Try talking to the DMM directly over serial. The protocol description says:
Various multimeters from Metex (and rebadged ones) use this common 14-byte packet based ASCII protocol. The actual multimeter ICs in the devices have different names (e.g. "MASTECH M343-01" or "Metex KS57C2016") but they all use the same common protocol format. The serial port settings can vary from device to device, e.g. 600/1200 baud, 7n2, RTS low, DTR high. If you get the serial parameters right, you ought to be able to talk directly at it (e.g. send a D and get a string of bytes). Maybe you can snoop the serial with an oscilloscope while running the vendor interface software and figure out the baud,et al. On Sun, Dec 10, 2017 at 2:08 PM, Denis Heidtmann <denis.heidtm...@gmail.com> wrote: > Thanks for the -help. I got part of that -help when I entered an incorrect > option, but somehow missed the -- entries at the end. Here is what I get: > > denis@denis-ThinkPad-L420:~$ sigrok-cli --driver > mastech-mas345:conn=/dev/ttyUSB0 --scan > The following devices were found: > mastech-mas345 - MASTECH MAS345 with 1 channel: P1 > > denis@denis-ThinkPad-L420:~$ sigrok-cli --driver > mastech-mas345:conn=/dev/ttyUSB0 --show > mastech-mas345 - MASTECH MAS345 with 1 channel: P1 > Supported driver options: > conn > serialcomm > Supported configuration options: > denis@denis-ThinkPad-L420:~$ > > Additionally I tried: > denis@denis-ThinkPad-L420:~$ sigrok-cli --driver > mastech-mas345:conn=/dev/ttyUSB0 --loglevel 5 > sr: libsigrok loglevel set to 5. > sr: backend: Sanity-checking all drivers. > sr: backend: Sanity-checking all input modules. > sr: backend: Sanity-checking all output modules. > srd: libsigrokdecode loglevel set to 5. > Usage: > sigrok-cli [OPTION...] > snip... > > I also tried the --output-file but nothing. I found that I could not enter > more than one option at a time---I tried --scan and --show but only the > first one was responded to. > > BTW, recall that this instrument worked as expected using the vendor's > windows sw on the desktop, where I have a serial port. So I do not suspect > the hardware outside the laptop. > > These results are encouraging, but no cigar. > > -Denis > _______________________________________________ > PLUG mailing list > PLUG@pdxlinux.org > http://lists.pdxlinux.org/mailman/listinfo/plug _______________________________________________ PLUG mailing list PLUG@pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug
