UDP sockets doesnt' work

[p.m.97]

Hi,

There is some code example that implements WIFI-Direct using UDP?

Recevier

        wlan =WLAN()

        Pin('P12', mode=Pin.OUT)(True)
        wlan.init(mode=WLAN.AP, ssid= Name, auth=(WLAN.WPA2,Pass), channel=1, antenna=WLAN.EXT_ANT)
        s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)  #create  socket server
        s.bind(('192.168.4.1',2000))  #bind
        s.settimeout(3)
        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        while True:
           try:
            data, address = sock.recvfrom(1024)
            print ("Received data from", address)
            print(data)
            ack = bytes("ACK",'utf-8')
            s.sendto(ack,('192.168.4.2', 58308))  #invia l'ack
           except OSError:
                   return ("Timeout")
        

Sender

    Pin('P12', mode=Pin.OUT)(True)
    wlan = WLAN()
    wlan.init(mode = WLAN.STA, antenna = WLAN.EXT_ANT) #station
    wlan.ifconfig(config=('192.168.0.107', '255.255.255.0', '192.168.0.1', '192.168.0.1'))
    nets = wlan.scan()


    for net in nets:
        if net.ssid == ssid:
            print("Found network: " + net.ssid)
            wlan.connect(net.ssid, auth=(net.sec, password), timeout=5000) 

            while not wlan.isconnected():
                idle() # save energy
            if wlan.isconnected() == True:
                    print('WLAN connection succeeded!')
    data = "Hello"
    s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)  #crea  socket server
    s.bind('192.168.0.107',58308)
    s.settimeout(3)
    s.sendto(data,('192.168.4.1',2000))   #send bytes
    print("Waiting for the data")

    while True:
     try:

        result, address = s.recvfrom(1024)
        print(address)
        if address == ('192.168.4.1',2000):
            print(result)
            return result
        else:
            return -1

     except OSError:

        print ("Timeout")
        return "Timeout"

But the sockets doesn't exchange data, what is wrong?
(obviously all the necessary modules have been imported)

[p.m.97]

@tvetter1976

Hi,

I've added the timeout to make the recvfrom non-blocking.Moreover, all the operation does not depend by the s.bind() (for safety I tried to remove it anyway, and in fact it still doesn't work)
Other advice?

Thank you

[tvetter1976]

@p-m-97
For the sender, this should be enough for sending data (bind and timeout is not needed for UDP as far as I understood):

UDP_IP = '192.168.4.1'
UDP_PORT = 2000
MESSAGE = "Hello, World!".encode()
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
addr=(UDP_IP,UDP_PORT)
s.sendto(MESSAGE,addr)