import socket
import time
import json
import boot
import uasyncio as asyncio
import sys

name="ESP8266relay"

def sendUDPData(host, packetType, dataToSend):
    try:
      sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  # create connection


   # sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)

    except:
      print("Cannot connect to " + host, "SocketClient.sendData")
      return False

    dataToSend = json.dumps(dataToSend)
    myip="192.168.0.100"
    datachecksum = "XXX"

    data = json.dumps({"type": packetType, "senderName": name, "sourceIP": myip, "destinationIP": host, "data": dataToSend, "checksum": datachecksum})

    sock.sendto(data.encode("utf8"), (host, 3457))
    print("send")
    await asyncio.sleep(1)
    return True

loop = asyncio.get_event_loop()
loop.create_task(sendUDPData("255.255.255.255", 2, {"request": "MAINSERVER"})) # Schedule ASAP
loop.run_forever()