kopia lustrzana https://github.com/micropython/micropython
Merge 7d1f95001d into 5114f2c1ea
Ihor Nehrutsa
GitHub
commit
f319671851
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@ -162,6 +162,11 @@ These are working configurations for LAN interfaces of popular boards::
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lan = network.LAN(id=0, mdc=Pin(23), mdio=Pin(18), power=Pin(5),
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phy_type=network.PHY_IP101, phy_addr=1)
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UDP MULTICAST
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^^^^^^^^^^^^^
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See client/server example in the :ref:`esp32_udp_multicast` tutorial.
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Delay and timing
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----------------
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@ -16,8 +16,8 @@ to `<https://www.python.org>`__.
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.. toctree::
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:maxdepth: 1
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:numbered:
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intro.rst
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pwm.rst
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peripheral_access.rst
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udp_multicast.rst
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@ -0,0 +1,27 @@
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.. _esp32_udp_multicast:
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UDP MULTICAST
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=============
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Use UDP MULTICAST connections to communicate between two devices in different networks
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with IP-addresses 172.16.55.55 and 192.168.44.44.
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Run `udp_multicast_client.py <https://github.com/micropython/micropython/blob/master/examples/network/udp_multicast_client.py>`_ on one device.
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Client send GET and receive ACK from the server.
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Output is::
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GET to ('224.0.0.111', 5555) sent "client_ip:172.16.55.55 mac:b8-d6-1a-5a-c2-e4"
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ACK from ('192.168.44.44', 5555) received "server_ip:192.168.44.44 mac:24-6f-28-7a-f3-9c"
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GET to ('224.0.0.111', 5555) sent "client_ip:172.16.55.55 mac:b8-d6-1a-5a-c2-e4"
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ACK from ('192.168.44.44', 5555) received "server_ip:192.168.44.44 mac:24-6f-28-7a-f3-9c"
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...
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Run `udp_multicast_server.py <https://github.com/micropython/micropython/blob/master/examples/network/udp_multicast_server.py>`_ on another device.
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Server receive GET and send ACK to the client.
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Output is::
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GET from ('172.16.55.55', 5555) received "client_ip:172.16.55.55 mac:b8-d6-1a-5a-c2-e4"
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ACK to ('224.0.0.111', 5555) sent "server_ip:192.168.44.44 mac:24-6f-28-7a-f3-9c"
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GET from ('172.16.55.55', 5555) received "client_ip:172.16.55.55 mac:b8-d6-1a-5a-c2-e4"
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ACK to ('224.0.0.111', 5555) sent "server_ip:192.168.44.44 mac:24-6f-28-7a-f3-9c"
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...
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@ -0,0 +1,70 @@
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# udp_multicast_client.py::
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import network, socket, errno, struct, time
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print("connect to AP")
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SSID = "SSID"
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PASSWORD = "PASSWORD"
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wlan = network.WLAN(network.STA_IF)
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# class B network
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wlan.ifconfig(("172.16.55.55", "255.255.255.0", "172.16.55.1", "172.16.55.1"))
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wlan.active(True)
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wlan.connect(SSID, PASSWORD)
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while not wlan.isconnected():
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pass
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print("udp_multicast_client.py")
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print("client send GET and receive ACK from the server")
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def inet_aton(str_addr):
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return bytes(map(int, str_addr.split(".")))
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# TIMEOUT = None # block
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# TIMEOUT = 5 # seconds
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TIMEOUT = 0 # non blocking
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MULTICAST_IP = "224.0.0.111"
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PORT = 5555
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sockaddr = (MULTICAST_IP, PORT)
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wlan = network.WLAN(network.STA_IF)
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client_ip = wlan.ifconfig()[0]
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skt = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # UDP
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skt.settimeout(None)
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skt.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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skt.setsockopt(
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socket.IPPROTO_IP,
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socket.IP_ADD_MEMBERSHIP,
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struct.pack(">4s4s", inet_aton(MULTICAST_IP), inet_aton(client_ip)),
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) # join to the multicast address
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skt.bind(sockaddr) # not skt.connect(sockaddr)
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skt.settimeout(TIMEOUT)
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t = 0
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while True:
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try:
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if time.time() - t >= 3:
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t = time.time()
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mac = wlan.config("mac")
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str_to_send = f"client_ip:{client_ip}\t mac:{'-'.join(map('{:02x}'.format, mac))}"
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skt.sendto(str_to_send, sockaddr)
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print(f'GET to {sockaddr}\t sent "{str_to_send}"')
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received, addr = skt.recvfrom(1024)
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if received:
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print(f'ACK from {addr}\t received "{received.decode()}"')
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except OSError as e:
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if e.args[0] in (errno.EAGAIN, errno.ETIMEDOUT):
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pass
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else:
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try:
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skt.close()
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except:
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pass
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raise (e)
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@ -0,0 +1,66 @@
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# udp_multicast_server.py::
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import network, socket, errno, struct, time
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print("connect to AP")
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SSID = "SSID"
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PASSWORD = "PASSWORD"
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wlan = network.WLAN(network.STA_IF)
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# class C network
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wlan.ifconfig(("192.168.44.44", "255.255.255.0", "192.168.44.1", "192.168.44.1"))
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wlan.active(True)
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wlan.connect(SSID, PASSWORD)
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while not wlan.isconnected():
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pass
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print("udp_multicast_server.py")
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print("server receive GET and send ACK to the client")
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def inet_aton(str_addr):
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return bytes(map(int, str_addr.split(".")))
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# TIMEOUT = None # block
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# TIMEOUT = 5 # seconds
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TIMEOUT = 0 # non blocking
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MULTICAST_IP = "224.0.0.111"
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PORT = 5555
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sockaddr = (MULTICAST_IP, PORT)
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wlan = network.WLAN(network.STA_IF)
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server_ip = wlan.ifconfig()[0]
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skt = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # UDP
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skt.settimeout(None)
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skt.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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skt.setsockopt(
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socket.IPPROTO_IP,
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socket.IP_ADD_MEMBERSHIP,
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struct.pack(">4s4s", inet_aton(MULTICAST_IP), inet_aton(server_ip)),
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) # join to the multicast address
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skt.bind(sockaddr)
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skt.settimeout(TIMEOUT)
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while True:
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try:
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received, addr = skt.recvfrom(1024)
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if received:
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print(f'GET from {addr}\t received "{received.decode()}"')
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mac = wlan.config("mac")
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str_to_send = f"server_ip:{server_ip}\t mac:{'-'.join(map('{:02x}'.format, mac))}"
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skt.sendto(str_to_send, sockaddr)
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print(f'ACK to {sockaddr}\t sent "{str_to_send}"')
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except OSError as e:
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if e.args[0] in (errno.EAGAIN, errno.ETIMEDOUT):
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pass
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else:
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try:
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skt.close()
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except:
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pass
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raise (e)
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