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Found 15 results

  1. Hello. I'd like to use open-logger on local, but I'm in trouble because I can't shift to a measurement screen. Digilent-agent and firmware are latest, and PC OS is win10. The problem could be confirmed by more than one PC and browser. How is it settled?
  2. Hello. I got a "offline build waveformslive" and tried it out, but a preservation destination is only chart. Can't it be set as a SD card Logging?
  3. Hi I need some help. I buyed an openlogger board few months ago, but I am starting now to use it. I have some problems. Waveformslives In stream mode may stay connected for hours (some time) or gives error reading data (more frequently). In my application the sampling rate is 1 sample every 10 sec. so quite slow. I tried different settings, but the error is still there. This is the most important problem. During the tests I am doing I noted that some of the configuration saved are listed on the SD, but not available for loading. The logging is on four analog input and the computer is an Asus vivobook S with W10 home. As a browser I use slimjet. I had the same problems with firefox on W7. Regard
  4. Now that there is a means of exporting log files to csv, I have been trying out my device (with firmware 1.3.0). There are some issues that I think still need to be resolved. 1. Advanced tab - "profile": if I store a profile and then restore it later, the settings for the DC power supply are not re-loaded. I am using the DC power supply to power a sensor, so it would be nice for the power setting to be reloaded when I load the saved profile. It also does not load any scaling applied to the analogue channels. 2. Advanced tab - "Log On Boot": This option lets the logger automatically start logging when it reboots. The issue I have is related to the one above - I am powering a sensor with the DC supply, so on reboot, the DC power setting should get restored, but it does not, so the sensor is not powered-up on re-boot. Can we make the power be re-applied on reboot also? 3. Advanced tab - loading profiles. I've saved two profiles. However only one appears in the profile drop-down list menu. I know both are saved because if I go to the "file explorer" button, I can see them stored under the "flash" folder. At one time I could see them both but now I only see one - even after re-booting the openlogger and re-connecting. 4. Scaling: I am scaling my sensor signal by a factor of 50 to convert from Volts to m. I have my sensor connected to Channel 5. The graph always displays "Ch 1" and gives units in "mV" despite the scaling and units I've entered. It should display my channel number correctly and the correct units, but it does not. I can see my signal in the top buffer display, but not on the main chart. 5. Waveform display: Attached is a screenshot showing streaming of channel 5 (without any scaling). Display shows Ch1 (even though channel 1 is not even active). The graph y-scaling seems to be 5mV/div even though for channel 5 it is set to 500mV/div. The true waveform signal is around 723mV, yet the graph axis indicates its about 7mV. 6. I noticed another issue: If I'm logging in log-on-boot mode, and I start waveformslive, when I it launches I can see the data streaming - fine. If I then stop the logging from waveformslive, and go to download, I get error messages and the download fails. I can then not restart logging. So it looks like when in log-on-boot mode, you should use the prog button on the device to stop logging, not waveformslive. Is anyone else seeing the same issues? Could these please be addressed in future firmware releases?
  5. Here's an OpenScope and OpenLogger log file utility that can export to CSV (TODO: JSON). It's written in Python, but the important part (the log file parsing) is portable across about a dozen other languages. https://github.com/bdlow/dlog-utils-portable I've used a combination of the data structure definitions in the Digilent dlog-utils project, some information posted in this forum on the OpenScope data format, and the application of educated guesswork. IMHO this is an improvement over the current version of dlog-utils, which has various log file parameters hard-coded within even though these parameters are specified within the log file header. It's also more portable (Python 3), smaller and of course handles both log types. This work was made possible through the use of the awesome Kaitai Struct project to define the log file structure and automatically generate a Python parsing library from that. Kaitai handles all the details of the log formatting including endianness and data types, and presents the log via a very easy to use Python class. The web IDE makes it very easy to poke around the binary log file. Want to use something other than Python? All you need's the `.ksy` file and you're almost there for any of the languages that Kaitai supports: C++/STL, C#, Go, Java, JavaScript, Lua, Perl, PHP, Python and Ruby. I've a JSON exporting version almost ready, though I probably ought to add some tests first. @Digilent: can you expand on what the channel map is meant to represent? I had presumed it was the channel number to sample index mapping, e.g. if I recorded channels 2, 3 and 7 in the OpenLogger then I'd have expected the data to have three channels in each sample; and the channel map to look like [2, 3, 7, 0, ...]. However my OpenLogger generates log files with a channel map [1, 2, 3]. Bug?
  6. I've been able to use Waveforms live and connect to my OpenLogger through my phone's wifi hotspot in the past. However since I've upgraded firmware to 1.3.0 I have not been able to to this. I now get a message "firmware update required" even though I'm on the latest openlogger firmware. (see screenshot). The blue light is on solid, indicating that I'm connected to wifi. I've also tried connecting through my home wifi network with waveformslive on my computer, and get the same message. Can anyone at Digilent or elsewhere check to see if you can connect via phone hotspot with firmware version 1.3.0? (I also cannot connect via wifi from my PC - I can ping the openlogger, but cannot connect to it...) many thanks - Steve
  7. Hi I've updated my openlogger with latest firmware (1.3.0). A problem that I noticed with previous firmware and which is still present, is that the scaling option will only let you enter one character for your units. There are many units that need more than 1 character, eg mm, Pa, dB, dBA etc so it would be nice to be able to enter more than one character. Once you hit enter you get an "invalid units" message. Is there a trick that I am missing?
  8. Two questions: 1. Supposing I want to use my logger somewhere without a wireless network - is there a way I can have a direct wi-fi connection between my phone and the openlogger? 2. At the moment I can connect to my openlogger through the usb or through wifi, from Waveforms live on my desktop computer. I seem to be able to connect to it from my mobile phone, but I can't launch the instrument panel from teh mobile phone - a "connecting to device" message flashes up on the phone and then nothing happens. Any idea why?
  9. Hi everyone, I found an easy way to read .log file by MATLAB. MATLAB has functions to read binary file but the difficulty is that we are not sure about the header and format of the log data. I am not familiar with Python so the other way that posted by benl using Python is such a pain to me. Here are a few lines that can easily decode .log file with two channels of data: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% Read Data from OpenLogger file close all;clear;clc logfilename = '20190723_9_0.log'; finfo = dir(['F:\' logfilename]); channelNum = 2; %number of channels sampleNum = finfo.bytes/2/channelNum; fileID = fopen(logfilename); logdata = fread(fileID,[channelNum sampleNum],'int16=>int16'); fclose(fileID); headerNum=257; plot(logdata(1,headerNum+1:end),'-'),hold on %channel 1 plot(logdata(2,headerNum+1:end),'-'),hold off %channel 2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% WaveForms Live read in Matlab Note: I don't care about the header info so I just get rid of it. I use random input pulses for ch2; The two plots are not from the same time. peggy
  10. Hi, I am trying to continuously log data. I have logged data to the SD card for more than 20 hours. The experiment result is pretty good: 1. the OpenLogger can continuously work; 2. it can split files automatically 3. the maximum size of a single file is about 3.7GB However, the time of each data file is wrong. Does the OpenLogger have any timing module? I have made it connected to the internet. Is it possible for it to adjust time according to the internet? thanks!
  11. Hi, I use OpenLogger to log data to the SD card. The saved data file is in the format of *.log. I tried to read it out by Matlab but failed. Could you give me some help? For example, what's the format of these data? Does it both include time and voltage? What's the header like? ... Thanks, Peggy
  12. Hi, Since I am just an end-user of the OpenLogger. Hence, I am having a hard time to read a log file to a CSV file based on the instruction of the digilentinc' s instruction. Has anyone succeeded in converting the log file? If so, is there any advice or suggestion that you could give? Could you post a video of converting to CSV on youtube Digilentinc as it is very ridiculous for the OpenLogger to produce a file which can not be read in Matlab?
  13. Hi, 1. What are the power requirements of the board? I am designing a system that requires the OpenLogger to be mobile (not powered by USB micro B via laptop) 2. Where can I get a full schematic of the board?
  14. Further to my struggles here https://forum.digilentinc.com/topic/17957-open-logger-some-basic-doubts/?tab=comments#comment-46282 I must say today was a lucky day ... Yes the OpenLoggerMZ worked as it should with another laptop running WINDOWS 8.1. Using this opp i even upgraded the firmware to 0.1719.0 and all well. Could feed the Wavegen output to CH1 and could see the plot. Atleast the board is still not bricked ... whew !! Then try the same with WINDOWS 10 which is my own laptop. Nothing works . Board connects only in offline mode and even then reports OpenScopeMZ ( see the mess in the reporting .. OSMZ and bottom line reads OpenLoggerMZ) and of course nothing more happens. So its confirmed that this board is not working with WIN10. I even tried to invoke compatibility mode with WIN8.1. No luck
  15. Hi, I am trying to generate a pulse wave instead of a continuous wave which is the default of Waveform Live. Is there a way to do this? I am also having a problem using the math function which is located in the bottom right of the browser, It freezes the site when it is selected.