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by wh7qq
Fri Oct 28, 2016 9:24 pm
Forum: Troubleshooting
Topic: Hidden Wastebasket?
Replies: 6
Views: 4470

Re: Hidden Wastebasket?

Interesting question. This one ran me around a bit before the answer came to me (I think). I think your question can be answered by the fact that when you do pcmanfm as root, you are not in your home directory so things you delete do not show up there and the directory size may not reflect the chang...
by wh7qq
Thu Oct 27, 2016 4:54 am
Forum: Troubleshooting
Topic: Installing LXDE makes Raspberry Pi 3 freeze in every boot
Replies: 1
Views: 1105

Re: Installing LXDE makes Raspberry Pi 3 freeze in every boo

From the MathWorks web page:"Note that you cannot install MATLAB as a standalone application or execute MATLAB code locally on a Raspberry Pi. To develop applications for the Raspberry Pi to be used in standalone operation, please see the Raspberry Pi Support from Simulink®." I think you need to rea...
by wh7qq
Wed Oct 26, 2016 8:09 pm
Forum: Troubleshooting
Topic: HDMI video output on PI3 goes on and off...
Replies: 7
Views: 1025

Re: HDMI video output on PI3 goes on and off...

I've got a PI3 and it has Rasbian (Latest version) on it and also OSMC with noobs. I'm not sure how you have done this on a single sd card...I was unaware that you could do multiple OS boots from one card. Try it with a fresh install of Raspbian alone on the sd card. See if that doesn't fix your HD...
by wh7qq
Wed Oct 26, 2016 7:32 pm
Forum: Troubleshooting
Topic: Problem with ssh from linux to raspberry
Replies: 10
Views: 1611

Re: Problem with ssh from linux to raspberry

I simply do ssh pi@192.168.1.x (Bad on me, I haven't changed the username) from a linux terminal to either a Raspberry Pi B+ or a RPi 3 or any linux terminal. The command prompt changes to reflect the different device but otherwise works just like a normal terminal. I just did an apt-get install ras...
by wh7qq
Mon Oct 24, 2016 8:11 pm
Forum: Troubleshooting
Topic: False reading from Rain gauge pin
Replies: 26
Views: 4090

Re: False reading from Rain gauge pin

@andyroo21: It is strictly a designer's choice to use the input normally pulled up or down with a resistor and to short to the opposite rail when the switch closes. The software has to change accordingly. You might want to put a 1K resistor in between the relay contact and the input just in case of ...
by wh7qq
Sun Oct 23, 2016 8:41 pm
Forum: Troubleshooting
Topic: False reading from Rain gauge pin
Replies: 26
Views: 4090

Re: False reading from Rain gauge pin

Is this a possibility that the moving magnet that operates the reed switch Might be introducing a signal in to the reed switch wire leads, It is well known Fact if moving a magnet across a copper wire, this will generate a EMF in the Wire. I might be right or I might be wrong. In principle, correct...
by wh7qq
Sun Oct 23, 2016 7:33 pm
Forum: Troubleshooting
Topic: False reading from Rain gauge pin
Replies: 26
Views: 4090

Re: False reading from Rain gauge pin

So why bother with the 10K to ground? That holds your input at just about 1.1 volts. I don't recall (in fact, neither Broadcom or Raspberry seem to publish this spec and it probably varies from Pi to Pi) the exact transition point on the input but you are setting the input level closer to it than ne...
by wh7qq
Sun Oct 23, 2016 7:09 pm
Forum: Troubleshooting
Topic: False reading from Rain gauge pin
Replies: 26
Views: 4090

Re: False reading from Rain gauge pin

Your schematic diagram doesn't show values for the resistors you have on the input. It also does not indicate if the reed relay is normally open or closed...many can be wired either way. In any case, on contact closure, your input goes to the level determined by the values of the two resistors. If t...
by wh7qq
Sat Oct 22, 2016 5:15 pm
Forum: Troubleshooting
Topic: Loosing wifi connection...getting it again after some time
Replies: 1
Views: 415

Re: Loosing wifi connection...getting it again after some ti

There are several things to try. It sounds like you are getting some kind of interference with your wifi signal, either a neighbor who is using the same channel or another device like a microwave oven or portable phone. First, try changing the channel setting in your router's firmware. You may still...
by wh7qq
Fri Oct 21, 2016 9:16 pm
Forum: Troubleshooting
Topic: WLAN0 does not show up in ifconfig
Replies: 1
Views: 6246

Re: WLAN0 does not show up in ifconfig

Start with https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=44044 . Toward the bottom of the rather long first post you may find some helpful information. Go to later posts if that doesn't get you working. Much of that was written prior to the Pi3. Fresh installs of Raspbian should find the w...
by wh7qq
Fri Oct 21, 2016 7:42 pm
Forum: Troubleshooting
Topic: Can't get past login-screen
Replies: 6
Views: 3579

Re: Can't get past login-screen

Regarding your keyboard problem, unless you load from Noobs and change the keyboard selection in the panel at the bottom of the OS selection page, the keyboard will revert to gb or eu every time. If you load Raspbian directly, you don't have that option and it will change back regardless of what you...
by wh7qq
Fri Oct 21, 2016 7:26 pm
Forum: Troubleshooting
Topic: False reading from Rain gauge pin
Replies: 26
Views: 4090

Re: False reading from Rain gauge pin

The GPIO pin is going to record a state change every time it senses a contact closure and just putting caps across the line is not going to de-bounce it adequately. Have a look at https://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/robot/buttons_and_switches/ or google "de-bounce gpio raspberry"...
by wh7qq
Fri Oct 21, 2016 7:10 pm
Forum: Troubleshooting
Topic: Pi crashes, all files disappear
Replies: 2
Views: 629

Re: Pi crashes, all files disappear

The first thing to try is a fresh SD card loaded with a fresh copy of Raspbian. See if it boots ok, runs ssh ok, and stays up as it should. You could have had a power failure or a brown out at a time when the Pi was writing to something in the SD card. That would bork the SD card but not so much tha...
by wh7qq
Fri Oct 21, 2016 3:10 am
Forum: Troubleshooting
Topic: Eth0 cable connection only connects locally.
Replies: 2
Views: 450

Re: Eth0 cable connection only connects locally.

We need some more information. What Pi and what OS are you using? Versions? What is between your Pi and the internet? Router, modem, switch? What does

Code: Select all

ifconfig
return? Can you ping outside sites, say 8.8.8.8 or http://www.yahoo.com? Results?
by wh7qq
Fri Oct 14, 2016 8:23 pm
Forum: Troubleshooting
Topic: RAspberry Pi Did not See Windows Systems
Replies: 6
Views: 1138

Re: RAspberry Pi Did not See Windows Systems

I don't have any windows computers on my network so I cannot advise on that issue directly, but most difficulties like this have their roots in the network (router) setup or the windows file sharing setup on the other computers. Can you ping the router/AP and the other computer? That will tell you i...
by wh7qq
Fri Oct 14, 2016 8:00 pm
Forum: Troubleshooting
Topic: B+ Not Booting Anymore
Replies: 3
Views: 688

Re: B+ Not Booting Anymore

With power off, remove SD card and try to reformat with SDFormatter (windows or mac) or gparted (linux). Reload fresh Raspbian or Noobs on the card and try again. If reformat does not work, get a new card from a reputable source and try that. Check with h2testw or f3 to be sure card is legit...count...
by wh7qq
Fri Oct 14, 2016 7:50 pm
Forum: Troubleshooting
Topic: No display on monitor
Replies: 6
Views: 4506

Re: No display on monitor

You may get some hints from the sticky in this forum, above: Setting up HDMI output when video output isn't what you want The part about being sure that the monitor is turned on before powering the Pi may be germaine. Also, is the LG monitor a native HDMI monitor or are you using a DVI to HDMI adapt...
by wh7qq
Fri Oct 14, 2016 7:20 pm
Forum: Troubleshooting
Topic: Bricked my Pi 3. It kernel panics every time I try to boot
Replies: 6
Views: 1228

Re: Bricked my Pi 3. It kernel panics every time I try to bo

Failing a good reformat of the SD card, get a new one from a reputable source and check it with h2testw or f3 to be sure it is not counterfeit. Be sure it is 8 G or larger and class 4 or higher. Load a fresh copy of Raspbian on that and most likely, your Pi will boot normally.
by wh7qq
Thu Oct 13, 2016 9:06 pm
Forum: Troubleshooting
Topic: [SOLVED]Java script a resource hog
Replies: 15
Views: 4443

[SOLVED] Java script a resource hog

Good suggestion. Thank you. I had disabled javascript in about:config to avoid loading still another plugin, but it wiped out too many web pages or prevented filling in data. Noscript allows normal web page viewing but keeps the offending scripts to a minimum. Thanks again.
by wh7qq
Thu Oct 13, 2016 8:26 pm
Forum: Troubleshooting
Topic: [SOLVED]Java script a resource hog
Replies: 15
Views: 4443

Re: Pixel a resource hog

I was premature (wrong) to blame Pixel for the overheating. I tried an older backup with Firefox installed and again the usage went to 100% and the temp went over 70C so I stopped it. Not having the thermometer icon in previous editions, I might not have noticed the overheating or just was in the we...
by wh7qq
Thu Oct 13, 2016 5:20 am
Forum: Troubleshooting
Topic: [SOLVED]Java script a resource hog
Replies: 15
Views: 4443

Re: Pixel a resource hog

Yes, that is why I disabled it in about:config without adding another plug-in. See above:
After going into about:config and disabling javascript, cpu usage stayed below 10% after the initial load and the temp stayed under 60C.
It worked.
by wh7qq
Wed Oct 12, 2016 10:33 pm
Forum: Troubleshooting
Topic: [SOLVED]Java script a resource hog
Replies: 15
Views: 4443

Re: Pixel a resource hog

I ran a test this morning...loaded the offending web page (https://learn.adafruit.com/external-drive-as-raspberry-pi-root?view=all) in Firefox and watched the temp rise to 75C where I stopped the test. Cpu usage remained at 100% for the duration of the test. After going into about:config and disabli...
by wh7qq
Tue Oct 11, 2016 4:32 pm
Forum: Troubleshooting
Topic: [SOLVED]Java script a resource hog
Replies: 15
Views: 4443

Re: Pixel a resource hog

Both Firefox and Chromium are multi-threaded and use multiple cores. Some web pages are simply programs written in JS which are running all the time. This will take a lot of your processing power although nothing really seems to happen and especially when you are connected to multiple websites of t...
by wh7qq
Tue Oct 11, 2016 2:51 am
Forum: Troubleshooting
Topic: WinSCP does not read homedir via Pi3 built-in Wifi
Replies: 2
Views: 677

Re: WinSCP does not read homedir via Pi3 built-in Wifi

The most obvious problem is the short range of the Pi3 wifi. Try getting very close to the router or AP. Your router setup may not be supporting that access route and I can't help you with your router config but do take a look at it. There is also a chance that WinSCP may not play nice with the linu...
by wh7qq
Tue Oct 11, 2016 12:49 am
Forum: Troubleshooting
Topic: keyboard choice raspbian jessie pixel
Replies: 4
Views: 1659

Re: keyboard choice raspbian jessie pixel

No changes I could make from the preferences menu or raspi-config made any diffrence. It was necessary to manually change the /etc/default/keyboard file sudo nano /etc/default/keyboard to read XKBLAYOUT="us" . This is not peculiar to Pixel, but any new installation of Raspian (not Noobs). I saw it o...

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