import machine
import time
import network
from umqtt.simple import MQTTClient

ledR = machine.Pin(25,machine.Pin.OUT)
ledG = machine.Pin(26,machine.Pin.OUT)
ledV = machine.Pin(27,machine.Pin.OUT)
adc = machine.ADC(machine.Pin(32),atten=machine.ADC.ATTN_11DB)

SSID = 'dd-wrt'
PASSWD = '123456789'

sta_if = network.WLAN(network.STA_IF)
print('connecting to network...')
sta_if.active(True)
sta_if.connect(SSID, PASSWD)
while not sta_if.isconnected():
    pass
print('network config:', sta_if.ifconfig())

SERVER = '172.22.5.222' # Modificare con indirizzo Broker
CLIENT_ID = 'ESP32' # Nome dispositivo
TOPIC = 'POT' # Topic

client = MQTTClient(CLIENT_ID,SERVER,1883,keepalive=60)
client.connect()

msg_prec = ""

while True:
    pot = adc.read()

    if pot<4096/3:
        msg = "MIN"
        ledV.on()
        ledG.off()
        ledR.off()
    elif pot<4096*2/3:
        msg = "MED"
        ledV.off()
        ledG.on()
        ledR.off()
    else:
        msg = "MAX"
        ledV.off()
        ledG.off()
        ledR.on()

    if msg != msg_prec:
        client.publish(TOPIC,msg)
        msg_prec = msg

    print(msg+" POT="+str(pot))
    #time.sleep(1)