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by Ronaldlees
Mon Mar 19, 2018 2:28 pm
Forum: Automation, sensing and robotics
Topic: Linux Development Board which supports two cameras
Replies: 3
Views: 550

Re: Linux Development Board which supports two cameras

I was looking for similar board, and probably the cmio3 + cm3 is best bet (approx $114 + $54 for cm3 ... approx $114 + $28 for cm3 lite). I think the cm3 lite has both camera slots (one 4 lane, one 2 lane), so might be cheaper option (mods can correct me on this). Only other alternative in range tha...
by Ronaldlees
Sun Mar 18, 2018 11:01 pm
Forum: Networking and servers
Topic: Raspberry pi 3 as AP using strictly wifi
Replies: 4
Views: 740

Re: Raspberry pi 3 as AP using strictly wifi

Are you saying you have no ISP-provided WiFi-to-internet router to make a connection from your Pi AP device? Are you needing public internet access for users of the AP, or is your local webpage all you need?
by Ronaldlees
Sun Mar 18, 2018 5:03 pm
Forum: Other projects
Topic: rtl_fm SDR dongle Scanner
Replies: 3
Views: 999

Re: rtl_fm SDR dongle Scanner

I've noticed that other people using utility voice narrow band FM are also using these in their command line:

Code: Select all

-s 12k
-l 70
12k sample rate for narrow band
70 squelch level

Have you played with the squelch level?
by Ronaldlees
Sun Mar 18, 2018 4:21 pm
Forum: General discussion
Topic: Choosing a Monitor
Replies: 11
Views: 911

Re: Choosing a Monitor

Regardless of the adapter you're using, the Pi can probably be made to work with it (and your monitor). You might need to use a custom configuration in your config.txt file. I used something like this when I had an hdmi-to-vga adapter: hdmi_drive=1 hdmi_ignore_edid=0xa5000080 hdmi_group=2 hdmi_mode=...
by Ronaldlees
Sun Mar 18, 2018 3:57 pm
Forum: Networking and servers
Topic: Server monitor
Replies: 8
Views: 1822

Re: Server monitor

Have you done anything more with this? I've been looking for such a thing as what you describe for quite a while. The usual intrusion detection tools are very verbose and can deep-packet mine, but they're not very good at pattern matching or more intelligent observation of machine state. I even thou...
by Ronaldlees
Mon Mar 12, 2018 8:18 pm
Forum: General discussion
Topic: High range WiFi dongle
Replies: 8
Views: 5002

Re: High range WiFi dongle

@jeanleflambeur thank you very much for detailed answer :) I also planned that maybe just for start and first tests I will grab some Access Point with bigger antennas and power it from my car, so it should work for higher range. @elmo180 Having said these, you might be better of with something like...
by Ronaldlees
Tue Feb 06, 2018 3:45 pm
Forum: General discussion
Topic: Accessing a Pi via Wi-Fi
Replies: 5
Views: 581

Re: Accessing a Pi via Wi-Fi

Hi @balanga (freebsd)! You won't need any routing, and you could do what you want to do without using HostAP (the airport connection), but it'd be very insecure in my non-expert opinion. It's better to use the access point method, IMO, and do it pretty much the way it's described in the referenced d...
by Ronaldlees
Thu Jan 25, 2018 8:42 pm
Forum: Networking and servers
Topic: Server monitor
Replies: 8
Views: 1822

Re: Server monitor

Would this be using AI, or some other means of pattern analysis?
by Ronaldlees
Thu Jan 25, 2018 8:39 pm
Forum: Automation, sensing and robotics
Topic: RSSI signal strength
Replies: 7
Views: 3279

Re: RSSI signal strength

This thread is a little bit dated, and probably the author has already figured out how to do his setup. But, FWIW, when I've played with RSSI it's been my impression that the values are not always consistent for the same distance. It probably has to do with reflections and absorption, etc. I wonder ...
by Ronaldlees
Tue Jan 23, 2018 3:40 pm
Forum: General discussion
Topic: Vivaldi Web Browser - Raspberry Pi
Replies: 22
Views: 5847

Re: Vivaldi Web Browser - Raspberry Pi

One thing that can never be said about old Opera or new Vivaldi users: and that's that they're not really big fans. For me, the new browser is "OK" - and I've noticed no significant problems in about two weeks of usage. Another nice thing is that the same Vivaldi build works just as well on some oth...
by Ronaldlees
Tue Jan 23, 2018 3:29 pm
Forum: Off topic discussion
Topic: Something new
Replies: 10
Views: 3275

Re: Something new

It would be great to have some semi-permanent memory on board RasPi. A note of disagreement here. Having no non-volatile memory (modulo a small handful of OTP bits) is ideal for support and troubleshooting. It means that every machine is, prior to power-on, always in the same factory-fresh conditio...
by Ronaldlees
Tue Jan 23, 2018 3:23 pm
Forum: General discussion
Topic: Any way to turn the Pi Zero off except for an MCU + MOSFET?
Replies: 62
Views: 4827

Re: Any way to turn the Pi Zero off except for an MCU + MOSFET?

Is this a real problem, in the sense that it HAPPENED? Or is it just theoretical speculation? Because there are many other usage scenarios for SD cards when power goes off after a write. For example a camera shutting down from a low battery condition, the user removing it from the computer, and so ...
by Ronaldlees
Mon Jan 22, 2018 10:51 pm
Forum: General discussion
Topic: Any way to turn the Pi Zero off except for an MCU + MOSFET?
Replies: 62
Views: 4827

Re: Any way to turn the Pi Zero off except for an MCU + MOSFET?

Take a Pi B of some sort, issue the shutdown and then *watch* the lights to see what is happening and how long it takes. That's your delay time. Yeah - I've unmounted external (extra) SD based file systems on Pi boards, instinctively grabbed for the SD to pull it, and glimpsed that it still had tho...
by Ronaldlees
Mon Jan 22, 2018 10:10 pm
Forum: General discussion
Topic: Any way to turn the Pi Zero off except for an MCU + MOSFET?
Replies: 62
Views: 4827

Re: Any way to turn the Pi Zero off except for an MCU + MOSFET?

I've seen a few numbers on the current consumption of uSD cards - and it seems to range from 5 - 40 mA. That isn't much power. So, it seems that one could put a pretty low capacity power source on the SD itself, and just leave it run after a power cut. Maybe it could be a rechargable bat, supercap, ...
by Ronaldlees
Wed Jan 17, 2018 6:28 pm
Forum: General discussion
Topic: looking for a simple and lightweight music player for PI ZERO
Replies: 14
Views: 9233

Re: looking for a simple and lightweight music player for PI ZERO

May I suggest the free and open ogg123? It's very lightweight, and can be run easily against plain old ALSA with no extra layers, and best of all - it's built to use the free ogg vorbis format. apt-get install vorbis-tools Example run: nice -n4 ogg123 -d alsa -o dev:"hw:0" --audio-buffer 10000 somel...
by Ronaldlees
Mon Jan 08, 2018 2:58 pm
Forum: Advanced users
Topic: Tracking Raspberry Pi via GPS
Replies: 19
Views: 9582

Re: Tracking Raspberry Pi via GPS

Do you have a Pi 1,2, or 3? On the Pi3, you may need to make some config changes and/or compile gpsd from sources: https://www.raspberrypi.org/forums/viewtopic.php?t=138711 On the Pi2, I just install gpsd via apt-get. Works fine. Then you can use open street maps or one of several other programs to ...
by Ronaldlees
Mon Jan 08, 2018 2:52 pm
Forum: General discussion
Topic: Horrible experience trying to get into pi BUYER BEWARE
Replies: 21
Views: 2347

Re: Horrible experience trying to get into pi BUYER BEWARE

It's a poor attempt at trolling. When the competition can't even troll properly you have to wonder how good they are at electronic design and engineering. I can't help but thinking the same thing, albeit the post could still be genuine, and somebody (perhaps not very tech oriented) - who is simply ...
by Ronaldlees
Sat Jan 06, 2018 5:10 pm
Forum: General discussion
Topic: Chip architecture - is the Pi vulnerable?
Replies: 55
Views: 8011

Re: Chip architecture - is the Pi vulnerable?

One of my SBCs has both A15 and A7 cores. I'm confused by statements made about the A15 (the arm post implies they're not very worried about that core, even though it's on the list mentioned at the top of this thread), but I've turned those cores off just as a precaution. Seems to make negligible di...
by Ronaldlees
Wed Dec 27, 2017 3:21 pm
Forum: General discussion
Topic: What is StrongED
Replies: 15
Views: 1246

Re: What is StrongED

So you were just generally searching for an editor, and found StrongEd. Maybe a fortuitous fork in the fence row for you! If you're looking to kill off the boredom bug, RiscOS could keep you entertained for awhile, and it's available for the Pi!
by Ronaldlees
Wed Dec 27, 2017 3:11 pm
Forum: General programming discussion
Topic: Real time audio processing
Replies: 1
Views: 659

Re: Real time audio processing

Welcome to the Forums! This sounds like an interesting project. I've done nothing like it myself. So long as what you are "moving" does not create a safety hazard, it seems like a unique, challenging little project. Do you want a robot arm to move based on voice commands? You probably should expect ...
by Ronaldlees
Mon Dec 25, 2017 4:03 pm
Forum: Beginners
Topic: security camera
Replies: 2
Views: 459

Re: security camera

I would be inclined to use the official Pi camera (even tho I don't have one yet) - because USB/UVC cameras are going to be slow on the Pi due to the USB bottleneck. I've tried using a USB webcam camera on a Pi2, without very exellent results. Maybe a low-res model could work better, but I'd think t...
by Ronaldlees
Mon Dec 25, 2017 3:56 pm
Forum: General discussion
Topic: no-click micro SD
Replies: 4
Views: 500

Re: no-click micro SD

Really?

I would consider that a plus, cuz I have some of the auto-eject sockets that only eject now.
by Ronaldlees
Mon Dec 18, 2017 2:48 pm
Forum: Off topic discussion
Topic: Net neutrality discussion
Replies: 17
Views: 4694

Re: Net neutrality discussion

This is what it means when net neutrality is not required. Your ISP can determine what sites and services you can access, and at what speed. Companies like Amazon can pay to ensure that they alone offer a decent user experience, effectively destroying all their competition at a stroke. And in areas...
by Ronaldlees
Mon Dec 18, 2017 2:29 pm
Forum: General discussion
Topic: WiFi dongle with monitor mode?
Replies: 12
Views: 27475

Re: WiFi dongle with monitor mode?

Newer versions of the TP Link TL-WN722N (namely v2 and v2.1) do not support monitor mode out of the box. Right. I think that is because they switched from the Atheros chipset to something else (maybe RAlink or Realtek). But v1 has the Atheros AFAIK. The WN822N v1 had the AR9170 chipset, but it's th...
by Ronaldlees
Wed Nov 29, 2017 12:31 am
Forum: Advanced users
Topic: What happens to the Pi if I connect a 4.2V voltage source to its power input?
Replies: 5
Views: 701

Re: What happens to the Pi if I connect a 4.2V voltage source to its power input?

Probably the lower voltage on the 5V rail is more likely to cause issues with HDMI, if that's being used, than with some or even most USB stuff. Just guessing.

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