Digital Multimeter provides both a command-line interface and a Python module interface to receive data from a variety of digital multimeters.
Home Page: https://digital-multimeter.readthedocs.io
License: BSD 2-Clause "Simplified" License
Excellent software using cli but could you add a very simple Python example showing how to take single or multiple readings. I am trying to follow the limited python documentation but I am missing something...
got a ES51972Q chip in a multimeter that i get readings from but it does not work with this application, it would be great to have support for this DMM-chip, saw some information about this cyrustek chip at sigrok..
Heres the pdf doc about the chip...
https://sprend.com/download?C=78909c1555894999a80722da8b113a4f
I will try make a try to port this but im not so good at python yet.
Hi,
I am using the dmm to read data on a "once per cycle" basis in a python loop. I can see the multimeter screen has changed significantly but the data read from the usb is hardly changed. I realise that there is a pipeline of data being read and I am only seeing the next entry in the list ( around 0.5 s after the initial reading) when it should be a reading from ~10s later. I can clear the list by using dmm(connect=None) followed by dmm(connect=/usb0, model...) but this stops program execution and does not always reconnect. Is there a simple way to make only one reading and then clear the rest of the entries?
BTW I am using a BTMETER BT-90EPC which works fine when model UniTrend_UT60E is used
been trying out various types of solution.
client <->wifi/telnet<->ser2net(192.168.1.238:23)<->serial device
Client side.(windows os)
create temporary virtual com port(COM8) and point to 192.168.1.238:23 using software HW Virtual Serial Port
start cmd...
dmm read --connect COM8 --count 0
it works perfect...
Client side. (debian)
pi@raspberry:/dev $ sudo socat pty,link=/dev/ttyNET0,waitslave tcp:192.168.1.238:23
pi@raspberry:/dev $ sudo chmod 666 /dev/ttyNET0
pi@raspberry:/dev $ dmm read --connect /dev/ttyNET0 --count 0
gets error:
/home/pi/.local/lib/python3.9/site-packages/future/standard_library/__init__.py:65: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
import imp
Traceback (most recent call last):
File "/home/pi/.local/bin/dmm", line 8, in <module>
sys.exit(dmm())
File "/home/pi/.local/lib/python3.9/site-packages/digital_multimeter/cli/entrypoints.py", line 12, in dmm
click.dmm()
File "/home/pi/.local/lib/python3.9/site-packages/click/core.py", line 1130, in __call__
return self.main(*args, **kwargs)
File "/home/pi/.local/lib/python3.9/site-packages/click/core.py", line 1055, in main
rv = self.invoke(ctx)
File "/home/pi/.local/lib/python3.9/site-packages/click/core.py", line 1657, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/home/pi/.local/lib/python3.9/site-packages/click/core.py", line 1404, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/home/pi/.local/lib/python3.9/site-packages/click/core.py", line 760, in invoke
return __callback(*args, **kwargs)
File "/home/pi/.local/lib/python3.9/site-packages/digital_multimeter/cli/click.py", line 80, in get_reading
cli_output(api.get_reading(), format=format, output=output, count=counted)
File "/home/pi/.local/lib/python3.9/site-packages/digital_multimeter/DigitalMultimeter.py", line 38, in get_reading
self.__load_multimeter()
File "/home/pi/.local/lib/python3.9/site-packages/digital_multimeter/DigitalMultimeter.py", line 47, in __load_multimeter
module = __import__("digital_multimeter.multimeters.{}".format(class_name), fromlist=["digital_multimeter"])
File "/home/pi/.local/lib/python3.9/site-packages/digital_multimeter/multimeters/MultimeterFortuneFS9721.py", line 5, in <module>
from serial import SerialException
sudo picocom -b 2400 /dev/ttyNET0
and i can see i get something unreadable...
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