Q24CLASSIC debugging option


#1

Dear Friends,

I am testing my Q24 classic kit with UART interface,
i am using RS232 signalling using a logic level shifter.
if i send a command through RS232 to Wireless CPU, it is receiving the command and giving response with distortion.
can you help to solve this problem


#2

What do you mean by that?

What is the nature of this “distortion”?


#3

distortion in the sense that the grounding of the data signal is not going to zero level properly.

i personally suspect on the grounding options of Q24 CLASSIC module.

In datasheet they have mentioned as shielding legs to be used as ground; but in my practical case the Flash LED is glowing if 3.6V is given to shielding legs instead of giving ground.
kindly suggest whether it is a problem with module or else with some other options,

if you need my circuit schematics, i will send it to you

Thanks,
Jayaprakash


#4

Why would you not supply ground to the shielding???

Best Regards,
Jan


#5

As Jan says, if the datasheet tells you to do that, why would you do anything else? :open_mouth:

And, if the datasheet tells you to do that, you don’t do it, and things don’t work - then, obviously, your first step must be to do what the datasheet tells you, mustn’t it!