On 04/23/2015 04:00 AM, Gregg Eshelman wrote: > On 4/22/2015 8:10 PM, linden wrote: >> May be easer to make a physical sniffer cable that "T's" in to the com >> you are trying to sniff and connect the other end to a laptop running >> linux and log with cutecom or similar terminal program. I had a fancy >> cable made that split the transmit and receive line split to 2 separate >> 9pin sub Ds and was able to log data going in each direction separately. >> Was quite handy at the time. > Got a schematic for that? Wouldn't there need to be some sort of > isolation to avoid interference from the sniffing PC? > No. People have done this for ages. Just tie ground and either TX or Rx from the system to be observed to ground and Rx of the monitoring computer. If you are concerned about isolation, you could use a laptop, if you have one with a serial port. But, this is done all the time, RS-232 is a high-voltage signalling scheme, and very immune to noise.
Jon ------------------------------------------------------------------------------ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
