UDPWRITE

UDPWRITE

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Action

Write UDP data to a socket.

 

 

Syntax

Result = UDPwrite( IP, port, socket , var , bytes)

Result = UDPwrite( IP, port, socket , EPROM, address , bytes)

 

 

Remarks

Result

A word variable that will be assigned with the number of bytes actually written to the socket.

 

When the free transmission buffer is large enough to accept all the data, the result will be the same as BYTES. When there is not enough space, the number of written bytes will be returned.

 

When there is no space, 0 will be returned.

IP

The IP number you want to send data to.

 

Use the format 192.168.0.5 or use a LONG variable that contains the IP number.

Port

The port number you want to send data too.

Socket

The socket number you want to send data to(0-3).

Var

A constant string like "test" or a variable.

 

When you send a constant string, the number of bytes to send does not need to be specified.

Bytes

A word variable or numeric constant that specifies how many bytes must be send.

Address

The address of the data stored in the chips internal EEPROM. You need to specify EPROM too in that case.

EPROM

An indication for the compiler so it knows that you will send data from EPROM.

 

The UDPwrite function can be used to write data to a socket that is stored in EEPROM or in memory.

When you want to send data from an array, you need to specify the element : var(idx) for example.

 

Note that UDPwrite is almost the same as TCPwrite. Since UDP is a connection-less protocol, you need to specify the IP address and the port number.

 

notice UDP only requires an opened socket. The is no connect or close needed.

 

 

See also

CONFIG TCPIP, GETSOCKET , SOCKETCONNECT, SOCKETSTAT , TCPWRITESTR, TCPREAD, CLOSESOCKET , SOCKETLISTEN , UDPWRITESTR , UDPREAD , UDPREADHEADER, URL2IP

 

 

Example

See UDPwriteStr