"""
MicroPython IoT Weather Station Example for Wokwi.com

"""

import network
import time
from machine import Pin, ADC
import ujson
from umqtt.simple import MQTTClient
import math

# MQTT Server Parameters
MQTT_CLIENT_ID = "xxx_cahaya" # ganti xxx dengan nama atau inisial
MQTT_BROKER    = "broker.emqx.io" # ganti dengan broker mqtt public cloud lainnya jika ada masalah
MQTT_TOPIC1     = "pcr/xxx/cahaya"
MQTT_TOPIC2     = "pcr/xxx/jcahaya"

GAMMA = 0.7;
RL10 = 50;

sensor = ADC(Pin(34))
sensor.atten(ADC.ATTN_11DB) 

print("Connecting to WiFi", end="")
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.connect('Wokwi-GUEST', '')
while not sta_if.isconnected():
  print(".", end="")
  time.sleep(0.1)
print(" Connected!")

print("Connecting to MQTT server... ", end="")
client = MQTTClient(MQTT_CLIENT_ID, MQTT_BROKER,)
client.connect()

print("Connected!")

while True:
  print("Measuring light resistor... ")

  sensor_value = int(sensor.read() / 4)
  print(sensor_value)
  voltage = sensor_value / 1024.0 * 5.0
  resistance = 2000.0 * voltage / (1 - voltage / 5.0)
  lux = math.pow(RL10 * 1e3 * math.pow(10, GAMMA) / resistance, 1 / GAMMA)
  print(lux)
  client.publish(MQTT_TOPIC1, str(lux))
  message = ujson.dumps({
    "lux": lux,
    "isLight": True if lux >= 50 else False,
  })
  client.publish(MQTT_TOPIC2, message)

  time.sleep(5)