RS-232 confusion

[Christopher4187]

This may be a case of a dog chasing his own tail but I'm trying to figure out if what I'm looking at is an RS-232 signal. I've tried various baud rates and it seems to be something around 9600 as that's the most consistent data I can see on the screen. Each piece of data is 500uS. If it's not RS-232, can anyone identify the communication protocol?

[richard]

definitely not rs232 and not a Manchester code , its a rtz(return to zero) stream of some sort . where does it come from and is there any identifiable start/stop sequence


bi-phase ?

[rsocor01]

Also, RS-232 signals go from -12V to +12V. What you have there is some kind of 1-wire serial communication going on.

[Christopher4187]

It is one wire communication. The voltage level is 18VDC. What you see in that picture the output from a RS-232 IC. I can identify the start/stop and know what each piece of data is. The problem is, I have to do it with my oscilloscope and eyes as opposed to using a PIC to interpret it.

Each bit is 500uS. The high/low within the 500uS bit is predetermined. In other words, it may be 200uS off and 300uS on or 400uS on and 100uS off but I know before the packets starts. The entire packet is 100mS long.

What is the best way to get this information to a PIC where I can log it instead of staring at my oscilloscope?

[richard]

if you can't identify the device then a complete transaction from line idle to send/receive and back to idle with a data translation would help . guessing seems pointless

[Demon]

If you know it's RS232, why not send into a PC?

Assuming you don't have a Saleae logic probe or other device capable of reading signal.

Robert