Hi Mike, everyone, Reading a bit more, I see the scan will only find the device if it's sending data (the device is sending data blindly wheneve instructed to). The detection just waits a few packets to see if then can be parsed correctly.
Additionally, the button situation is as John explained: there is a Setup button to the right, but that is to setup Sorting function of the meter (apparently you can set it up for a PASS/FAIL mode for a given component value and tolerance). The right button is the one labelled "USB", which is the North position on the center circular keypad. The manual doesn't say much, but since it is a dedicated button, I expect it needs to be pressed after powerup. I suggest the following process: 1. Check udev rules and permissions. 2. Check lsusb if the device is present on the USB bus. 3. Run `sigrok-cli -l 5 --scan` (in case the USB is already on and persistent). 4. Press the USB button (North on the circular keypad). 5. Run `sigrok-cli -l 5 --scan` again. If everything is allright, I think this shoud work. If possible, you can also try to snap a picture of the DMM screen to see if it's in the right mode. Otherwise, I'm afraid more debugging will be needed and it'd be more practical to find somebody local to help you out. Btw. don't hesitate to ask if anything here is not understood by you due to screen reader or other reason. I'd be happy to clarify. Best regards, Ladislav On Tue, Nov 25, 2025 at 01:53:58PM +0000, John via sigrok-devel wrote: > Mike, > > I don't have this meter, but it appears that Co-Pilot is indeed mis-leading > you. The far right button below the screen is marked Setup. However, > looking at a picture of the meter on my screen, there are a further two > buttons below that row on the far left and the far right. Below that, in the > centre of the unit there are another four buttons. The top one of those is > marked U S B. I think this is the one you need to press. The manual states > that an 'S' should appear in the upper left of the screen which I appreciate > is not going to be much help to you. > > The manual is otherwise pretty unhelpful. It refers to a PC key which does > not exist and I think it probably means the USB key. It then says to insert > the USB wire and start the software on the PC. > > The PC communication protocol section states that the communication > parameters are: > > - bit rate 9600 baud > > - 8 data bits > > - 1 start bit > > - 1 stop bit > > I have no idea what 'inspection: without' means? Could it be a poor > translation of 'parity - none'? > > If so, then it sounds like the default parameters 9600, N, 8, 1 should work. > > I hope you reader interprets my e-mail OK and the information here helps. > > John Ch. > > On 25/11/2025 13:35, Michael A Ray via sigrok-devel wrote: > > > > > > Ladislav, > > > > Thanks for this. > > > > Unfortunately I have now established, with the help of copilot AI, that > > the four north, east, south, west buttons manipulate menus, and the > > right-most soft button under the display is the enter button. > > > > And as I am blind, I will not be able to navigate those menus to know > > when the USB option is selected nor whether to press the button. > > > > I might be able to give the meter to a friend at my local Linux User > > Group and ask him to write a 'menu road map'. But it is going to be > > difficult to work. If I could establish whether the USB option persists > > between power cycles, it might be that turning it on once is enough. > > > > But, as Dan has suggested it is TX only, I will probably need to write a > > continuous reader of my own. Possibly compile in the eSpeak library to > > make it speak measurements. > > > > Thanks for your help with udev, I had forgotten all about that. > > > > Mike > > > > > > On 25/11/2025 12:32, Ladislav Laska wrote: > > > Hi Michael, > > > > > > first of all, cool use case! Unfortunately, I don't have a HID meter to > > > test with. However, I have two ideas (that might be totally wrong): > > > > > > 1. Check if you have installed the udev rules. By default, sigrok > > > installs udev rules to mark all known vids/pids with ID_SIGROK=1 and > > > only auto scans those. UT612 is expected under 10c4:ea80. > > > > > > 2. Check if you have permissions to open the device. The default sigrok > > > udev rules grant permissions to users in the "plugdev" group. > > > > > > ... I suggest you also run `lsusb` to check what vid/pid we're dealing > > > with (ideally before and after you've connected to usb). > > > > > > > > > Since the chip is HID, it will not show up as /dev/tty*, but it still > > > needs permissions. Additionally, the libserialport-dev is likely not > > > needed (I'm not sure and don't want to spend time to search for it. It's > > > safer to have it), since it will be handled by serial_hid_cp2110.c > > > driver. > > > > > > This depends on: > > > > > > #ifdef HAVE_SERIAL_COMM > > > #ifdef HAVE_LIBHIDAPI > > > > > > It will require libhidapi-dev. Is this installed and compiled with? > > > > > > Best regards, > > > Ladislav > > > > > > > > > On Tue, Nov 25, 2025 at 12:04:39PM +0000, Michael A Ray via > > > sigrok-devel wrote: > > > > > > > > > > > > Dan, > > > > > > > > Thanks. I saw that in the log. Mathias' note about > > > > libserialport-dev lead me > > > > to install that, and rebuild libsigrok, but still nothing. > > > > However I have > > > > used other UniT kit, like the UT60A dmm with both RS232 and USB > > > > adapters > > > > even before installing libserialport-dev. > > > > > > > > I'm now not confident that I have the right button presses to > > > > enable USB. > > > > > > > > AI is never going to take over the world if it can't help me > > > > enable USB on > > > > the UT612 :-) > > > > > > > > Mike > > > > > > > > > > > > On 25/11/2025 11:33, Dan Horák wrote: > > > > > On Tue, 25 Nov 2025 11:07:04 +0000 > > > > > Michael A Ray <[email protected]> wrote: > > > > > > > > > > > > > > > > > > > > > > > Dan, > > > > > > > > > > > > Here below is the text of the log created. > > > > > > > > > > > > This might sound like a really stupid question, but I have no > > > > > > sighted > > > > > > assistance here. Copilot AI is telling me the right way to enable > > > > > > the > > > > > > meter for USB connectivity is to turn it on, then press > > > > > > the right-most > > > > > > soft button on the row of four buttons under the > > > > > > display. Is that right? > > > > > > Copilot has been known to tell me nonsense before now. > > > > > > > > > > the wiki page (https://sigrok.org/wiki/UNI-T_UT612) talks about only > > > > > TX connected, perhaps there is some oddity how it communicates with > > > > > tools like sigrok-cli > > > > > > > > > > > Log: > > > > > > > > > > > > sr: [00:00.000032] log: libsigrok loglevel set to 5. > > > > > > sr: [00:00.000050] backend: libsigrok 0.6.0-git-0bc24877/4:0:0. > > > > > > sr: [00:00.000095] backend: Libs: glib 2.64.6 (rt: > > > > > > 2.64.6/6406:6), zlib > > > > > > 1.2.11, libzip 1.5.1, minilzo 2.10, libserialport 0.1.1/1:0:1 (rt: > > > > > > 0.1.1/1:0:1), libusb-1.0 1.0.23.11397 API 0x01000107, hidapi 0.9.0, > > > > > > libftdi 1.4, librevisa 0.0.20130812. > > > > > > sr: [00:00.000108] backend: Host: x86_64-pc-linux-gnu, > > > > > > little-endian. > > > > > > sr: [00:00.000119] backend: SCPI backends: TCP, RPC, > > > > > > serial, VISA, USBTMC. > > > > > > sr: [00:00.000127] backend: Firmware search paths: > > > > > > sr: [00:00.000147] backend: - > > > > > > /home/mike/.local/share/sigrok-firmware > > > > > > sr: [00:00.000156] backend: - /usr/local/share/sigrok-firmware > > > > > > sr: [00:00.000165] backend: - /usr/local/share/sigrok-firmware > > > > > > sr: [00:00.000173] backend: - /usr/share/sigrok-firmware > > > > > > sr: [00:00.000181] backend: - > > > > > > /var/lib/snapd/desktop/sigrok-firmware > > > > > > sr: [00:00.000210] backend: Sanity-checking all drivers. > > > > > > sr: [00:00.000224] backend: Sanity-checking all input modules. > > > > > > sr: [00:00.000233] backend: Sanity-checking all output modules. > > > > > > sr: [00:00.000247] backend: Sanity-checking all transform modules. > > > > > > srd: libsigrokdecode loglevel set to 5. > > > > > > sr: [00:00.003443] hwdriver: Scan found 0 devices (agilent-dmm). > > > > > > sr: [00:00.003455] hwdriver: Scan found 0 devices (appa-55ii). > > > > > > sr: [00:00.003464] hwdriver: Scan found 0 devices > > > > > > (arachnid-labs-re-load-pro). > > > > > > sr: [00:00.003474] serial: No serial device specified. > > > > > > sr: [00:00.003484] asix-omega-rtm-cli: Vendor application > > > > > > executable: > > > > > > omegartmcli > > > > > > posix_spawn avoided (fd close requested) > > > > > > sr: [00:00.004331] asix-omega-rtm-cli: External RTM CLI > > > > > > execution failed. > > > > > > sr: [00:00.004347] hwdriver: Scan found 0 devices > > > > > > (asix-omega-rtm-cli). > > > > > > sr: [00:00.004380] hwdriver: Scan found 0 devices (asix-sigma). > > > > > > sr: [00:00.004390] serial: No serial device specified. > > > > > > sr: [00:00.004399] hwdriver: Scan found 0 devices (atorch). > > > > > > sr: [00:00.004408] hwdriver: Scan found 0 devices (atten-pps3203). > > > > > > sr: [00:00.004540] hwdriver: Scan found 0 devices (baylibre-acme). > > > > > > sr: [00:00.004557] hwdriver: Scan found 0 devices (beaglelogic). > > > > > > sr: [00:00.004567] hwdriver: Scan found 0 devices > > > > > > (bkprecision-1856d). > > > > > > sr: [00:00.004576] hwdriver: Scan found 0 devices (cem-dt-885x). > > > > > > sr: [00:00.004585] hwdriver: Scan found 0 devices (center-309). > > > > > > sr: [00:00.004594] hwdriver: Scan found 0 devices (voltcraft-k204). > > > > > > sr: [00:00.004603] serial: No serial device specified. > > > > > > sr: [00:00.004616] hwdriver: Scan found 0 devices (chronovu-la). > > > > > ... > > > > > > sr: [00:00.100744] hwdriver: Scan found 0 devices > > > > > > (voltcraft-vc960-ser). > > > > > > sr: [00:00.100751] hwdriver: Scan found 0 devices > > > > > > (voltcraft-vc870-ser). > > > > > > sr: [00:00.100758] hwdriver: Scan found 0 devices (voltcraft-vc96). > > > > > > sr: [00:00.100772] hwdriver: Scan found 0 devices (deree-de5000). > > > > > > sr: [00:00.100778] hwdriver: Scan found 0 devices (mastech-ms5308). > > > > > > sr: [00:00.100784] hwdriver: Scan found 0 devices (peaktech-2170). > > > > > > sr: [00:00.100790] hwdriver: Scan found 0 devices (uni-t-ut612). > > > > > > > > > > ^^^ it is trying ... > > > > > > > > > > > sr: [00:00.100796] hwdriver: Scan found 0 devices (peaktech-2165). > > > > > > sr: [00:00.100802] hwdriver: Scan found 0 devices (voltcraft-4080). > > > > > > sr: [00:00.100808] serial: No serial device specified. > > > > > ... > > > > > > sr: [00:00.131195] hwdriver: Scan found 0 devices (zketech-ebd-usb). > > > > > > sr: [00:00.131222] hwdriver: Cleaning up all drivers. > > > > > > The following devices were found: > > > > > > demo - Demo device with 13 channels: D0 D1 D2 D3 D4 D5 > > > > > > D6 D7 A0 A1 A2 A3 A4 > > > > > > > > > > > > > > > Dan > > > > > > > > > > > > > > > > > > > > > > On 25/11/2025 10:43, Dan Horák wrote: > > > > > > > On Tue, 25 Nov 2025 10:28:40 +0000 > > > > > > > Michael A Ray via sigrok-devel > > > > > > > <[email protected]> > > > > > > > wrote: > > > > > > > > > > > > > > > > > > > > > > > Hello all, > > > > > > > > > > > > > > > > I’ve been experimenting with a UNI-T UT612 LCR meter that uses > > > > > > > > the > > > > > > > > CP2110 HID-UART bridge (USB VID:PID 10c4:ea80). > > > > > > > > I’ve built libsigrok and > > > > > > > > sigrok-cli from current master, with HIDAPI > > > > > > > > detected at configure time. > > > > > > > > However, sigrok-cli --scan only shows the demo device, and the > > > > > > > > uni-t-ut612 driver appears to expect a serial port > > > > > > > > (/dev/ttyUSB*). > > > > > > > > > > > > > > please post the output of "sigrok-cli -l 5 --scan", so we get the > > > > > > > verbose logs > > > > > > > > > > > > > > > > > > > > > Dan > > > > > > > > Could someone clarify the current status of HID > > > > > > > > support for the UT612? > > > > > > > > > > > > > > > > • Has HID binding for the UT612 driver been > > > > > > > > merged, or is it still pending? > > > > > > > > • Is there a development branch or patchset I should test? > > > > > > > > • Any guidance on decoding the HID frames directly would also be > > > > > > > > appreciated. > > > > > > > > > > > > > > > > I’d be happy to test experimental code or > > > > > > > > contribute logs from my device > > > > > > > > if that helps move HID support forward. > > > > > > > > > > > > > > > > Thanks for your time and for all the work on sigrok. > > > > > > > > > > > > > > > > sigrok-cli is an absolute Godsend to me as a totally blind > > > > > > > > hacker. > > > > > > > > > > > > > > > > Mike > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > Michael A. Ray > > > > > > > > Software engineer > > > > > > > > Witley, Surrey, South-east UK > > > > > > > > > > > > > > > > He/him > > > > > > > > > > > > > > > > "Perfection is achieved, not when there is > > > > > > > > nothing more to add, but when > > > > > > > > there is nothing left to take away." -- A. de Saint-Exupery > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > _______________________________________________ > > > > > > > > sigrok-devel mailing list > > > > > > > > [email protected] > > > > > > > > https://lists.sourceforge.net/lists/listinfo/sigrok-devel > > > > > > > > > > > > > > > > > > -- > > > > > > Michael A. Ray > > > > > > Software engineer > > > > > > Witley, Surrey, South-east UK > > > > > > > > > > > > He/him > > > > > > > > > > > > "Perfection is achieved, not when there is nothing more > > > > > > to add, but when > > > > > > there is nothing left to take away." -- A. de Saint-Exupery > > > > > > > > > > > > > > > > > > > > > > > > > > > _______________________________________________ > > > > > sigrok-devel mailing list > > > > > [email protected] > > > > > https://lists.sourceforge.net/lists/listinfo/sigrok-devel > > > > > > > > > > > > -- > > > > Michael A. Ray > > > > Software engineer > > > > Witley, Surrey, South-east UK > > > > > > > > He/him > > > > > > > > "Perfection is achieved, not when there is nothing more to add, > > > > but when > > > > there is nothing left to take away." -- A. de Saint-Exupery > > > > > > > > > > > > > > > > > > > > _______________________________________________ > > > > sigrok-devel mailing list > > > > [email protected] > > > > https://lists.sourceforge.net/lists/listinfo/sigrok-devel > > > > > > > > > > _______________________________________________ > sigrok-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sigrok-devel -- S pozdravem Ladislav "Krakonoš" Láska http://www.krakonos.org/ _______________________________________________ sigrok-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sigrok-devel
