MightyOhm GC support?

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5 years 10 months ago #1532 by fusebit
Hi,

I would like to ask if it would be possible (for you ThibmoRozier ;) ) to add the MightyOhm geiger counter protocol to the pyradmon?

The GC reports like this:

The data is reported in comma separated value (CSV) format:
CPS, #####, CPM, #####, uSv/hr, ###.##, SLOW|FAST|INST

KR

fusebit

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5 years 10 months ago - 5 years 10 months ago #1593 by jnissen
Replied by jnissen on topic MightyOhm GC support?
What is the command format to configure the Mighty Ohm? Specifically if it shows up as a COM port what do we issue to configure the device or does it spit out the serial data all the time by default. For other makes (GMC for instance) you have to enable the output and issue a request to obtain the CPM. You mentioned the format it returns but if that format can be requested on an as needed basis.

EDIT - I just looked at the source code for the Mighty Ohm. Looks like it's primarily a transmit only type of device and really doesn't have support for receiving a command from the serial port. Could be modified easily enough if you wanted.
As for if Pyradmon can work. I'll assume you could just sniff the port that was attached and look for the strings as they come through. Should be easy enough to modify.
Last edit: 5 years 10 months ago by jnissen.

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5 years 9 months ago #1652 by ThibmoRozier
Replied by ThibmoRozier on topic MightyOhm GC support?
Sorry for the late response.

Could try using the MyGeiger setting as it only listens to the serial port.
CSV format is mainly generated by the application itself. (Unless the counter has a huge EEPROM. :P)
Could have a look to see if it requires some magic from our side.

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5 years 8 months ago #1754 by ThibmoRozier
Replied by ThibmoRozier on topic MightyOhm GC support?
Double checked and indeed, they output CSV over serial..
Should be fairly simple to retrieve data though I would need a tester for this. :)
And not sure how it will handle CPM after 30 seconds.
So maybe better to use CPS, then do the maths for 30 seconds..

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4 years 7 months ago #2927 by fusebit
Replied by fusebit on topic MightyOhm GC support?
Just one year later ;)

After having the Geiger counter and the Raspberry Pi on the shelf for a long time, I solved the issue by modifying the firmware of the AVR.
Due to the fact that I'm more familiar with the microcontroller than with Phython this was the easiest way.

Now the system is up and running again :silly:
The following user(s) said Thank You: mw0uzo

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4 years 7 months ago #2939 by fusebit
Replied by fusebit on topic MightyOhm GC support?
Now I finished some mechanical work :)
The Raspberry Pi is mounted with stand-offs to the back of the migthyohm Geiger counter. Now the RCA jack supports the whole thing from tipping over.
The Geiger counter is powered via the simple eb.. USB adapter.

Some pictures attached, this setup should run for some time now...







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