Re: [tlug] Pulse counter over RS232

[Kalin KOZHUHAROV <me.kalin@example.com>]

On Mon, Apr 18, 2011 at 07:00, Henri Servomaa <r_muffin@example.com> wrote:
> Kalin KOZHUHAROV kirjoitti 18.4.2011 kello 3.21:
>> As part of a DIY Geiger counter logging backend, I'd like to read
>> properly formatted pulses over RS232 on my box (and later on my
>> Gumstix).
>
> Do you mean there's no data protocol, but you just want to read some data value(s) ?
>
No data protocol, just a 5V pulse/count across two wires, random in
time. Usually it is about 100 counts per minute (cpm), but with
radiation sources it grows to a few thousand. The software needs to
sample say every 10 seconds and see how many counts were there during
that time.

I know this is possible with software only, I have the windoze
software that is working, but it is very user "firendly" showing
graphs and playing beeps, but doesn't properly log data and is
proprietary. All I want to to just log the data every N seconds like:
# from				to					counts
2011-04-04T10:10:00		2011-04-04T10:10:10		00000000323
2011-04-04T10:10:00		2011-04-04T10:10:10		00000000312
....

>> Any idea/software on how to do that?
>>
>> I have seen http://geiger.sourceforge.net/ but after some tinkering it
>> is still not working.

> You can start by verifying the serial speed and parity set in the program  matches what the device is set to.
>
Correct me if I am wrong, but there is no speed, parity or stop bits.
This is reading raw "data".
I guess my thing is wired a bit differently, will investigate that.

Cheers,
Kalin.