHT22(Pin(4, Pin.IN, Pin.PULL_UP))


@blynk.handle_event('read V{}'.format(T_VPIN))
def read_handler(vpin):
    temperature = 0.0
    humidity = 0.0

    # read sensor data
    try:
        dht22.measure()
        temperature = dht22.temperature()
        humidity = dht22.humidity()
    except OSError as o_err:
        print("Unable to get DHT22 sensor data: '{}'".format(o_err))

    # change widget values and colors according read results
    if temperature != 0.0 and humidity != 0.0:
        blynk.set_property(T_VPIN, 'color', T_COLOR)
        blynk.set_property(H_VPIN, 'color', H_COLOR)
        blynk.virtual_write(T_VPIN, temperature)
        blynk.virtual_write(H_VPIN, humidity)
    else:
        # show widgets aka 'disabled' that mean we had errors during read sensor operation
        blynk.set_property(0, 'color', ERR_COLOR)
        blynk.set_property(3, 'color', ERR_COLOR)


while True:
    blynk.run()