viewtouch
gnuradio
viewtouch | gnuradio | |
---|---|---|
12 | 22 | |
156 | 4,796 | |
2.6% | 0.7% | |
0.0 | 9.4 | |
over 1 year ago | 5 days ago | |
C++ | C++ | |
GNU General Public License v3.0 only | GNU General Public License v3.0 only |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
viewtouch
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POS for a small restaurant
Created a long time ago by a really cool Redditor: https://www.viewtouch.com/
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W. Richard (Rich) Stevens
I am a software development manager. I have purchased and awarded every software developer whom I didn't fire after a week or two with a complete set of the books authored and typeset by W. Richard Stevens. My code, GPL'd nearly ten years ago, represents my life's work and is replete with the code found in Rich Stevens' books. I am very proud that I was able to help the programmers I hired to be better programmers and to help them write better code because they were able to rely upon what Rich Stevens was able to pass on to them.
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Local BBQ chain. Simple menu display.
And why are they not running [Point of Sale on Raspberry Pi](https://www.viewtouch.com) ?
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Pi400 running dual 15.6' touchscreen in car entertainment system.
Chipsee makes an [all in one 15.6 display](http://www.viewtouch.com/) which will do this much more easily, much more attractively and at less cost than this.
- What's the best POS to use for a restaurant?
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/u/EugeneMosher describes creating Point of Sale system and improvements made over the years
Per his website it would appear he did, as "ViewTouch provides 24/7 phone support and training, updates and backup." So, you know, good, but why not just mention "Yeah I'm doing this through my company that does in fact provide support" rather than "I've been doing this for 35 years"? What am I meant to take from that other than "My software doesn't go down" which sends the message that he's not planning for failure. The worst part of this, then, is that that's not actually the case and this was an opportunity for him to advertise his business rather than just dribbling his highly-experienced balls in the guy's mouth.
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I created this point of sale system for restaurants and hospitality. The All-In-One has a 15.6" touchscreen running a Raspberry Pi Compute Module 4L and is made by Chipsee in Bejing, China. I'm helping a friend install it in a restaurant on the St. Lawrence River where he is the Executive Chef.
I didn't realize the code was GPL but just found it at https://github.com/ViewTouch/viewtouch, which has lots of information. Awesome!
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POS system using QT (SQLite Embedded & Azure SQL sync)
The source code is available via https://github.com/ViewTouch/viewtouch
- It’s been fourteen years since the first touch screen phone was introduced, and we still can’t accurately tap a body of text where we want to make an edit or correction in what we typed.
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Are there actually any software that's free as in freedom but not free as in beer?
ViewTouch point of sale offers the use of the software at no cost but does charge $49 a month for 24/7 support.
gnuradio
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Upsampling in Gnuradio is necessary?
In gr-dtv transmitter examples for Gnuradio, I see some times people use a resampler block before the RF hardware sink. Say our sampling rate is ~9.14Msps which satisfies the Nyquist criterion because our samples are complex numbers.
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Capturing FM using SDR
2.1. Thanks for that tip, I forgot that I was able to check the source code of the WBFM Receive block. As you have said, there are mostly the same. There are some differences between how values are picked. The WBFM Receive block would be a synonym of Quadrature demod => Fir Filter (decimation => Low pass filter) => FM Deemphasis. 2.3. My question there is why 10 and not 20 or 100. I understand that the idea is to reduce the sample rate asap, but what I don't understand is why those values were picked and how can I understand what would be the "correct" or "best" value. 2.4. I'm not fully understanding what you said. If I check the WB FM recieve source code the values that are supplied as the cutoff freq and transition width of the Low pass filter differ from the one of the example. The webfm would apply a sample rate / decimation / 2 - sample rate / decimation / 32 as a cutoff freq and a sample rate / decimation / 32 as a transition transition width. Calculating those values would end up in different that the ones supplied in this second example. Again, is there a rule of thumb to pick these values?.
- Hello everyone! I would like to install and run GNU Radio version 3.7.4 in order to follow along with The HackRF GNU Radio tutorial on greatscottgadgets.com/sdr/ but I can’t find prior releases to install. Can anyone help?
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Multi band gfsk demodulation with Nooelec RTL-SDR v5 SDR and gnu radio
Gaussian filter is used only on the tx side, so specifying bt in the receiver makes no sense. Take a look at gfsk mod/demod blocks implementation: https://github.com/gnuradio/gnuradio/blob/master/gr-digital/python/digital/gfsk.py
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What would you rewrite in Rust?
GNU Radio
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Is there a way to delay a signal in time-domain?
Here's the filter coefficients used for the GNU-Radio interpolator block to get you started. This is a 7th order interpolator (i.e., 8 FIR taps) with very good performance. Each "row" of the array sets the delay in steps of sample_time / 128.
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My grandpa is a huge HAM radio fan, so I showed him GNU Radio. Got this text the day he got back home.
From their README: “open-source software development toolkit that provides signal processing blocks to implement software radios.” https://github.com/gnuradio/gnuradio
- The future is now ... again
- GNU Radio
- GNU Radio – the Free and Open Software Radio Ecosystem
What are some alternatives?
shapez.io - shapez is an open source base building game on Steam inspired by factorio!
PothosSDR - Pothos SDR windows development environment
materials - Bonus materials, exercises, and example projects for our Python tutorials
SDRPlusPlus - Cross-Platform SDR Software
SQLite-sync.com - AMPLI-SYNC is a framework for synchronizing data between a Sqlite database and an MS SQL/MySQL/Oracle/PostgreSQL database. With this framework your application can work completely offline (Airplane Mode), then perform an automated Bidirectional Synchronization when an internet connection becomes available.
Node RED - Low-code programming for event-driven applications
OpenPapyrus - Sophisticated ERP, CRM, Point-Of-Sale, etc. Open source now. This system is developed since 1996.
gnss-sdr - GNSS-SDR, an open-source software-defined GNSS receiver
CnC_Remastered_Collection
sdrangel - SDR Rx/Tx software for Airspy, Airspy HF+, BladeRF, HackRF, LimeSDR, PlutoSDR, RTL-SDR, SDRplay RSP1 and FunCube
srsRAN_4G - Open source SDR 4G software suite from Software Radio Systems (SRS) https://docs.srsran.com/projects/4g
CubicSDR - Cross-Platform Software-Defined Radio Application