UDPWRITE Keyword

UDPWRITE dest-ip$, source-port, dest-port, data$

Sends a UDP datagram to dest-ip$ : dest-port with payload data$, using source-port as the local port.

• source-port and dest-port must be in 0 to 65535.
• data$ must be between 1 and 65530 characters.

Note

Invalid port numbers raise: Invalid UDP port number.

Invalid payload size raises: Invalid UDP packet length.

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How to read it

• Provide a dotted-quad destination IP (e.g. "127.0.0.1").
• Use together with UDPBIND/UDPREAD$ for simple local tests.

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Examples

UDPWRITE "127.0.0.1", 1234, 8080, "hello"

UDPBIND "0.0.0.0", 8080
UDPWRITE "127.0.0.1", 1234, 8080, "ping"
PRINT UDPREAD$(8080)

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Notes

• The payload is transmitted exactly as provided in data$.
• Ensure the destination host and port are reachable on your network.

See also:
UDPBIND · UDPREAD$