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Unidirektionales Senden und Empfangen von UDP-Datenpaketen (NoBlocking)

Bidirektionales Senden und Empfangen von UDP-Datenpaketen (OOP, Threading, NoBlocking)

• Datenaustausch zwischen UdpClient und UdpServer
• UdpClient(Esp32) wartet (nicht blocking!) auf Daten vom UdpServer(Pc)
• UdpClient(Pc) wartet (nicht blocking!) auf Daten vom UdpServer(Esp32)

SourceCode Esp32UdpClient.py, arbeitet zusammen mit PcUdpServer.py:

#
import time
import network as NTW
import socket as SKT
#
WL_SSID = 'ssid'
WL_PW = 'pw'
#
UDP_IPADDRESS = '192.168.178.33' # '255.255.255.255' # '192.168.178.255' #'192.168.178.33'
UDP_IPPORT = 5005
#
#-----------------------------------------------------------
if ('__main__' == __name__):
    #
    print('*** UdpClient: begin')
    #
    Wlan = NTW.WLAN(NTW.STA_IF)
    Wlan.active(False)
    Wlan.active(True)
    Wlan.connect(WL_SSID, WL_PW)
    while not(Wlan.isconnected()):
        pass
    print('Wlan-IP[{0}]'.format(Wlan.ifconfig()))    
    #
    Socket = SKT.socket(SKT.AF_INET, SKT.SOCK_DGRAM)
    Socket.bind((UDP_IPADDRESS, UDP_IPPORT))
    Socket.setblocking(0)
    Loop = True
    while (Loop):
        try:       
            Data, Address = Socket.recvfrom(1024)
            if (b'Q' == Data):
                Loop = False
        except SKT.error:
            pass 
        else:
            print(Data)
        finally:
            # debug print('-')
            time.sleep(0.1)
    Socket.close()
    #
    print('*** UdpClient: end')
    #

SourceCode Esp32UdpServer.py, arbeitet zusammen mit PcUdpClient.py:

#
import time
import network as NTW
import socket as SKT
#
WL_SSID = 'ssid'
WL_PW = 'pw'
#
UDP_IPADDRESS = '192.168.178.255' # '255.255.255.255' # '192.168.178.255' #'192.168.178.33'
UDP_IPPORT = 5005
#
#-----------------------------------------------------------
if ('__main__' == __name__):
    #
    print('*** UdpServer: begin')
    #
    Wlan = NTW.WLAN(NTW.STA_IF)
    Wlan.active(False)
    Wlan.active(True)
    Wlan.connect(WL_SSID, WL_PW)
    while not(Wlan.isconnected()):
        pass
    print('Wlan-IP[{0}]'.format(Wlan.ifconfig()))    
    #
    Socket = SKT.socket(SKT.AF_INET, SKT.SOCK_DGRAM)
    for I in range(0, 10):
        print('.')
        Socket.sendto(b'Hello', (UDP_IPADDRESS, UDP_IPPORT))
        time.sleep(1.0)
    #
    Socket.sendto(b'Q', (UDP_IPADDRESS, UDP_IPPORT))
    Socket.close()
    print('*** UdpServer: end')
    #

Ausgabe in Terminal: