Re: [PLUG] Serial communication with dmm

I appreciate you forwarding this to me. However, I find most of what is described is above my head; also it may require Windows I do not have. I have been distracted by another issue for a while now, but that is solved, so I intend to get back to the DMM shortly. The last effort I put into it

Re: [PLUG] Serial communication with dmm

Today I chanced upon "USPPcap" - a utility designed to capture traffic on USB ports. http://desowin.org/usbpcap/tour.html It seems to me, since the Windows-based software for this thing works well, and you have a USB->serial adapter, this utility could potentially be used to monitor the traffic

Re: [PLUG] serial communication with dmm

Someone here, probably Wes, thought me embarrassing lesson: http://lmgtfy.com/?q=python+crash+course Put one/two day into learning basic python data types and syntax. It will be worth it, I guarantee it. T On Jan 15, 2018 6:57 PM, "Denis Heidtmann" wrote: > Well,

Re: [PLUG] serial communication with dmm

Well, I have solved the issue of "mult=self.units.strip()+' '[0]: TypeError: can't concat bytes to int". It needs parentheses, which the original code had. Now the code runs, but, alas, now it does not report the readings from the meter. Since I really do not understand object-oriented

[PLUG] serial communication with dmm

Last discussion on this issue I mentioned a python program I found. I have since put the program in Spyder using Python3. I had to make a number of changes to accommodate the change to 3. The latest is that I see that the readings are available to the program although parsing the data is

Re: [PLUG] Serial communication with dmm

Do you mean you are seeing data values from the DMM? If so, does the same software work with the USB-serial cable? You might need to modify the code to use /dev/ttyUSB0 instead of /dev/ttyS0. On Jan 7, 2018 10:04 AM, "Denis Heidtmann" wrote: > > On Mon, Jan 1, 2018 at

Re: [PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

I'm a nomad. Let's see how this week turns out. I may have some time on Friday. You can always email me off list. I'll call or text you later when I have more info about my availability. -wes On Mon, Jan 1, 2018 at 3:30 PM, Denis Heidtmann wrote: > Fantastic, Wes!

Re: [PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

Tomas, Thanks so much for the offer. I will look at the Bitscope website to see if it would help. -Denis On Fri, Dec 29, 2017 at 3:36 PM, Tomas Kuchta wrote: > I have one of those simple Bitscope scopes/analysers for slow RPi type > interface hacking it might

Re: [PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

I have one of those simple Bitscope scopes/analysers for slow RPi type interface hacking it might be the right tool for the job and it runs on Linux. Would that help? Do you want to borrow it? Check the Bitscope website for details, but it is good enough for serial ports. Perhaps even decoding

Re: [PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

I made the measurements with my 'scope. The voltages and waveforms are identical comparing DTR, RTS (also RXD), although I am surprised a little that the pulses on DTR are as large as they are: 2.4V swing. Must be some resistance in the supply to the drain. But the level is up at 11.6V, so

Re: [PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

I will make those measurements, but I am doubtful it will show anything. The schematic I have shows DTR to be the collector and RTS to be the low end of the emitter resistor of the output NPN. I did see solid pulses on the emitter with sigrok. But perhaps DTR and/or RTS are pulsed when they

Re: [PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

Have you measured the voltages on DTR and RTS during the runs? Try it with sigrok and with the vendor software and see if there is a difference in those values. On Thu, Dec 28, 2017 at 9:51 PM, Denis Heidtmann wrote: > This saga continues. > > On the laptop with a

[PLUG] serial communication with dmm (was com port in guest to usb in host (virtual box))

This saga continues. On the laptop with a usb-serial adapter I got to the point where the commands: sigrok-cli --driver mastech-mas345:conn=/dev/ttyUSB0 --show sigrok-cli --driver mastech-mas345:conn=/dev/ttyUSB0 --scan sigrok-cli --driver mastech-mas345:conn=/dev/ttyUSB0 --samples 10 behave as