DigitalMultimeter

This utility reads the serial port data from the RadioShack Digital Multimeter 22-812 and translates it into human-readable output.

• Language: Python
• OSes Tested: Linux
• License: GPLv2+

Browse the source at the top level or trunk​. Or use the Subversion checkout URL.

View open tickets

The data sheet is ​available.

Example

If your serial port is, say, /dev/ttyUSB0, you would run it something like su -c "./digitalmultimeter.py /dev/ttyUSB0", and use ^C to kill it. The output will look something like this:

1206840186.138602 DC V AUTO RS232 - 009.8  m V
1206840186.419604 DC V AUTO RS232 - 007.8  m V
1206840186.669599 DC V AUTO RS232 - 007.8  m V
1206840186.918569 DC V AUTO RS232 - 008.3  m V
1206840187.168605 AC V AUTO RS232 ~ ---.-  m V
1206840187.449606 AC V AUTO RS232 ~ 304.8  m V
1206840187.761612 AC V AUTO RS232 ~ 300.8  m V
1206840188.010604 DC uA AUTO RS232 ---.- u A
1206840188.260576 DC uA AUTO RS232 000.0 u A
1206840188.541612 DC uA AUTO RS232 000.0 u A
1206840188.790602 DC uA AUTO RS232 000.0 u A
1206840189.040602 DC mA AUTO RS232 --.--  m A
1206840189.331640 DC mA AUTO RS232 00.00  m A
1206840189.601607 DC mA AUTO RS232 00.00  m A
1206840189.881570 DC mA AUTO RS232 00.00  m A
1206840190.132610 OHM AUTO RS232 ---.-  Ohm
1206840190.381606 OHM AUTO RS232 ---.-  Ohm
1206840190.631607 OHM AUTO RS232  .0F   K Ohm
1206840190.880600 OHM AUTO RS232  0.F   K Ohm
1206840191.130583 OHM AUTO RS232  0F.   K Ohm
1206840191.398708 OHM AUTO RS232  .0F   M Ohm
1206840191.660601 OHM AUTO RS232  .0F   M Ohm
1206840191.941613 CONT RS232 BEEP Open  
1206840192.191605 CONT RS232 BEEP Open  
1206840192.440545 CONT RS232 BEEP Open  
1206840192.690597 CONT RS232 BEEP Open  
1206840192.940560 CONT RS232 BEEP Open  
1206840193.189600 CONT RS232 BEEP Open  
1206840193.439560 HZ AUTO RS232 ---.-  Hz
1206840193.720864 HZ AUTO RS232 060.0  Hz
1206840193.969599 HZ AUTO RS232 060.0  Hz
1206840194.239601 HZ AUTO RS232 060.0  Hz
1206840194.500598 HZ AUTO RS232 060.0  Hz
1206840194.789571 HZ AUTO RS232 060.0  Hz
1206840195.061609 HZ AUTO RS232 060.0  Hz
1206840195.342567 HZ AUTO RS232 060.0  Hz
1206840199.105551 HFE RS232 0000 hFE 
1206840199.354549 HFE RS232 0000 hFE 
1206840199.666572 HFE RS232 0000 hFE 
1206840199.916550 HFE RS232 0000 hFE