import socket
from machine import Pin, ADC
from utime import sleep_ms
import os

while not wlan.isconnected():
    sleep_ms(100)

adc = ADC(0)
forward = Pin(16, Pin.IN)
backward = Pin(4, Pin.IN)
calibration = adc.read()

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # UDP
sock.bind(("", 37020))

while True:
    try:
        sockaddr = socket.getaddrinfo('sumo-%s' % config["remote-id"], 44444)[0][-1]
    except OSError:
        sleep_ms(500)
    else:
        break

#    sockaddr = "192.168.1.255", 44444

while True:
    msg = "%d:%d:%d" % (adc.read()-calibration, not forward.value(), not backward.value())
    sock.sendto(msg.encode("ascii"), sockaddr)
    sleep_ms(30)