print("Hello, ESP32!")
"""
MicroPython MQTT NeoPixels Example for Wokwi.com

To control the pixels:

1. Go to http://www.hivemq.com/demos/websocket-client/
2. Click "Connect"
3. Under Publish, set the Topic to "mkz/home/kitchen/light/state"
4. in the Message field type [255, 0, 0] (or any other color RGB value)
5. click "Publish"
6. Open MIT App Inverter. Run MQTTKitchenLight
7. Download Android Apps : https://play.google.com/store/apps/details?id=edu.mit.appinventor.aicompanion3&hl=en-MY

Copyright (C) 2022, Uri Shaked

https://wokwi.com/arduino/projects/315787266233467457
"""

import network
import ujson
from neopixel import NeoPixel
from machine import Pin
from time import sleep
from umqtt.simple import MQTTClient

from utime import sleep_ms # "utime" is an optimized subset version of the CPython time module


pixels = NeoPixel(Pin(13), 16)
pixels.fill((0, 0, 0))
pixels.write()

led = Pin(2, Pin.OUT)    # create output pin on GPIO2

def mqtt_message(topic, msg):
  print("Incoming message:", msg)
  try:
    msg = ujson.loads(msg)
    pixels.fill((msg[0], msg[1], msg[2]))
    pixels.write()

    if msg[3] == 0:
    #if msg == b'off':
        led.value(0)
        print('LED is now OFF')
    elif msg[3] == 1:
    #elif msg == b'on':
        led.value(1)
        print('LED is now ON')



  except Exception as e:
    print("Error:", e)

print("Connecting to WiFi...", end="")
import network
wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect("Wokwi-GUEST", "")
while not wifi.isconnected():
  sleep(0.5)
  print(".", end="")
print("Done")

print("Connecting to MQTT...")
client = MQTTClient("wokwi1", "broker.hivemq.com")
client.set_callback(mqtt_message)
client.connect()
client.subscribe("mkz/home/kitchen/light/state")
print("Connected!")

while True:
  client.wait_msg()