Dear Stack Overflow community,
I'm working on a project that will have many different sensors in complex of few building, I would like to cover whole place with sensors. The application requires all these microcontrollers to send the data to the local master microcontrollers. From the local master microcontrollers the data must go to desktop PC via serial connection and from there to a server in the cloud.
I looked at 2.4Ghz modules, but due to being indoor I'm leaning more to sub 1Ghz range. From my online research I conclude that there are two main players; Digi with XBee Pro and Synapse Wireless with Snap. Are there any other manufacturer that I should look at?
Both Digi and Synapse drvices support 2.4Ghz and 900 Mhz ranges, for low bandwidth indoor usage 2.4Ghz is not an option, so 900 Ghz it is.
Both USA and EU have 900 Mhz ISM band, EU is 868 Mhz and USA is 915 Mhz.
Has anybody compared indoor range Xbee Pro vs Synapse Snap on 915 Mhz or 868 Mhz ?
Which one is easier to implement and deploy with sensors and microcontrollers ?
Related
I just bought a new Lenovo Ideapad 5 pro 16ACH6 with windows 11. Immediately noticed that wi-fi speed was incredible slow. The network adapter is Qualcomm Atheros QCA61x4A. I run the speed test, it starts with 30 Mbps and slows down to 10 Mbps. On my other devices speed test comes out to 200Mbps from the same location.
Link speed : 866/866 (Mbps)
I tried to update drivers and the other solutions what I found on the forums, but the problem was not solved.
It's often something with the router. Try rebooting the router and if issue stays check by connecting to another network.
I have had created VM instances using google cloud platform (using console). The VM is a based on WINDOWS SERVER 2019! I have been successful in making one but unable to get some virtual ram in the instances. It (VRAM) shows zero. Does adding GPU not increase the vram? If not then what increases them? I am looking to increase the same for gaming purposes and using software like ADOBE AND AUTODESK too...
Instances created with additional GPU's (Like Tesla K80 and other) have all specified amount of GPU memory (VRAM).
You can find list of all GPU's in the documentation.
Every GPU has an amount of memory specified in the table.
If you create a VM with one K80 GPU it will kave 16GB of DDR6 memory available (nothing to do with the type of the machine or actual RAM assigned).
You can find how much of VRAM a GPU has in the Device manager; find "Display adapters" and expand it and find your card; it's all in the "general" tab.
And regarding any Adobe or Autodesk software I can't really tell if having Tesla will be of advantage..
My development machine has a 128G SSD. I recently upgraded to VS2013 Ultimate, and found that it ate 7.3G of it. In comparison, my VS2010 takes up just over 500M.
I cannot imagine why this is so much larger, and suspect I have a bunch of stuff on here I don't need. Does anyone have any way to characterize where that space is going, and what I might be able to do to get some of it back?
No, you cannot.
Per the Microsoft website, VS 2013 requires 20GB.
Hardware requirements
1.6 GHz or faster processor
1 GB of RAM (1.5 GB if running on a virtual machine)
20 GB of available hard disk space
5400 RPM hard disk drive
DirectX 9-capable video card that runs at 1024 x 768 or higher
display resolution
I am surprised that you're around 7GB
Maybe you should look at VS2013 Online Advanced, if you're really interested in HD space:
Hardware requirements
1.6 GHz or faster processor
1 GB of RAM (1.5 GB if running on a virtual machine)
5 GB of available hard disk space
5400 RPM hard drive
DirectX 9-capable video card running at 1024 x 768 or higher display
resolution
I Google so that you don't have to™
I'm looking to replace a hardware mixer with software, to increase the flexibility of our system and reduce hardware complexity
We have 4-8 server-class PCs (Windows 7) connected in a local LAN via gigabit Ethernet.
Each PC has a USB sound card which is connected to an 8-input mixer.
The output from the mixer is sent to speakers in a few places.
What I'd like is change is:
route the sound over the network instead
each computer should can thus listen to all others and output it's own "mix"
less cables
If possible, support for really cheap hardware (i.e. raspberry pi or something)
There is no hard requirement on latency and such. Up to 100 ms is acceptable (i.e. way higher than your average quake ping...).
While I prefer open source, I'm also open to redistributable commercial solutions, for this to be economically viable, the license costs can't exceed 30-40 €/server. (Preferrably less..)
Grateful for all help!
(Please also share you experiences if possible, not just post links..)
Related question:
https://stackoverflow.com/questions/4297102/how-to-create-a-virtual-sound-card-on-windows <- doesn't seem to interconnect over network
I'm the Accurev administrator at work. I have one of my users on Mac OSX that is having really bad performance - it takes about 45 seconds between launching the app and displaying the login screen. It takes 8 seconds to run "accurev info". Our server is version 5.3a and the client is version 5.3b. We had the same issue on version 4.7. We opened a support case a month ago and have had a lot of back and forth.
Here's the hardware information
Model Name: iMac
Model Identifier: iMac11,3
Processor Name: Intel Core i7
Processor Speed: 2.93 GHz
Number Of Processors: 1
Total Number Of Cores: 4
L2 Cache (per core): 256 KB
L3 Cache: 8 MB
Memory: 8 GB
Processor Interconnect Speed: 4.8 GT/s
Boot ROM Version: IM112.0057.B00
SMC Version (system): 1.59f2
Here's the output from "accurev diag"
Basic CPU : 108233.76
Host name resolution : 286.69
Memory : 582.40
Guaranteed disk write : 135.52 MBytes/sec
Network read : 11.20 MBytes/sec, 11472.14 KBytes/sec
Available network bandwidth is equivalent to typical 100Mbit LAN
Network write : 10.72 MBytes/sec, 10973.83 KBytes/sec
Available network bandwidth is equivalent to typical 100Mbit LAN
All other application are really quick on this machine. I have a Macbook Pro with an i7 and 4GB Ram and accurev works great on it. That said, I'm not a Mac expert.
I'm at a loss and this user is really becoming frustrated. Do any of you have suggestions?
Thanks in advance for reading this question.
Could you post the support case ID so I could look into the history? My first inclination would be to isolate if it's the accurev client in general or limited to the Java GUI. How long does it take run commands like "accurev show -fx depots" from a command shell, compared to opening the list of depots in the GUI, for example?
If it turns out to be the AccuRev client in general, is it possible that there is some kind of duplexing going on from the client machine over the network? I've seen this happen via VoIP phones. The "accurev diag" output makes this seem less likely though. Have you tried having them delete their "preferences.xml" file that lives in the user's .accurev directory under their home directory?
Just some thoughts...
~James