安信可 UDP multicast示例

UDP multicast Example

Configuration project

By default, the connected wifi AP in this project is ssid=”ssid” and password=”password”. You need to modify it according to your own AP configuration.

#define ROUTER_SSID "ssid"
#define ROUTER_PWD "password"

Multicast default configuration

  • Muliticast addr: 224.0.1.0

  • Port: 7878

You can go to the main The macro definition in c modifies the IP address and port number of multicast

build and download

Compile with instructions and download firmware.

make -j16 flash p=/dev/ttyUSB0 b=921600

j16 is the number of cores in the system

Example Output

When the client connects, it will send a “shell udp server” to the server and start listening for messages.

Multicast started successfully
(other log)...
[WF][SM] Exiting connecting state
[WF][SM] State Action ###connecting### --->>> ###wifiConnected_ipObtaining###
[WF][PF] Using profile, idx is @0
[WF][SM] Entering wifiConnected_ipObtaining state
[WF][SM] DHCP Starting...0x42014b54
[APP] [EVT] connected 4539
-----------------> AABA Request:
A-MSDU: Permitted
Block Ack Policy: Immediate Block Ack
TID: 0
Number of Buffers: 64
-----------------> AABA Response:
A-MSDU: Not Permitted
Block Ack Policy: Immediate Block Ack
TID: 0
Number of Buffers: 8
ssn: 0
timeout: 0
tid 0
IP:192.168.1.112
MASK: 255.255.255.0
Gateway: 192.168.1.1
[lwip] netif status callback
IP: 192.168.1.112
MK: 255.255.255.0
GW: 192.168.1.1
[WF][SM] Exiting wifiConnected_ipObtaining state
[WF][SM] State Action ###wifiConnected_ipObtaining### --->>> ###wifiConnected_IPOK###
[WF][SM] Entering wifiConnected_IPOK state
[APP] [EVT] GOT IP 5594
[SYS] Memory left is 155904 Bytes
[      5601][INFO: main.c:  70] <<<<<<<<<<<<<<<<<<udp multicast start<<<<<<<<<<<<<
[      5606][INFO: main.c:  71] multicast addr:224.0.1.0:7878
Message Receiving and Sending

Other nodes participating in multicast must maintain the same network segment as Ai-WB2 to achieve communication.

The project will send the same multicast message when receiving the multicast message.
(other log)...
[    221662][INFO: main.c:  76] 192.168.1.111:Hello Ai-WB2
[    221666][INFO: main.c:  81] udp multicast data:Hello Ai-WB2
[    223070][INFO: main.c:  76] 192.168.1.111:Hello Ai-WB2
[    223074][INFO: main.c:  81] udp multicast data:Hello Ai-WB2
[    223828][INFO: main.c:  76] 192.168.1.111:Hello Ai-WB2
[    223832][INFO: main.c:  81] udp multicast data:Hello Ai-WB2
Troubleshooting

For any technical queries, please open an [issue](https://github.com/Ai-Thinker-Open/Ai-Thinker-WB2/issues) on GitHub. We will get back to you soon.