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rs485 sniffing

 
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M@riE
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rs485 sniffing
PostPosted: Mon Jan 19, 2009 8:11 pm     Reply with quote
Hi everyone. I have a piece of hardware that continuously sends data using rs485 communication protocol. What I want to do is get the data that it is sending, my problem is that I don't know what address it sends its data. The code I have can only get the data if it knows the address beforehand. Is there a way to get around this problem? Please help. Thanks in advance.
dyeatman



Joined: 06 Sep 2003
Posts: 1924
Location: Norman, OK

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PostPosted: Mon Jan 19, 2009 8:57 pm     Reply with quote
If the transmitted data is ASCII I make a RS485 monitor with the receive half of a 485 transceiver and send the resulting TTL output to a serial com port and a terminal monitor program like teraterm or hyperterminal. You will see everything transmitted on the 485 bus.
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