hybridfree/eevblog-posts huggingface dataset:
Simple Python Based 8085 Assembler - Page 1
Forum section: electronics / general

author: Omega Glory
author_rank: Regular Contributor
timestamp: December 28, 2019, 08:27:16 pm
content: While working on building a robot doghttps://www.eevblog.com/forum/projects/1970_s-robot/a few years back, I decided to start writing an assembler for the 8085 processor which controlled the project. While there were multiple free assemblers and simulators available, they either did not run on my operating system, or did not produce an output which was then easy to load into my robot's memory, so I decided to write my own assembler in Python which had a customizable output format. While I have had it working well enough for my own needs for a few years, I decided to update it, and write some documentation, incase anyone else needed it for a similar project. You can find it on GitHub at:https://github.com/ept221/8085-Assembler
router firmware reverse engineering - need help - Page 1
Forum section: electronics / general

author: pant3k
author_rank: Newbie
timestamp: November 04, 2019, 12:12:23 pm
content: Hello,I'm trying to see what's inside DI-524 firmware.CPU RDC2600 also know as AMRISC 10100(probably x86 arch).Binwalk found nothing usefull. File doesn't have any common compression.Jtag doesn't work(probably somehow disabled) tdo with 0V(got 3.3 when firmware is crashed, but it doesn't help anyway).Dumped full flash with TL866II Plus in radare2:type biosclass 1.0arch x86bits 16machine pcendian little........type biosarch pcbits 16endian littleAny hints?

author: amyk
author_rank: Super Contributor
timestamp: November 04, 2019, 12:59:10 pm
content: Post a link to a firmware dump and someone may take a look at it.

author: pant3k
author_rank: Newbie
timestamp: November 04, 2019, 01:35:40 pm
content: Flash file.

author: PA0PBZ
author_rank: Super Contributor
timestamp: November 04, 2019, 07:58:16 pm
content: Doesn't look compressed, what are you looking for?

author: pant3k
author_rank: Newbie
timestamp: November 04, 2019, 11:15:28 pm
content: Only some files are in plain. I need firmware assembler code, system files etc.
What is the mathematical name for a 'circle sector' applied to a 'ring'? - Page 1
Forum section: electronics / general

author: 741
author_rank: Frequent Contributor
timestamp: October 18, 2019, 01:04:37 pm
content: I'm drawing a graphic which is like a doughnut chart. If we call the shape between 2 concentric circles a 'ring', what is the correct term for a 'partial ring'?(I'd like to give the relevant variables meaningful names, preferably based around mathematically correct terms)

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 18, 2019, 01:28:07 pm
content: just google "partial donut shape mathematics"Annulus SectorAnnulus (Mathematics)

author: 741
author_rank: Frequent Contributor
timestamp: October 18, 2019, 02:25:05 pm
content: OK Thanks, it seems the term is going to be "Annular Sector".

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 18, 2019, 02:34:36 pm
content: The "correct" math term would be annulus sector, but I admit this doesn't sound very appealing for some reason, so I'll concede the annular sector.

author: 741
author_rank: Frequent Contributor
timestamp: October 25, 2019, 08:49:15 pm
content: That was my intuitive feeling, but I must (now) admit "annular sector", whilst sounding nicer, is a contradiction: Like saying "circular sector". A sector cannot be itself circular or annular I suppose.

author: Nominal Animal
author_rank: Super Contributor
timestamp: October 26, 2019, 03:07:03 am
content: I admit, the first thing that came to my mind was "sphincter". But yeah,annulusit is.

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 26, 2019, 02:27:35 pm
content: Quote from: 741 on October 25, 2019, 08:49:15 pmYeah, it didn't sound this weird to me at first (due to this not being my native language), but it is. It's not exactly a contradiction I'd say, more like a definition turned upside down.But yeah, "annulus" frankly sounds horrible.Even if it's probably less correct, and more informal, wouldn't "ring sector" be appropriate, and sound better?

author: SL4P
author_rank: Super Contributor
timestamp: October 27, 2019, 02:06:22 am
content: I’ll throw ‘arc’ into the discussion!

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 27, 2019, 06:09:19 am
content: really, whats wrong with Annulus? its not like Annalus and Annalar wont solve anything... there will be always something to talk, move on!...Quote from: SL4P on October 27, 2019, 02:06:22 amarc is a "curvular" line of zero area.https://en.wikipedia.org/wiki/Arc_(geometry)whatever
Multimeter details to extract data in real time - Page 1
Forum section: electronics / general

author: johnfriend
author_rank: Newbie
timestamp: October 21, 2019, 01:52:27 pm
content: Hi,I am from India.I want to extract the real data from multimeter/ clamp meter using python module.Can anyone help me themodeland pythonscriptto extract ( voltage, current)ThanksRegardsJohnson
B4A Basic for Android is now free - Page 1
Forum section: electronics / general

author: chris_leyson
author_rank: Super Contributor
timestamp: March 10, 2020, 11:04:38 pm
content: Basic for Android is now free, just add the Android SDK and you've got a VB-like development platform for Android. B4J (Java) and B4R (Arduino) are also free as well. I haven't used B4A in a long while and a lot has changed so I've got some catching up to do. Thanks Erelhttps://www.b4x.com/
Peter Fleury LCD library - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: October 07, 2019, 08:04:49 pm
content: http://homepage.hispeed.ch/peterfleury/doxygen/avr-gcc-libraries/group__pfleury__lcd.htmlwhich of the functions listed at the bottom am I using to send a number or rather a variable value?void lcd_data ( uint8_t data ) ?

author: madires
author_rank: Super Contributor
timestamp: October 07, 2019, 08:21:29 pm
content: That library doesn't include a function to display a number. So you have to convert the number/value into a string first, and then call lcd_puts() to display the string.

author: Simon
author_rank: Unknown
timestamp: October 08, 2019, 07:15:13 am
content: Ah, I thought so. So I need to do something like keep dividing the number by 10 to get each digit and then add the values to the ASCII code for "0" so that I send the digits in ASCII to the screen.

author: Whales
author_rank: Super Contributor
timestamp: October 08, 2019, 07:43:06 am
content: Depending on what micro & development environment you are using: you may also have access to some form of standard library with sprintf()/snprintf() or similar.

author: Simon
author_rank: Unknown
timestamp: October 08, 2019, 08:21:46 am
content: Atmel studio

author: madires
author_rank: Super Contributor
timestamp: October 08, 2019, 08:34:03 am
content: Quote from: Simon on October 08, 2019, 07:15:13 amYep, or use a library function like ultoa() (https://www.microchip.com/webdoc/AVRLibcReferenceManual/group__avr__stdlib_1ga34f41757388f40e340f31e370ac009b5.html).

author: Simon
author_rank: Unknown
timestamp: October 08, 2019, 04:44:15 pm
content: As always, near 0 instructions..... I am fairly comfortable with the mechanism to convert a variable to ascii codes but i suspect i need to play pointers to get a string, I have the book for that now.

author: maginnovision
author_rank: Super Contributor
timestamp: October 08, 2019, 07:14:47 pm
content: I do something like this...Code:case lcd.write_line(char* alias data, int line): {lcd_setcursor(1, line, rs, e, data_port);string_len = strlen(data) > COLUMNS ? COLUMNS : strlen(data);str_len = string_len > MAX_PRINT ? MAX_PRINT : string_len;//Send data to LCDfor (size_t i = 0; i < str_len; ++i)lcd_write(data, rs, e, data_port);//Make sure no extra chars draw, copy stringfor (size_t i = str_len; i < MAX_PRINT; ++i) lcd_write(SPACE, rs, e, data_port);strcpy(lcd_data, data);//Reset scrolling logicif (line == cursor_line) {LCDTIMER :> last_scroll;start_char = roll_time = 0;}break;}
Source Code Repositories... - Page 1
Forum section: electronics / general

author: westfw
author_rank: Super Contributor
timestamp: October 01, 2019, 02:15:42 am
content: Are there any online source code repositories (like github) that include some code-browsing features beyond syntax-coloring?I'd particularly like "goto defintion." It would be fine if I have to use an offline tool to manually build the index...

author: Nusa
author_rank: Super Contributor
timestamp: October 01, 2019, 02:43:13 am
content: That's the sort of feature that's normally handled by downloading the code and looking at it via your preferred editing environment. The online viewing tools for github aren't really intended for serious digestion of the code.

author: SparkyFX
author_rank: Frequent Contributor
timestamp: October 01, 2019, 03:18:22 am
content: The question kind of overlaps with code documentation, there aredocumentation generatorsthat might provide the function you search for. If it ends up in the repository, it might still be browseable.

author: ataradov
author_rank: Super Contributor
timestamp: October 01, 2019, 05:06:24 am
content: There are a number of Linux kernel cross reference sites.https://elixir.bootlin.com/linux/latest/sourceis one of them.But yeah, it is easier to download stuff from GitHub rather than look for a sire that has the code you want to look at.

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 01, 2019, 06:22:06 pm
content: Well, if you're fine with using an offline tool, as said above, just use one?Some editors allow to directly manage repositories (such as git and others) directly from within them, so that makes it easier than downloading the source code manually if you so wish. But of course the code will still be downloaded. And many of them have more than syntax coloring.As Sparky said, othewise, doc generators will pretty much do what you seem to want. Doxygen is very well known here. There are others.

author: Sal Ammoniac
author_rank: Super Contributor
timestamp: October 02, 2019, 04:36:56 pm
content: Quote from: westfw on October 01, 2019, 02:15:42 amI doubt you're going to find anything like this. The two biggest players, GitHub and BitBucket, certainly don't support it. Unless the repository is huge and you have limited bandwidth, the simplest thing to do is clone the repo locally and browse it with VSCode, Sublime, etc.

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 02, 2019, 10:11:49 pm
content: Yeah, unless you set up your own server with only your own projects, analyzing code for millions of projects would be an almost impossible task for those public repositories... just think about it...
Help : Pedal Assist Algorithm - Page 1
Forum section: electronics / general

author: redgear
author_rank: Frequent Contributor
timestamp: October 01, 2019, 05:02:51 am
content: Hey all,I am a beginner into the world of programming. I am trying to learn by starting to do projects. Right now I'm planning on coding a Pedal Assist system for my bike and flash it to some micro processor to deploy it on my bike....I am confused and idk how I should approach writing a algorithm for this.Would be great if you guys can helpThanks!

author: Sal Ammoniac
author_rank: Super Contributor
timestamp: October 02, 2019, 04:39:16 pm
content: You're going to have to give us more details on what you're trying to do before anyone is going to be able to help. Start by describing the hardware and what the code running on the MCU is supposed to do.

author: redgear
author_rank: Frequent Contributor
timestamp: October 16, 2019, 05:28:21 am
content: Quote from: Sal Ammoniac on October 02, 2019, 04:39:16 pmHey, Sorry for the very late reply. I have been busy lately.I haven't decided on the MCU yet. I will open to suggestions.I have a hall sensor that detects the rpm in which the biker pedals. This is converted to a analog signal. What I am trying to do is to write an algorithm that will provide assist(motor power) in relation to the biker's rpm. The amount of assist should be adjustable upto 3 levels.Thanks
ParaSail - Page 1
Forum section: electronics / general

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 05, 2019, 11:56:36 pm
content: Time for a new language.https://adacore.github.io/ParaSail/I actually found this pretty interesting. The ref manual is 60 odd pages only. I rather like the language itself, which is rare enough to be mentioned. Of course it has clear ADA origins, but is at the same time leaner.Played with the interpreter and compiler a little. Nice stuff, but whereas the language itself is rather lean (yet powerful), it's so complex to compile that the compiler is a monster, and the runtime also is.It's so monstrous that, even though every bit of your code gets heavily parallelized with very little effort, the actual performance is disappointing.Still, something new to look at, that I hadn't heard about a lot. (And yes, as Knuth himself said, when something is too popular, I tend to become overly cautious about it)

author: Stray Electron
author_rank: Super Contributor
timestamp: September 06, 2019, 07:32:53 pm
content: Quote from: SiliconWizard on September 05, 2019, 11:56:36 pmWell that's disappointing. Since ParaSail is written in ParaSail, I thought that it would be more Forth like.

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 06, 2019, 08:26:46 pm
content: Quote from: Stray Electron on September 06, 2019, 07:32:53 pmParaSail is slightly more complex than Forth.Feel free to try and experiment though.

author: westfw
author_rank: Super Contributor
timestamp: September 07, 2019, 08:31:21 pm
content: Hmmph. Not related to SAIL...

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 13, 2019, 04:08:40 pm
content: Hmm, doesn't seem to have "sparked" much interest... Maybe Adacore should start a "Make with ParaSail" contest...
STM32 logic analyzer for peripheral registers - Page 1
Forum section: electronics / general

author: Chris Mr
author_rank: Regular Contributor
timestamp: September 25, 2019, 05:35:11 pm
content: Hi,I've been trying to get to the bottom of of how an STM32 peripheral works and came up with this idea for making an "internal logic analyzer".Ok, you don't drill little holes and attach leads but whilst it's not a real logic analyzer it just answered all the questions I had so I though I would give it a mention.This is basically it.. (you have to make it run with whatever you want it to)First, run the CPU at maximum clock rate, then turn the peripheral clock rate down to as slow as it will go (divide by 64 or more compared to the CPU). Next set the systick reload to something longer than the expected time between events of the register you are looking at - I did 10ms.Now you write a little function that you pass the last contents of the register you want to look at, and sit in a tight loop waiting for it to change. When it changes, save the current time and pass it back to the control code, which responds to the change and goes back to waiting for things to alter again. The loop also stores the register contents so you can spool it out later, just like a logic analyzer.void Grab( Original)do{New = *Register} while( New == Original);Hope it helps someone
Need help reversing CRC Algorithm - Page 1
Forum section: electronics / general

author: Rerouter
author_rank: Super Contributor
timestamp: September 06, 2019, 11:23:56 am
content: Trying to reverse engineer the communications protocol between 2 serial devices, but coming a little unstuck with how exactly the CRC is implemented, a few hints say its something like CRC16 CCITT-FALSE, (0x1021 Poly, 0xFFFF initial, possibly reflected) but I am not able to calculate a matchI have some example Data, The end is a 16 byte CRC and 0x7E as the end of packet character,0x7E 43 E7 80 7E0x7E 44 58 F4 7E0x7E C3 01 0C FE 7E0x7E C5 03 Ce 89 7E0x7E C3 02 3D 00 00 00 74 2D 7EI can also source many more examples if needed, Anyone have any tricks on how to figure it out?

author: nfmax
author_rank: Super Contributor
timestamp: September 06, 2019, 11:38:04 am
content: Seehttps://www.eevblog.com/forum/projects/unable-to-figure-checksum-algo!/msg1446027/#msg1446027

author: Psi
author_rank: Super Contributor
timestamp: September 06, 2019, 12:19:05 pm
content: I'm assuming that initial 7E is the end of frame marker from the previous packet. So I have removed it.Anyway, whatever that initial 7E is, it's not part of the data block being CRC'ed because once you remove it CRC-16/X-25 matches up nicely.43 = E7 8044 = 58 F4C3 01 =0C FEC5 03 =Ce 89C3 02 3D 00 00 00 =74 2DUsehttps://crccalc.com/Switch it to hex modePaste in the hexClick CRC-16Note: high and low are reversed for output.etc, for input C3 02 3D 00 00 00 that website givesAlgorithm Result Check Poly Init RefIn RefOut XorOutCRC-16/X-250x2D740x906E 0x1021 0xFFFF true true 0xFFFFI checked a couple of others and they also worked, so it's definitely X-25

author: Rerouter
author_rank: Super Contributor
timestamp: September 06, 2019, 08:31:35 pm
content: Thank you very much Psi,The 7E's are separate start and end of frame markers, so its a little odd that its not in the CRC. but this was the main puzzle piece left so now I can start fuzzing the thing.

author: Psi
author_rank: Super Contributor
timestamp: September 07, 2019, 07:46:28 am
content: Quote from: Rerouter on September 06, 2019, 08:31:35 pmI guess the Start Of Frame marker doesn't need to be CRC'ed, because the code only processes the frame when it detects the marker.Any error in that byte and the data will be ignored anyway.

author: bsdphk
author_rank: Regular Contributor
timestamp: September 07, 2019, 06:02:03 pm
content: Be aware that 0x7e as a SOF/EOF marker almost always an indication of HDLC(-like) framing.That can be done a number of ways, but common for them all is that they need to escape databytes of 0x7e so they do not get misinterpreted as EOF.True HDLC is bit-serial protocol and it does bit-stuffing.HDLC over byte-serial lines need to pick an escape-character which escapes not only 0x7e, but also itself, and maybe other "special" characters. (Prudent: escape XON and XOFF on async lines).
Algorithms and Patterns for implementing an ICE Processor Emulator - Page 1
Forum section: electronics / general

author: obiwanjacobi
author_rank: Super Contributor
timestamp: August 26, 2019, 05:22:39 am
content: I am trying to implement a Z80 ICE emulator to run in a PSoC5 and have the beginnings of the code working.However I have some questions about the correctness of my approach and created a StackOverflow post for it.https://stackoverflow.com/questions/57643974/what-algorithms-and-or-patterns-to-use-for-an-in-circuit-processor-emulator-z80To be clear: this is software that exactly tries to behave like a real Z80. It changes state on every (half) clock-cycle. It activates signals (RD/WR/MEMREQ etc) at the correct places in time etc.Please chime in if you have any experience writing this kind of software or know any theory.https://github.com/obiwanjacobi/Zingularity/tree/master/Source/Jacobi.CpuZ80
Interactive 3D shapes for webpages - Page 1
Forum section: electronics / general

author: RoGeorge
author_rank: Super Contributor
timestamp: August 23, 2019, 10:56:14 am
content: Firefox was able to play this interactive 3D model without asking for plugins:https://www.quantamagazine.org/random-surfaces-hide-an-intricate-order-20190702/I want to make such interactive models that can be played offline in any web browser.What technology/format was used there?Any free and offline/standalone tools that can do interactive 3D models, please?

author: Berni
author_rank: Super Contributor
timestamp: August 23, 2019, 12:50:28 pm
content: This is possible trough HTML5 with things like WebGL. This is basically OpenGL for browser scripting languages like JavaScript.If you don't want to get into nitty gritty of web programing you can make use of Raylib:https://www.raylib.com/examples.htmlIts a simple C language wrapper for OpenGL that makes it easy to write hardware accelerated applications for lots of platforms and can be compiled into web assembly and WebGL. The examples on his website will work fine offline if you get all of the required files.

author: Jeroen3
author_rank: Super Contributor
timestamp: August 23, 2019, 01:26:28 pm
content: Wordpress has some plugins for 3D models. They load a step file or stl file.But your examples uses sketchfab.https://sketchfab.com/models/b55dbb8498ea497e98817a3900a2be25/embed?camera=0&autospin=.01&autostart=1Offline is tricky, but you can always run your a local webserver.
USB performance monitors - Page 1
Forum section: electronics / general

author: westfw
author_rank: Super Contributor
timestamp: June 26, 2019, 12:53:28 am
content: I'm looking for modified USB drivers for a PC/Mac/Linux system that will give me information useful for optimizing the performance of microcontroller-side USB code.I think I've seen "trace" code that provides really detailed information about everything that goes on, which is probably useful for debugging the actual driver logic, but in this case I'm more interested in something that will tell me stuff like "average message size over 1MB was 64bytes instead of 2bytes! Good for you!", which should be easier (?)

author: kamtar
author_rank: Regular Contributor
timestamp: June 26, 2019, 11:12:13 pm
content: I doubt that there is something like that. But Wireshark with USB capture should be more than usable for your needs.

author: Nominal Animal
author_rank: Super Contributor
timestamp: June 27, 2019, 10:30:33 am
content: There isusbtopfor Linux. I don't think it has a USB packet size histogram, but adding one shouldn't be too difficult.Personally, I tend to use the full dump instead.

author: mrflibble
author_rank: Super Contributor
timestamp: July 16, 2019, 07:01:47 pm
content: You could useusbmon+ some scripting. Or for a more general solution you could use BPF through a suitable frontend. See for example theBPF Compiler Collection. BCC contains all sorts of handy performance measurement tools. Theshow-pretty-histogram-for-filesystem-performancetools in there might get you close enough. Or you could use dtrace. The following links give a good overview:http://www.brendangregg.com/ebpf.htmlhttp://www.brendangregg.com/blog/2016-10-27/dtrace-for-linux-2016.html
Neural nets / Deep Learning and so on. - Page 1
Forum section: electronics / general

author: hamster_nz
author_rank: Super Contributor
timestamp: July 10, 2019, 11:30:32 pm
content: If you want a nice gentle introduction to the tech, have a look at this vid:You might think it starts off slow, but is just very well paced.It's part of a longer playlist athttps://www.youtube.com/playlist?list=PLZHQObOWTQDNU6R1_67000Dx_ZCJB-3pi

author: windsmurf
author_rank: Frequent Contributor
timestamp: July 11, 2019, 07:58:30 pm
content: Thank you that's a good video.After watching that, if anyone decides they want to try coding a NN, this is an excellent tutorial:https://gluon.mxnet.io/index.html
Mathematical model of an ideal capacitor - Page 1
Forum section: electronics / general

author: krayvonk
author_rank: Regular Contributor
timestamp: July 06, 2019, 02:53:40 pm
content: Im looking on the net for one so I can code a circuit simulator, anyone can help with a link or short tutorial?

author: ahbushnell
author_rank: Frequent Contributor
timestamp: July 07, 2019, 01:03:56 am
content: The voltage on the capacitor is the integral of the current divided by the capacitance from 0 to the present time plus add the initial voltage on the capacitor.https://en.wikipedia.org/wiki/Capacitor#OverviewOr find a basic book on circuit theory.While your at it you can model an inductor.The current is the integral of the voltage across the inductor from 0 to the present time.

author: IanB
author_rank: Super Contributor
timestamp: July 07, 2019, 01:18:57 am
content: Quote from: krayvonk on July 06, 2019, 02:53:40 pmThis is very elementary, so I am unsure how you can code a circuit simulator without any apparent knowledge of electronic circuits or physics?But leaving that unfortunate complaint aside, an ideal capacitor has the following model. Bear in mind that no real capacitor obeys this model, and using such a model may lead to odd results.$$i=C {\mathrm{d}v \over \mathrm{d}t}$$
Researcher / Investigator - Page 1
Forum section: electronics / general

author: tytower
author_rank: Contributor
timestamp: June 26, 2019, 01:05:28 am
content: I'm looking for an investigative researcher extraordinair. Someone with skills in unix linux security firewalls etcThe pay is tops and annonimity assured.Along the lines of "Girl with the dragon tattoo" stylebut the tattoo is optional !Surprise me.
Loss of Wireless After Windows 11 Upgrade - Page 1
Forum section: electronics / general

author: med6753
author_rank: Super Contributor
timestamp: September 19, 2025, 07:58:26 pm
content: Finally bit the bullet and upgraded my Acer Aspire E15 to Windows 11. Everything went smoothly but I discovered that the laptop no longer "sees" the wifi from the Netgear Nighthawk RAX54v2 modem. Itdoessee and connect to my wifi extender...and those signals originate from the Netgear modem. It also sees all my neighbors wifi signals. I tried rebooting both the laptop and modem which was no help. The modem is working fine. Other devices are connected with no issues. I enabled the Guest on the modem and the laptop doesn't see that either. I found the Win11 allows you to reset the network devices back to factory but that didn't help. Anyone have an idea as to what the issue is?

author: Whales
author_rank: Super Contributor
timestamp: September 19, 2025, 10:21:59 pm
content: Q1. What frequeuency/bank is the AP running at? Can you give theexactfreqs or channel numbers? It's probably running two different freqs (one near 2.4GHz and one near 5Ghz).Some freq bands are region-specific, and a "properly" configured wireless card will refuse to use locally banned frequencies (which might also mean it refuses to scan them, due to how it has to tune to every freq sequentially for scanning). In practice this is haphazardly enforced.Q2. What encryption mode is the AP running at? WPA2, WPA3 or a hybrid mode?Q3. Exactly what model of wireless card is in your computer?

author: vk6zgo
author_rank: Super Contributor
timestamp: September 19, 2025, 11:09:39 pm
content: I have a similar problem following a W11 upgrade, but in my case, every now & then, W11 turns Wi-Fi off!It can be reconnected, but as in your case, there seems to be no way to stop it recurring.

author: Halcyon
author_rank: Unknown
timestamp: September 21, 2025, 10:50:01 am
content: Are you running WPA3 on your network? (If so,goodbut...)I have come across issues during initial set ups on both PC-based and Mac devices where WPA3 networks don't connect properly, but after the OS boots fully, it works fine.Maybe Windows 11 has a screwed up driver for your WiFi adapter? Maybe try dropping back to WPA2? Also, if you are using 160 MHz wide channels on the 5 GHz band, they don't play well with some adapters/drivers.
ANDROID USB TO WIN 10 PC - Page 1
Forum section: electronics / general

author: simon christo
author_rank: Regular Contributor
timestamp: August 15, 2025, 07:10:54 am
content: Hi there!!When I initially link the cable, the Mobile beeps, when I disconnect it, it doesn't make a sound.Also, the PC in 'This PC', doesnt see it.When I purchased it, it could transfer between the two, no problems.What is the best thing to do, in this case??Tah,

author: coromonadalix
author_rank: Super Contributor
timestamp: August 15, 2025, 08:36:45 am
content: woah lots of details here ? geezon windows, you may need android drivers to be installedOR you need to authorize the connection of the android mystery ask for it,OR in some case, if the screen lock is there, nothing will show in windows, just a bling will be heardOR read your device manual or help from the company who made it ?provide more details 1sthad different branded devices and their behaviours where not the same

author: simon christo
author_rank: Regular Contributor
timestamp: August 15, 2025, 12:53:25 pm
content: Thanks, Buddy!! Tah,

author: JPortici
author_rank: Super Contributor
timestamp: August 19, 2025, 07:50:32 am
content: Quote from: simon christo on August 15, 2025, 07:10:54 amChecking on the device that you have usb transfer active. There is a notification that tells you the USB mode, and it should default to "no data transfer"
Bridged network - I cannot disable wireless admin access - Page 1
Forum section: electronics / general

author: Miti
author_rank: Super Contributor
timestamp: August 08, 2025, 07:06:08 pm
content: Hi,I have a network with two routers running Fresh Tomato, one is the main router, the other is bridged through LAN, DHCP disabled. I'm trying to disable Wi-Fi admin access and it works for each router but each one can access the othe's admin GUI since the access comes through LAN. I tried to add scripts that blocks the other's IP to the Firewall, save and reboot but it doesn't work.Is anyone using Fresh Tomato, can you recommend a script that would work? I just tried whatever the internet/ AI recommended.Thanks,Miti
security issues with Bluetooth headphones and earbuds based on Airoha SoC - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: June 26, 2025, 12:14:47 pm
content: Media:Zero-day: Bluetooth gap turns millions of headphones into listening stations -https://www.heise.de/en/news/Zero-day-Bluetooth-gap-turns-millions-of-headphones-into-listening-stations-10460704.htmlResearchers:Security Advisory: Airoha-based Bluetooth Headphones and Earbuds -https://insinuator.net/2025/06/airoha-bluetooth-security-vulnerabilities/QuoteThey didn't disable the debugging interface?
Anubis - Anubis is a Web AI Firewall Utility (Blocks AI from scraping your site) - Page 1
Forum section: electronics / general

author: bingo600
author_rank: Super Contributor
timestamp: July 23, 2025, 01:44:26 pm
content: Just saw this oneAnubis - Anubis is a Web AI Firewall Utility (Blocks AI from scraping your site)Might come in handy for someonehttps://anubis.techaro.lol/https://github.com/TecharoHQ/anubis/Untested by me

author: rteodor
author_rank: Frequent Contributor
timestamp: July 23, 2025, 01:57:50 pm
content: Encountered it already onFreeCAD wiki. Without JS it says:QuoteSadly, I won't enable JS.
OpenWrt Two router - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: April 01, 2025, 03:43:28 pm
content: OpenWrt Two will be a higher-performance router with 10 Gigabit LAN and WiFi 7 support (https://liliputing.com/openwrt-two-will-be-a-higher-performance-router-with-10-gigabit-lan-and-wifi-7-support/):- MediaTek Filogic 880 processor (quad core,1.8 GHz)- 1 x 10G SFP+- 1 x 5G-BaseT- 4 x 2.5G-Base-T- 1 or 2 1GBase-T- WiFi 7 (tri-band)- 1 GB RAM (some report says 4 GB)- M.2 2242 slot- 128 MB NAND flash- 4 MB NOR flash (for recovery image)They aim for a price point around US$ 250.

author: SiliconWizard
author_rank: Super Contributor
timestamp: April 03, 2025, 02:52:23 pm
content: Can't wait.

author: DiTBho
author_rank: Super Contributor
timestamp: April 03, 2025, 10:42:22 pm
content: 10GBpsI am still using 10/100MbpsIt's time to upgrade!

author: WaveyDipole
author_rank: Frequent Contributor
timestamp: April 25, 2025, 12:25:56 pm
content: I was thinking of buying the BPI-R4, but now wondering whether to hold-off.....

author: grumpydoc
author_rank: Super Contributor
timestamp: June 04, 2025, 03:07:26 pm
content: Quote from: WaveyDipole on April 25, 2025, 12:25:56 pmThere's the BPI R4 Pro as wellhttps://docs.banana-pi.org/en/BPI-R4_Pro/BananaPi_BPI-R4_ProIf you want utterly over the top.
Cannot change DNS sever in windows 11 ? - Page 1
Forum section: electronics / general

author: alpher
author_rank: Frequent Contributor
timestamp: March 31, 2025, 02:10:40 am
content: Been tryin to setup a pi-hole dns server on my home lan and while pi-hole was no issue i found out that my isp's router/modem (rogers) has no option to set the dns manualy.Fine I said and proceded to set dns to manual in one of my home pcs, so I set my network&internet/ethernet dns setting to manual and put an local address of my pi-hole.It doesn't work at all. even with raspberry pie power off I still have full, internet acces!!Rebooted several times flushed dns in ipconfig all to noavail. Still have full internet access even though my only dns server is unpowered?How I'm I going to force my comp to use only my local dns?Afraid it's something that win11 forces on us?

author: jc101
author_rank: Frequent Contributor
timestamp: March 31, 2025, 04:19:05 pm
content: Do have IPv6 available from your ISP too?

author: alpher
author_rank: Frequent Contributor
timestamp: March 31, 2025, 11:31:20 pm
content: Bingo!!Forgot that IPv6 is a thing
Cheap wireless card that supports monitor mode and packet injection - Page 1
Forum section: electronics / general

author: glradio
author_rank: Contributor
timestamp: March 29, 2025, 06:59:58 pm
content: Hi, I'm looking for a cheap usb wireless card that has support for monitor mode and packet injection.I'm not looking for an expensive device with long range support like some Alpha brand models, but a cheaper model like the TP-Link versions suggestedhereandhere.Based on your direct experience, can you suggest something ?

author: dobsonr741
author_rank: Frequent Contributor
timestamp: March 29, 2025, 07:17:04 pm
content: Id suggest Rigol or Siglent, and not to give in to anything else cheaper. 4 channels. Plan to learn to use the SCPI interface for data acquisition. It’s a good reason why never look at at an analog scope. Oh, and use AI.
Web server absent - Page 1
Forum section: electronics / general

author: PlainName
author_rank: Super Contributor
timestamp: March 01, 2025, 04:34:05 pm
content: Bit of a strange problem which has me foxed.X86 PC as NAS by running a Synology fork. Works fine and has been fine since first set up: wired gigabit ethernet, fixed IP. There is a web configurator front end and a number of SMB shares.Box is now moved to a different location on the same LAN. Only difference is 50m of wire and another switch from where it was previously. Now, the web configurator doesn't work. Any attempt to access it just hangs with no reply. Tried different browsers, different PCs, all the same. But... the shares are OK. I can transfer files to and from the box at 100MB/s, no problem. I can ping it, no problem. It's just the HTTP stuff that is completely missing.I replaced the switch in case there was something dodgy in that (TP-Link). New switch is a Zyxel and known good, but there is a perfectly good connection (cf data transfer) so I don't see how a simple unmanaged switch can filter out HTTP traffic.Any ideas?

author: PlainName
author_rank: Super Contributor
timestamp: March 02, 2025, 10:07:52 am
content: Solved.There is no web configurator on this box
VPN routers that allow you to select which devices use the VPN and which don't - Page 1
Forum section: electronics / general

author: Anthocyanina
author_rank: Frequent Contributor
timestamp: December 28, 2024, 07:25:36 am
content: Hello. I'm looking for a wifi 6 router which lets me set up a VPN (like nord for example) and then lets me choose which devices on the network connect to the internet through the VPN and which don't. as far as i know, only the asus routers that have "VPN fusion" support this, but I'd like to know if any of the other brands have something like this, preferrably in the sub 120 USD range.Thank you!

author: voltsandjolts
author_rank: Unknown
timestamp: December 28, 2024, 10:25:02 am
content: Perhaps 'split tunneling' is a helpful search term.

author: Anthocyanina
author_rank: Frequent Contributor
timestamp: January 08, 2025, 06:47:07 pm
content: to anyone else who might be interested in this, my father ended up buying the tp link archer ax55 and while this isn't stated anywhere, the VPN client does allow you to determine which devices on the network connect to the internet through a VPN and which don't

author: Sorama
author_rank: Frequent Contributor
timestamp: January 16, 2025, 07:51:47 pm
content: Quote from: Anthocyanina on January 08, 2025, 06:47:07 pmEvery vpn does this.You always have to define the Subnet that goes through the tunnel.
Trying to install OpenWRT in unknown Chinese router - Page 1
Forum section: electronics / general

author: soldar
author_rank: Super Contributor
timestamp: December 20, 2024, 05:33:14 pm
content: I know this is a shot in the dark but here goes.I have a Chinese router, TP-Link TL-WR2041R which I would like to install OpenWRT but I find no support in their website. It is Chinese and totally unknown. I would think it has a double for export but I cannot know.I cannot find reliable specs but looking at the board I seeQualcomm QCA9558-AT4A which I believe is a "router on a chip" including WiFiM13S5121632A-5TG8M x 16 Bit x 4 Banks32M X 16 DDR DRAM, 0.7 ns, PDSO66Elite Semiconductor Memory Technology, Inc.And another small chip I can hardly read but I suppose may be the flash memory.If I go to the http GUI everything is OK (in Chinese)If I try to SSH the connection is rejected.The board has 4 holes for a 4 pin serial jtag interface.Is there a simple way to determine the size of flash memory?Maybe there is a way with a photo of the board to find a twin?Is there some simple "universal" OpenWRT or even just basic Linux that I could install and would allow me to peek around and determine the HW configuration?What is the best way to "attack" this router? It's been in a box for years and I have no other use for it so I do not mind risking it.This is translated from the menu.Software UpgradeBy upgrading the software of this router, you will get new features.Current software version: 3.15.34 Build 130823 Rel.57853nCurrent hardware version: +WR2041N v2 00000000Note: When upgrading, please select the software that is consistent with the current hardware version. Do not turn off the power of the router during the upgrade process, otherwise the router will be damaged and unusable. The upgrade process takes about 60 seconds. When the upgrade is completed, the router will automatically restart.软件升级通过升级本路由器的软件，您将获得新的功能。文 件： 当前软件版本： 3.15.34 Build 130823 Rel.57853n当前硬件版本： WR2041N v2 00000000注意：升级时请选择与当前硬件版本一致的软件。升级过程不能关闭路由器电源，否则将导致路由器损坏而无法使用。升级过程约60秒，当升级结束后，路由器将会自动重新启动。
new Mirai variant: Gayfemboy - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: August 25, 2025, 05:11:17 pm
content: Media:- Mirai-based botnet campaign "Gayfemboy" also active in Germany -https://www.heise.de/en/news/Mirai-based-botnet-campaign-Gayfemboy-also-active-in-Germany-10607459.htmlSecurity researcher:- The Resurgence of IoT Malware: Inside the Mirai-Based “Gayfemboy” Botnet Campaign -https://www.fortinet.com/blog/threat-research/iot-malware-gayfemboy-mirai-based-botnet-campaignAffected Platforms:- Cisco ISE- Cisco ISE-PIC- DrayTek Vigor2960 1.3.1_Beta- DrayTek Vigor3900 1.4.4_Beta- DrayTek Vigor300B 1.3.3_Beta- DrayTek Vigor300B 1.4.2.1_Beta- DrayTek Vigor300B 1.4.4_Beta- Raisecom MSG1200- Raisecom MSG2100E- Raisecom MSG2200- Raisecom MSG2300 3.90- TP-Link Archer AX21 (AX1800) firmware versions before 1.1.4 Build 20230219
Router to remotely manage multiple VOIP calls - Page 1
Forum section: electronics / general

author: ThunderZed
author_rank: Regular Contributor
timestamp: October 28, 2024, 05:55:53 pm
content: I'm going to get 2.5 FTTH fiber connection at home and I'm going to buy a router to make it works with my provider's ONT. I want to keep using my landline phone so I've to get a router with VOIP port AFAIK.Due to my family needs, eg. who lives distant from home to work or study, I want to know if it's possible to use a router this way: I call my daughter from my landline phone connected to my new router via VOIP port and, at the same time, my son that lives distant can participate to our call by his smartphone. Let's define all that a "collective call" where people can interact one to each other ones.Does a such kind of router exist? Anyway I guess it will be necessary to configure all smartphones in the right way other than the new router itself.

author: madires
author_rank: Super Contributor
timestamp: October 28, 2024, 06:55:20 pm
content: That would be a VoIP-ATA with an FXO port integrated into the router. Some better consumer routers (e.g. Fritzbox) or SOHO routers come with FXO ports and the VoIP PBX capabilties needed for conference calls. An alternative solution could be a router supported by OpenWrt or a PC running OPNsense, installing asterisk, and using a stand-alone VoIP-ATA for the old telephone. It won't be plug and play.

author: ThunderZed
author_rank: Regular Contributor
timestamp: October 28, 2024, 07:11:03 pm
content: IndeedAVM Fritz!Box 4050router would be my choice for now, I just didn't know if it can do the job. If you (or anyone else) could confirm its... FXO port and the VoIP PBX capabilities for this job then it would be great and I'll purchase it. I leave you thislinkon 4050 specs as well.

author: madires
author_rank: Super Contributor
timestamp: October 28, 2024, 07:23:33 pm
content: Fritzbox is limited to three-way conferencing (https://en.avm.de/products/fritzbox/fritzbox-4050/technical-specifications/).

author: ThunderZed
author_rank: Regular Contributor
timestamp: October 28, 2024, 08:52:53 pm
content: Ok, so I can make a "conference" call via this AVM router using my old home phone (that's not an IP phone) calling a certain cell phone and then a third smartphone could join the call; is all right?

author: madires
author_rank: Super Contributor
timestamp: October 29, 2024, 08:22:55 am
content: That should work if your analog (POTS) telephone has an R (flash) key for controlling the Fritzbox' PBX.
Not able to see ESP32 AP in busy wifi environment - any ideas why? - Page 1
Forum section: electronics / general

author: globoy
author_rank: Frequent Contributor
timestamp: February 10, 2022, 03:54:53 pm
content: I have an ESP32-based device advertising itself as an access point. Setup is using the default Espressif wifi library configuration with US channels (channel 1 / 100 mSec beacon). In some places - for example an apartment complex with a large number of active wifi networks - clients cannot see the AP (clients tested: Linux, OS X, Win 10, IOS and Android). Clients were near the device. In less busy environments clients have no trouble seeing the device.I also ran an experiment where I took an ESP32 dev board and loaded a simple wifi AP demo program using the ESP32 Arduino environment and saw the same result. I did this as a check to make sure I wasn't doing something clearly wrong in my code which is using the IDF (not Arduino). The dev board could not be seen in the apartment either but could be seen when moved to a less busy environment.Other routers are being seen (for example I could find and connect clients to the apartment owner's xfinity access point).The only thing I can think of is the beacon is getting stomped but maybe I'm missing something else. Perhaps some RF device in the apartment building is misbehaving but I have a report from one customer in a different location that makes me think they saw the same problem. Has anyone ever seen something like this?Unfortunately I didn't think to do a channel assessment but will try that when I can get back for more testing. And I'll try a different beacon period.

author: biggreencod
author_rank: Newbie
timestamp: August 19, 2024, 11:00:15 pm
content: Hi,This is an old thread, but its ver interesting. I am having similar issues. What did you learn about the problem.M

author: tooki
author_rank: Super Contributor
timestamp: August 20, 2024, 12:25:57 am
content: Given that so many devices default to channel 1, it’s the first to get swamped in crowded Wi-Fi environments. Using 6 or 11 may be better. (Because 2.4GHz Wi-Fi channels actually use multiple frequencies, 1, 6, and 11 are the only ones that do not overlap at all.)

author: Halcyon
author_rank: Unknown
timestamp: September 01, 2024, 02:30:04 am
content: Quote from: tooki on August 20, 2024, 12:25:57 amWi-Fi is not the only thing you need to contend with. You have Bluetooth, which can interfere with all 2.4 GHz Wi-Fi channels (1 through to 14), wireless devices such as keyboards, mice, baby monitors, and IoT/sensors that use ZigBee, Thread etc...2.4 GHz really sucks basically.
D-Link routers: more backdoors, again - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: September 17, 2024, 12:19:34 pm
content: Telnet backdoor with hard-coded credentials (and a few security issues more):https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10412Affected routers: COVR-X1870, DIR-X4860 and DIR-X5460

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 17, 2024, 08:59:52 pm
content: I you have to buy one of these "consumer" routers, first thing you should do IMO is reflash it with OpenWrt (or pfSense/....) - check that it's supported.When they don't have blatent backdoors, most of these are full of undocumented "phone home" features.In this specific D-Link case, is that intentional backdoors, or maybe remnant development/test code that they forgot to disable in production firmware? (Trying to give them the "benefit" of the doubt.)

author: magic
author_rank: Super Contributor
timestamp: September 18, 2024, 07:30:49 am
content: This depends on whether the employee who left it in had a second job at some 3LA or not
Looking for the drivers and software for Optiview XG - Page 1
Forum section: electronics / general

author: marceuchiha
author_rank: Newbie
timestamp: July 20, 2024, 11:36:42 pm
content: Hi, I am looking for the drivers and software for an Optiview XG blue and yellow. The SSD was corrupted, so I reinstalled the OS. Now I need the drivers and Optiview XG Desktop.
heads-up: Linksys mesh routers Velop Pro WiFi 6E and Velop Pro 7 - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: July 10, 2024, 10:55:14 am
content: Belgian Testaankoop found something interesting when testing Linksys mesh routers Velop Pro WiFi 6E and Velop Pro 7 (https://www.test-aankoop.be/hightech/wifi-versterkers/nieuws/router-linksys-onveilig,in Dutch):QuoteNo response from Linksys so far (notified in November 2023).

author: bingo600
author_rank: Super Contributor
timestamp: July 10, 2024, 01:10:13 pm
content: Sigh
Juniper tops them all (225 security issues fixed in their SIEM) - Page 1
Forum section: electronics / general

author: madires
author_rank: Super Contributor
timestamp: June 24, 2024, 01:22:41 pm
content: Juniper published a patch for 225 security issues in Secure Analytics (a SIEM). You can see the complete list athttps://supportportal.juniper.net/s/article/On-Demand-JSA-Series-Multiple-vulnerabilities-resolved-in-Juniper-Secure-Analytics-in-7-5-0-UP8-IF03?language=en_US. I give them afor being sincere.