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by B.Goode
Mon May 21, 2018 8:11 pm
Forum: General discussion
Topic: Remote Desktop Access from Pi to Pi
Replies: 3
Views: 68

Re: Remote Desktop Access from Pi to Pi

Any ideas? It's doable. It's so 'out of the box' simple that maybe there is no search term that would find it. Just set up the rover with an operating system on which the ssh server/listener/daemon is enabled, then make an ssh connection to it from the 'ground station'. That allows you full remote ...
by B.Goode
Mon May 21, 2018 6:40 pm
Forum: Beginners
Topic: RP zero as server to SGI workstation
Replies: 4
Views: 66

Re: RP zero as server to SGI workstation

Greetings. I probably can't help in any practical way, but among my many indiscretions I spent some time as a sysadmn for a collection (not a cluster) of Silicon Graphics hardware - a headless 'mainframe' and several desktop workstations - running irix. The difference in price for the differential i...
by B.Goode
Mon May 21, 2018 6:25 pm
Forum: Beginners
Topic: [Question] Perimeter
Replies: 5
Views: 94

Re: [Question] Perimeter

any idea is welcome


Go to the Mathematics Department of your University and ask them to teach you some (Cartesian) coordinate geometry.



It is an interesting question.

But it is not one that is directly related to the use of a Raspberry Pi.
by B.Goode
Mon May 21, 2018 3:05 pm
Forum: Troubleshooting
Topic: I cannot get my Pi to connect to the internet
Replies: 9
Views: 207

Re: I cannot get my Pi to connect to the internet

Any other suggestions before I just buy a keyboard ? Since you don't mention trying it... Rewrite a fresh version of Raspbian to the microSD card, and add the ssh marker file, before trying to boot up the RPi again. (The set up of the card may have become corrupted by being used with an inadequate ...
by B.Goode
Mon May 21, 2018 2:43 pm
Forum: Troubleshooting
Topic: I'm not able to connect my Raspberry Pi with SSH
Replies: 4
Views: 96

Re: I'm not able to connect my Raspberry Pi with SSH

I have followed http://www.circuitbasics.com/raspberry- ... less-mode/ tutorial for setting up my new Raspberry Pi.
Unfortunately, that tutorial is out of date and incomplete.
by B.Goode
Mon May 21, 2018 11:38 am
Forum: Beginners
Topic: Using RPI for searching in huge .txt
Replies: 22
Views: 278

Re: Using RPI for searching in huge .txt

An RPi running the Raspbian Operating System can in principle do anything a Linux 'mainframe' computer can do.

But it will take a lot longer..

Try it and see. But I have a feeling you will find it frustrating.
by B.Goode
Sun May 20, 2018 5:59 pm
Forum: Troubleshooting
Topic: I cannot get my Pi to connect to the internet
Replies: 9
Views: 207

Re: I cannot get my Pi to connect to the internet

Welcome to the Raspberry Pi forums. There is a Troubleshooting guide for these forums here: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=58151 It contains the accumulated wisdom from these forums over the past six years. From your description it seems possible that the reason for your net...
by B.Goode
Sun May 20, 2018 11:41 am
Forum: Beginners
Topic: Controlling RPi wired from PC without ethernet.
Replies: 6
Views: 167

Re: Controlling RPi wired from PC without ethernet.

Ethernet is a LAN technology. You don't have to dedicate an ethernet port to a point-to-point connection to a single system. Why not add a cheap Ethernet switch like this one: http://www.broadbandbuyer.com/products/9673-tp-link-tl-sf1005d/ (Similar products are available from other manufacturers and...
by B.Goode
Sun May 20, 2018 8:10 am
Forum: Python
Topic: serial read
Replies: 1
Views: 59

Re: serial read

Welcome to the Raspberry Pi forums. Anything to do for reading more than 3 parameters and publishing? [The following is untested but gives the general principle - ] 1. Ensure the 4th and subsequent values are present in the serial data; 2. Extract the required data from the serial input; altitude = ...
by B.Goode
Sun May 20, 2018 6:28 am
Forum: General discussion
Topic: Setup, Upgrading from B to B+
Replies: 1
Views: 49

Re: Setup, Upgrading from B to B+

Welcome to the Raspberry Pi forums. A precise answer to your question depends on knowing what Operating System is installed on your older RPi, and how it was installed. If you are running Raspbian Stretch installed directly from an image file and it is fully up-to-date the microSD card can simply be...
by B.Goode
Sun May 20, 2018 6:14 am
Forum: Beginners
Topic: GPIO button connection with pi zero W
Replies: 5
Views: 118

Re: GPIO button connection with pi zero W

I tested one circuit on my rpi3 and the led attached to it lit up and then plugged the same circuit into the pi zero and the led did not light up. Is it possible that there is a fault with the soldering of the 40-way header to the RPi Zero? An RPi 3 will have that header installed on the production...
by B.Goode
Sat May 19, 2018 8:01 pm
Forum: Python
Topic: What is the difference between code academy Python and Pi's Python?
Replies: 24
Views: 402

Re: What is the difference between code academy Python and Pi's Python?

it doesn't work Presumably there is only one correct way for it to work? But a multiverse of ways in which it might not work! Does it give a syntax error? Or no output? Or the wrong output? (Indentation is a critical part of Python syntax. The forum software removes indentation from material posted...
by B.Goode
Sat May 19, 2018 5:51 pm
Forum: Troubleshooting
Topic: [SOLVED ]Force Boot to Bash (LightDM not installed/NO DISPLAY)
Replies: 2
Views: 45

Re: Force Boot to Bash (LightDM not installed/NO DISPLAY)

Welcome to the Raspberry Pi forums.

I probably can't help, but I have a feeling that anyone who does know enough to help you may need to know what Operating System is running on your RPi.
by B.Goode
Sat May 19, 2018 5:24 pm
Forum: Beginners
Topic: Controlling RPi wired from PC without ethernet.
Replies: 6
Views: 167

Re: Controlling RPi wired from PC without ethernet.

Curious to understand why you explicitly rule out Ethernet?

Is WiFi an option instead?
by B.Goode
Fri May 18, 2018 9:27 pm
Forum: Troubleshooting
Topic: Raspberry Pi 3 B V1.2 Not Booting - Possible Short
Replies: 3
Views: 111

Re: Raspberry Pi 3 B V1.2 Not Booting - Possible Short

There is a Troubleshooting guide for these forums here: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=58151 It contains the accumulated wisdom from these forums over the past six years. No Act light does not look promising. I have never heard an RPi make an audible whine: perhaps there is ...
by B.Goode
Fri May 18, 2018 9:12 pm
Forum: Python
Topic: Subscribing to Multiple MQTT topics
Replies: 5
Views: 104

Re: Subscribing to Multiple MQTT topics

So you can see from the content of the Topic: debugging message that the on_message() function is aware of the message topic and the message payload.

All you have to do is write some code that reacts to the content of those variables and plays a different .wave file for each one.
by B.Goode
Fri May 18, 2018 9:04 pm
Forum: General discussion
Topic: View PDF on Raspbian Lite?
Replies: 5
Views: 178

Re: View PDF on Raspbian Lite?

It might be easier to concede that one of the major sets of components that are omitted to make a Lite version of the operating system are the graphical utilities needed to display images, such as the Desktop? So to be able to display an inherently graphical file format such as a PDF you will need t...
by B.Goode
Fri May 18, 2018 8:56 pm
Forum: Python
Topic: Subscribing to Multiple MQTT topics
Replies: 5
Views: 104

Re: Subscribing to Multiple MQTT topics

Your script only subscribes to a single topic, tamper.

If you publish an mqtt message to the tamper topic does your script print the progress message beginning "Topic: " ? Does it play the designated sound file?
by B.Goode
Fri May 18, 2018 9:14 am
Forum: Python
Topic: Unable to write to a .txt file when using GPS
Replies: 2
Views: 67

Re: Unable to write to a .txt file when using GPS

Welcome to the Raspberry Pi forums.


Maybe you should close the file to ensure that data is written to it.

Even if you do that, you will only see "writing to file" many times, you do not write any gps data to the file.
by B.Goode
Fri May 18, 2018 7:07 am
Forum: Beginners
Topic: Halloween Project
Replies: 10
Views: 218

Re: Halloween Project

Its issue 51, November 2016. If you look at the illustration on it, the connections don't show pin 4 being used, even though the code to get it to work is pin 4. Hope this makes some sense :) The annotation on the diagram says "Connect the PIR sensor's OUT cable to GPIO pin 4. As the image posted b...
by B.Goode
Thu May 17, 2018 8:28 pm
Forum: Beginners
Topic: SSH or VNC direct with no Internet access
Replies: 2
Views: 91

Re: SSH or VNC direct with no Internet access

would like to be able to access my pi in the field over my telephone where there is no wifi. You can provide your own WiFi, you don't have to rely on someone else providing it as a service. And you don't need Internet access. The following options require either an RPi ZeroW or one of the RPi 3B mo...
by B.Goode
Thu May 17, 2018 8:15 pm
Forum: General programming discussion
Topic: How do I protect my code?
Replies: 32
Views: 1875

Re: How do I protect my code?

I wonder how the developers of commercial RPI commercial aps handle this issue As an example, go to the Download page for the Raspberry Pi Foundation supported Raspbian Operating System: https://www.raspberrypi.org/downloads/raspbian/ Look carefully at the Note: foot of the page where your attentio...
by B.Goode
Thu May 17, 2018 4:10 pm
Forum: Troubleshooting
Topic: intalling updates
Replies: 3
Views: 115

Re: intalling updates

Since what you describe does indeed sound strange, could you provide some background information to support a possible meaningful reply?

What Operating System is running on your RPi?

How exactly do you try to install updates?

What is the full text of the resulting error message?
by B.Goode
Thu May 17, 2018 2:21 pm
Forum: Automation, sensing and robotics
Topic: temp sensor ds18b20 problems
Replies: 8
Views: 228

Re: temp sensor ds18b20 problems

do u have any code or script to simulate another w1 on other pin? i was searching all day and i didnt found anything :( At the moment I can't find a definitive answer from the Raspberry Pi Foundation documentation either. But this link appears to provide the basic details you need to know: https://...

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