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