Sending HEX to RS232

Also just double check your serial cable between the PAC and your read device, check the pinouts in the PAC manual, also remember you need to have RX going to TX on the connection between devices..

 

Thanks for your input. I have tried rebooting the unit also. I think i'm getting closer to whats going on, its not sending out HEX at all, its sending out ASCII!! See bellow.

Is the WriteSerial command even correct in this instance? Should I be using the IntToHexString for example?

OK and as for the cable how do I verify that? Are you talkin about some kind of cross over cable? The one I'm using is pictured on the first page.

 

Well bugger. I finally figured out how to send the command correctly and it appears the unit has now died. It no-longer responds to requests . It powers up but does nothing, not even with the original control software which always worked fine.

I worked out that there needed to be a '' before the command;

WriteSerial(1, ''#$55#$56#$00#$00#$00#$03#$02#$B0);

If it decides to start working again I'll update the thread however I don't hold much hope.

Thanks for everyone that tried to help along the way. Disappointing outcome.

Edit:

I can also confirm that the PAC does actually send out the command from the serial port with the correct command above. I was able to caputre it with the monitoring software. So annoying to put in all this time to get it working and have it die.

 

So I had a chance to try this today with a spare PAC and it works fine using

WriteSerial(1, #$55#$56#$00#$00#$00#$03#$02#$B0);

Not sure why the extra quotes do anything. That's just putting an empty string at the start.

 

Not sure why it worked the other way for me. What firmware is on your PAC?

I've ordered another RS232 relay; they aren’t that expensive. It was for a personal project anyway so I will update this thread with the success or failure of the new one. I just can't let it beat me!!