RS232 monitor

[RonH]

I'm looking to build an RS232 monitor.
Can it be built without a microcontroller?
I have a feeling that it can't, I tought about using both RX's of a MAX232 but if I tied the output together one would hold the other down. I feel I have to bitbang two RX's and output on my Hardware Usart the combined inputs.

Ron

 

[panic mode]

it depends what you call RS232 monitor.
here is circuit for monitoring RS232 using computer.
https://rs232.hw.cz/images/db9_monitor.gif

in local store they sell 'RS232 monitor' which is straight through
adapter with bunch of LEDs to monitor individual signals.
soooo.... what do you need?

 

[RonH]

I need to log the events between a master and slave but the two logs have to be alinged as we hare having a problem with some commands. I can do it with one pass with the RX then another with the TX but that is too slow.

I'm monitoring the 5V side then it goes into a MAX 232 to the computer.

I'll try that circuit you showed me and I'll see if that works.

Thanks

Ron

 

[ljcox]

Hello panicmode,

Thanks for the tip.

What software is required in the computer to read the RS232 data?

Len

 

[RonH]

I use ZOC but Hyper term will work.

Ron

 

[ljcox]

Thanks Ron,
Are these freeware? If so, would I find them at a free download site?

Internet searching is not my speciality.

Len