quickCPM

GMC-320 Radiation Detector Python Utility

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Overview

Stand-Alone, Non-GUI Single python script which reads the CPM data from a Geiger-Counter GMC-3xx (GQelectronics) via USB. Stores CPM and Temperature into (per day) csv log file for analysis. (stamp,value)
Creates a bar graph and gauge html file for viewing current status in a browser. Written as a simple interface on Raspberry Pi to be included in home monitoring. New: 2018Mar08 - Added FTP (ftplib) capability to upload gauge and bar html files to a web server.

Device

GMC-3xx (GMC-300, GMC-320) is a hand held geiger counter. Is is build around a M4011-Geigertube.

• Length of tube about 100mm,
• Background counts around 20 count per minute.
• Size of memory: 64k.

Software Options

• Per second loop time adjustment argument.
• CLI Only, no GUI

Software structure

The program is written in Python 2.7 Python Data retrieval and serial calls referenced from GMC-3xx Datalogger (see references) May work with other GMC models, only tested on gmc-320+

CLI output is:

 03/11/2018 07:30:00 24 (Peak:32) -Time

 22.6c - 63.64f -Temp in C and F

 23 chars written to logs/gmc_20180311_cpm.csv   -CSV output files CPM

 31 chars written to logs/gmc_20180311_temp.csv  -CSV output files Temperature

 1959 chars written to index.html                -Bar graph html output file html

 4513 chars written to gauges.html               -Gauge graph output file html

Installation

Requirements:

• Python 2.7 (will possibly work with other versions) and following libraries:
• datetime
• struct
• time
• os
• serial

You may need to change the USB port, baud for your unit. This can be done on line 10 of the script device,baud rate, timeout. line 10: gmc= serial.Serial('/dev/ttyUSB0', 115200, timeout= 3)

(Unzip) or save files below in a directory and start: In terminal session in that directory run: $ python quickcpm.py 60 Where 60 is optional time per second you want it to loop the connection. Default is 300 which is 5 minutes

Forum URL: [247Coding.com] (http://247coding.com/drupal/?q=quickCPM)

Files: Requires

• quickcpm.py # main python program
• /logs # directory where csv logs are saved
• gauge.min.js # gauge builder referenced in html script reference.

https://canvas-gauges.com/ - for more gauge scripts and instructions on changing options.

License

GNU General Public License version 3.0 (GPLv3) (https://www.gnu.org/licenses/gpl-3.0.de.html)

Limitations

Script is written without much exception validation due to time constraints. Your mileage may very.

Solutions:

• Output CPM/Temp data to terminal.
• Output CPM/Temp data to CSV.
• Output to local HTML files for gauge and bar views with link button to switch.

References:

• GMC Data Logger Reference for hex-string conversion.
• Canvas Gauges Download/Link for gauge js
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