Sniffing UART transmission.

[Lazureus]

Dear GURU's

I would like to sniff the UART transmission between two uC, what should I do ? I have data cable which has Rx, Tx and GND signals, how should I connect the data cable to the bus ? Do I need any resistors or diodes in order to not interfere with uC communication ?

Regards
Lazureus

 

[bigdogguru]

What you're looking for is commonly referred to as a "Tap."

Here are some links with basic designs:

RS232 serial spy monitor cable

RS232 Com Tap Monitor

EZ-Tap™ RS-232 Passive Tap Module

If you Google "RS-232 Tap" you'll find an abundance of links.

Ciao

 

[Lazureus]

Thanks a lot, this is what I was looking for

Cheers