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by AussieSusan
Mon Dec 16, 2019 1:55 am
Forum: Camera board
Topic: RPi Cam Web Interface
Replies: 5184
Views: 1488645

Re: RPi Cam Web Interface

Thanks @ras07.
I'l give that a shot shortly (last week before my 2-week Christmas break - I just hope I have the time to get back to this then).
Susan
by AussieSusan
Mon Dec 09, 2019 1:52 am
Forum: Camera board
Topic: RPi Cam Web Interface
Replies: 5184
Views: 1488645

Re: RPi Cam Web Interface

(There are so many entries in this thread! Almost needs a Wiki or something of its own. Searched but could not find the answer - sorry if it is buried somewhere.) I want to run my RPi Zero W with a read-only SD card (or as near as I can to that - I have another where the logs are written to memory d...
by AussieSusan
Wed Nov 20, 2019 10:04 pm
Forum: Troubleshooting
Topic: fstab not mounting drive on boot
Replies: 9
Views: 502

Re: fstab not mounting drive on boot

What is the actual error message that fstab is generating when it is trying to mount the drive? (It will be in the log - try 'sudo journalctl -b' and page through the screens until you see the attempt to do the mount; there should be messages either telling you what the error is or where to look to ...
by AussieSusan
Wed Nov 20, 2019 9:54 pm
Forum: Troubleshooting
Topic: RPi Zero W - strange echo on UART Rx pin
Replies: 5
Views: 259

Re: RPi Zero W - strange echo on UART Rx pin

TL;DR: Looks like a faulty channel on the logic analyser part of my oscilloscope! I think I have this sorted out (eventually). Thanks for those who have contributed ideas. I took the idea of a fresh install a bit further. Basically I was already using a fresh install of Buster but I had been playing...
by AussieSusan
Tue Nov 19, 2019 9:26 pm
Forum: Troubleshooting
Topic: RPi Zero W - strange echo on UART Rx pin
Replies: 5
Views: 259

Re: RPi Zero W - strange echo on UART Rx pin

A short was the first thing I checked. Also, after I wrote that message, I managed to trigger off the first character sent by my code (as I said, I used a loop and before started the program and then triggered the scope; this time I did the opposite). In that case the Tx pin was idling high (as expe...
by AussieSusan
Tue Nov 19, 2019 10:09 am
Forum: Troubleshooting
Topic: RPi Zero W - strange echo on UART Rx pin
Replies: 5
Views: 259

RPi Zero W - strange echo on UART Rx pin

I have Raspbian Buster installed (all updated), hciuart disabled, no reference to any console or UART in the cmdline.txt line and dtoverlay=pi3-disable-bt in the config.txt file. Using Python 3 and PiSerial, I set up /dev/serial0 (or /dev/ttyAMA0 - same issue) and write a character to the Tx pin (de...
by AussieSusan
Wed Feb 07, 2018 5:22 am
Forum: Networking and servers
Topic: Impact of disabling the dhcpcd service
Replies: 5
Views: 938

Impact of disabling the dhcpcd service

I have a RPi2 running the latest Raspian image. It is connected to the network through the ETH0: port and it obtains its IP address from my network's DHCP server. (For various reasons the DHCP server provides it with the same IPV4 address every time, but as far as I am aware, the RPi still asks for ...
by AussieSusan
Mon Jul 17, 2017 2:56 am
Forum: Beginners
Topic: Python Programming, invalid Syntax
Replies: 16
Views: 4192

Re: Python Programming, invalid Syntax

If you are running IDLE, then the cursor will be placed in your source file at the point where the error was found. It should also have a highlight at the spot.
That should help you at least locate where the compiler is having problems.
Susan
by AussieSusan
Wed Jun 07, 2017 6:44 am
Forum: General discussion
Topic: What is my correct locale?
Replies: 9
Views: 3313

Re: What is my correct locale?

I suspect that there is a bit of confusion in some of these answers. The OP was asking about "Locale". The 'Timezone' aspect might be wrong but that is NOT the thrust of the question (as I read it anyway). I must admit that setting the locale using either method can be rather difficult and the codes...
by AussieSusan
Mon Dec 19, 2016 4:56 am
Forum: Beginners
Topic: Opening .exe in Raspbian on raspberry pi 2
Replies: 5
Views: 11444

Re: Opening .exe in Raspbian on raspberry pi 2

If the 'install.exe' program is actually for a Windows (rather than DOS) level program, then it will probably be looking for things such as the registry and windows-specific directories. While the install program might, I doubt if it will do what it is supposed to do and leave you with a runnable pi...
by AussieSusan
Fri Dec 09, 2016 2:16 am
Forum: Advanced users
Topic: systemd not stopping weewx daemon
Replies: 1
Views: 616

systemd not stopping weewx daemon

I have installed the latest weewx on a RPI with a fresh copy of the latest (November 2016) Rasbpian. Weewx comes with the old SysV script in /etc/init.d. The only change I've made to that script file is to add in a dependency on $network. Systemd seems to start weewx on boot very well. Also "systemc...
by AussieSusan
Wed Nov 16, 2016 2:04 am
Forum: Automation, sensing and robotics
Topic: Ideas wanted for total cloud coverage device
Replies: 3
Views: 1163

Ideas wanted for total cloud coverage device

I want to augment my private weather station with a sensor to determine the total cloud cover at any point in time (generally measured in 'oktas' or 8ths of the sky covered with cloud) day or night. I have played with the NoIR Pi Camera but there are several things that concern me with this approach...
by AussieSusan
Mon Oct 24, 2016 3:02 am
Forum: Beginners
Topic: Can'r Enable VNC
Replies: 13
Views: 6563

Re: Can'r Enable VNC

Not quite related but several times I've tried to enable VNC from the config GUI and it has worked until the next boot.
The only way I've managed to get the VNC option to stick is to use the 'raspi-config' command form a terminal.
(Latest Raspbian PIXEL release as of today)
Susan
by AussieSusan
Fri Oct 21, 2016 2:08 am
Forum: General discussion
Topic: RPi 3 Heatsink + Case combo (55'c MAX)
Replies: 7
Views: 6669

Re: RPi 3 Heatsink + Case combo (55'c MAX)

Would a 'negative' not be that the metal case would stop the Bluetooth and WiFi signals?
Susan
by AussieSusan
Sat Oct 01, 2016 7:12 am
Forum: Troubleshooting
Topic: Edimax EW-7811UTC Raspbian
Replies: 121
Views: 53248

Re: Edimax EW-7811UTC Raspbian

I just want to say a very big THANK YOU for the work you have done and especially for the install-wifi script.
I was having all sorts of problems and this installed the drivers so simply.
Susan
by AussieSusan
Thu Sep 29, 2016 3:34 am
Forum: Python
Topic: 100% CPU load
Replies: 5
Views: 4127

Re: 100% CPU load

Sort-of but not quite related..... When you interface to mechanical devices such as buttons or switches you need to debounce the signal. Bounces can last for over 5mSec and cause a surprisingly large number of transitions. Adding a 0.1sec and 0.2sec delay is providing some level of debounce in that ...
by AussieSusan
Thu Sep 22, 2016 4:07 am
Forum: Other programming languages
Topic: ARMv8 instructions.
Replies: 86
Views: 18486

Re: ARMv8 instructions.

There is no need to use assembler unless you really need the speed in some odd case. And even then you only need to code that part in Assembler and leave the rest in C or whatever. It all comes down to the basics of optimisation: only start to optimise if the performance is below requirements. Even...
by AussieSusan
Wed Sep 21, 2016 3:20 am
Forum: Other projects
Topic: Raspberry Pi weather station data logger.
Replies: 2
Views: 1098

Re: Raspberry Pi weather station data logger.

Check out WeeWx - and there are other similar programs - that can connect to a wide variety of weather stations.
I have the program running on a Rpi2 but I'm still trying to get my weather station so I can't tell you that everything works OK - not a fault of the program though.
Susan
by AussieSusan
Tue Sep 06, 2016 3:18 am
Forum: Automation, sensing and robotics
Topic: [Beginner] "Phantom" button presses on GPIO?
Replies: 17
Views: 3489

Re: [Beginner] "Phantom" button presses on GPIO?

Wild guess but I suspect that those wires are quite long and you are picking up EMI (I can see a car in the background - garages and cars can be a very electrically noisy environment). Keep the wires short. Also why not just run 2 sires to the button and have the pull-up resistor on the board where ...
by AussieSusan
Fri Aug 12, 2016 3:40 am
Forum: Raspberry Pi OS
Topic: Write RASPBIAN JESSIE image to a 4GB SD card
Replies: 4
Views: 2413

Re: Write RASPBIAN JESSIE image to a 4GB SD card

I've downloaded both of the Jessie versions (normal and lite) from https://www.raspberrypi.org/downloads/raspbian/ and written them to a 4GB SD card with no problems at all (on my iMac using 'dd'). The file system is not expanded until the SD card has been booted from and the system up and running. ...
by AussieSusan
Mon Apr 28, 2014 10:37 pm
Forum: General discussion
Topic: Serial RF 433MHz
Replies: 3
Views: 1498

Re: Serial RF 433MHz

I'm not sure what country you are in, but please note that 433MHz is in the Amateur Radio 70cm frequency band and many countries have this allocated primarily to the Amateur Radio service. I know that there are a number of low power (few milliWatt) devices that use this band for various unlicensed p...
by AussieSusan
Sun Apr 27, 2014 10:38 pm
Forum: General discussion
Topic: Felt current on Raspberry Pi USB port
Replies: 8
Views: 1606

Re: Felt current on Raspberry Pi USB port

You can get this general "problem" when using devices that are not earthed. Using some isolating transformers etc. you can get this effect when the whole "isolated" part floats at some (often quite high) voltage (but generally very low current) above the "earth" potential. When you run your finger o...
by AussieSusan
Mon Apr 21, 2014 10:52 pm
Forum: Beginners
Topic: Gps parts
Replies: 2
Views: 674

Re: Gps parts

As an alternative, have a look for a GPS chip that you can connect up yourself. For a project I'm doing, I have one that needs 3.3V plus a UART connection and 2 control lines (#RESET and ON_OFF). It outputs the NEMA sentences (ASCII or Binary) which you can then interpret. All of the above can be co...
by AussieSusan
Wed Apr 02, 2014 9:36 pm
Forum: Advanced users
Topic: Weather station unattended
Replies: 2
Views: 1140

Re: Weather station unattended

http://lmgtfy.com/?q=raspberry+pi+weather+station As you can see, there is a lot of information, including within these forums, about that. The only point you might need to sort out for yourself is the 3G bit - in other words, how to connect the weather station to your phone (and do you REALLY want ...
by AussieSusan
Wed Mar 19, 2014 9:35 pm
Forum: Raspberry Pi OS
Topic: Bluetooth dongle questions
Replies: 8
Views: 2369

Re: Bluetooth dongle questions

Thanks itsmedoofer, but it is not so screamingly urgent that I can't wait. Also playing with OS patches etc. is a bit outside my comfort zone (not that I'm not willing to learn - just don't have time right now!). On the other hand, I'm a little surprised that this has not been fixed as I would have ...

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