OPEN SOURCE SERIAL PORT SNIFFER CABLE PC

If it is installed fairly permanently, that one-time setup transmission may not be an issue.Īssuming this all works out, all you would need is something to read the serial input on the PC side and log the data. You could use a cheap microcontroller to sniff the line and do reporting as to what occurs. If either end of the system receives it, especially if it's been connected prior to, it may jimmy things up - essentially it will read the 01010101 of the sniff line as nonsense commands.

It consists of 96 (if I remember correctly) pulses across the TX line (from host to device, should my memory be good) to synchronize clocks, as RS232 doesn't provide a clock transmission line (that's where the term asynchronous serial comes in). I stand to think that would work, although I'm wondering whether during initialization that chip would attempt to transmit a packet header, which would send the entire system to hell in a handbasket fast.īasically, without breaking down the protocol too much, the packet header is what is sent during startup. If your PC doesn't have a standard DB-9 RS232 serial connection, you can use a FTDI chipset to transform that into the USB protocol for receiving. The simplest way to sniff the connection on a PC would be to wire/solder a jumper cable - that is, a 1-2' inert cable that is a male-to-female connection, but with a second leg that goes to a PC (think a 'T' junction). Are you merely looking for a method to receive the data on another machine for sniffing? Hopefully this one, because it is easier than trying do that AND interpret the data - without the structure or format of the commands, we can't advise much more than that.

Open source serial port sniffer cable