UDPREAD$ Function

S$ = UDPREAD$(port)

Dequeues the next UDP packet for port and returns its payload as a string.

• If the queue is empty, returns an empty string (""), sets the last-source details to 0.0.0.0 and 0.
• On success, you can query the sender details with UDPLASTIP$ and UDPLASTSOURCEPORT.

Note

If port is outside 0 to 65535, an error is raised: Invalid UDP port number.

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How to read it

• Call after UDPBIND.
• Each call removes one packet from the queue (FIFO).

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Examples

UDPBIND "0.0.0.0", 8080
S$ = UDPREAD$(8080)
IF LEN(S$) > 0 THEN
    PRINT "From "; UDPLASTIP$; ":"; UDPLASTSOURCEPORT
    PRINT "Data: "; S$
END IF

UDPBIND "0.0.0.0", 9000
S$ = UDPREAD$(9000)
PRINT S$

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Notes

• The returned string is the exact payload that was sent.
• UDPLASTIP$ and UDPLASTSOURCEPORT always refer to the most recent packet returned by UDPREAD$.

See also:
UDPBIND · UDPLASTIP$ · UDPLASTSOURCEPORT · UDPWRITE