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_sendUDP
Send a Udp message, specifying the internet address of the udp server, and the message to send.Parameters
I _sendUDP ( S _udp_address_ Comm _message_ ) 
Return value
_udp_address_ defines the udp address where to send the message. It must be 'ip_address:port', such as '1.2.3.4:1234' _message_ message to send 
always 0