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by hippy
Tue Jan 23, 2018 5:03 pm
Forum: Off topic discussion
Topic: Something new
Replies: 10
Views: 604

Re: Something new

I seriously hope no "regular" Pi model ever has on-board flash memory. I wouldn't have a problem if it does; providing booting from an SD Card takes precedence. I would not be adverse to adding anything to a Pi if it did not push the RRP up but it almost certainly would and I don't think the 'lowes...
by hippy
Tue Jan 23, 2018 4:49 pm
Forum: General discussion
Topic: Next Gen Raspberry: Joint venture?
Replies: 13
Views: 322

Re: Next Gen Raspberry: Joint venture?

The existence of Pixel PC argues against argumetns of "lock in". Some would argue it proves it; demonstrates a desire and intent to move people from standard Debian to an RPF flavour of how things should be. Some will interpret it as the RPF trying to capture the traditional PC scene as much as Win...
by hippy
Tue Jan 23, 2018 3:07 pm
Forum: Automation, sensing and robotics
Topic: Robotic Observatory: Should I Solder the Pi Zero when done Prototyping the Circuits?
Replies: 3
Views: 52

Re: Robotic Observatory: Should I Solder the Pi Zero when done Prototyping the Circuits?

I would always recommend using headers unless there were a compelling reason to solder directly.

I think you would need a very adverse environment for header connections to fail and a soldered connection may not actually fare much better in such circumstances.
by hippy
Tue Jan 23, 2018 12:41 pm
Forum: General discussion
Topic: Next Gen Raspberry: Joint venture?
Replies: 13
Views: 322

Re: Next Gen Raspberry: Joint venture?

Not true anyway. And as you say, why would it be a problem if it were true? "Everyone wants to rule the world" as they say and, I guess, if the Pi did, it would potentially create the same concerns as any monopoly would. Some people do fear the Pi becoming some sort of Microsoft-Windows-Intel or Go...
by hippy
Tue Jan 23, 2018 11:49 am
Forum: Raspbian
Topic: Networking - Raw Ethernet programming
Replies: 9
Views: 289

Re: Networking - Raw Ethernet programming

My question is about how to configure Raspbian (using code or config files) so that the Ethernet ports that I'm using for that raw receive and transmit aren't also used for normal IP traffic. If I undesrtand correctly: You want to be able to divert all the packets to your own program and prevent th...
by hippy
Tue Jan 23, 2018 11:01 am
Forum: General discussion
Topic: Next Gen Raspberry: Joint venture?
Replies: 13
Views: 322

Re: Next Gen Raspberry: Joint venture?

caerandir wrote:
Tue Jan 23, 2018 10:16 am
Libre Computer
We believe that the Raspberry Pi Foundation is making a play with Broadcom to take a controlling stake of the future computing market.
Interesting 'conspiracy theory'. I am not sure I find it particularly worrisome even if it were the case.
by hippy
Tue Jan 23, 2018 9:52 am
Forum: Troubleshooting
Topic: Directory listing Vulnerability at http://downloads.raspberrypi.org/weather_station/images/
Replies: 3
Views: 81

Re: Directory listing Vulnerability at http://downloads.raspberrypi.org/weather_station/images/

The web server is configured to display the list of files contained in this directory. This is not recommended because the directory may contain files that are not normally exposed through links on the web site. I would imagine those files are made available via Directory Listing to avoid needing t...
by hippy
Tue Jan 23, 2018 9:38 am
Forum: Other languages
Topic: Easy Way to code Raspberry with blocks
Replies: 22
Views: 430

Re: Easy Way to code Raspberry with blocks

node-red is very different from the traditional idea of flow charts as presented by flowgorithm and other block structured programming tools. Flow charts are all about the control flow of a program. With their diagramatic representations of expressions, decision statements, loops, etc. node-red is ...
by hippy
Mon Jan 22, 2018 1:29 pm
Forum: General discussion
Topic: USB UART extension
Replies: 5
Views: 113

Re: USB UART extension

So if I understand correctly, adding a usb UART will free up the rpi onboard UART? And then I can simply point my RFID script to /dev/ttyUSBx instead of /dev/ttyATA0? That is correct. Every USB-to-Serial device plugged in to a Pi will create a new /dev/ttyUSBx device if Linux recognises it or has d...
by hippy
Sun Jan 21, 2018 7:52 pm
Forum: General discussion
Topic: I dont remember the password what can I do about this?
Replies: 8
Views: 350

Re: I dont remember the password what can I do about this?

sudo apt-get install matchbox-keyboard After installation the keyboard is not to be found anywhere on the desktop or start meny. I recall the same issue. I have "Florence Virtual Keyboard" installed instead. It works with mouse+TV, doesn't need a touch screen. It is usable but I wouldn't call it pe...
by hippy
Sat Jan 20, 2018 11:37 am
Forum: Android
Topic: Android OS
Replies: 6
Views: 280

Re: Android OS

For the purpose for which the Pi was invented, Android is a trap. It hides the actual computer away where you can't get at the system to so anything other than the very limited repertoire of canned applications. It is entirely possible to develop one's own Android Apps and many people do. Besides i...
by hippy
Thu Jan 18, 2018 6:06 pm
Forum: Python
Topic: Analogic reading using thread not working! help!
Replies: 7
Views: 205

Re: Analogic reading using thread not working! help!

Or it could be an error with 'turb = round(self.total / self.count)', the function being called while count is zero.

Posting the full error report will probably help identify what the problem is.
by hippy
Thu Jan 18, 2018 2:39 pm
Forum: General discussion
Topic: Whoops! - Two Power Sources
Replies: 9
Views: 291

Re: Whoops! - Two Power Sources

Pi still working fine. That's good to hear. What has probably happened is that one supply was weaker than the other, had its voltage pulled up or down to what the other supply was delivering, and any 'fighting each other' and raising the potential for damage was minimised. Or any adverse situation ...
by hippy
Thu Jan 18, 2018 2:13 pm
Forum: General discussion
Topic: Eben Upton on BBC Radio 4 "The Life Scientific"
Replies: 26
Views: 1174

Re: Eben Upton on BBC Radio 4 "The Life Scientific"

Given there was quite a lot spoken about BBC not wanting to take it on ... I would have asked about BBC micro:bit that came out later and late I don't think it's entirely fair to say the BBC did not want to take the Pi on. Rather it would have been inappropriate for the BBC and the government drive...
by hippy
Thu Jan 18, 2018 1:47 pm
Forum: General discussion
Topic: Eben Upton on BBC Radio 4 "The Life Scientific"
Replies: 26
Views: 1174

Re: Eben Upton on BBC Radio 4 "The Life Scientific"

http://apps.charitycommission.gov.uk/Showcharity/RegisterOfCharities/CharityWithPartB.aspx?RegisteredCharityNumber=1129409&SubsidiaryNumber=0 Full filing history and accounts are available at - RPF : https://beta.companieshouse.gov.uk/company/06758215/filing-history RPT : https://beta.companieshous...
by hippy
Thu Jan 18, 2018 12:43 pm
Forum: General discussion
Topic: Whoops! - Two Power Sources
Replies: 9
Views: 291

Re: Whoops! - Two Power Sources

sparkyhall wrote:
Thu Jan 18, 2018 12:13 pm
That's extremely unlikely because most power supplies can only source, not sink, current.
Any difference in voltages at the two ends of a conductor will cause current to flow in that conductor.
by hippy
Wed Jan 17, 2018 8:27 pm
Forum: Advanced users
Topic: Configure Raspberry Pi to be used as a single use GUI for commercial product
Replies: 9
Views: 280

Re: Configure Raspberry Pi to be used as a single use GUI for commercial product

I don't believe ultibo supports WiFi at present and I think you are right; it probably isn't that portable. I am guessing you could add an abstraction layer to make it more portable. I have been doing that and auto-translating my Python code which runs on Pi and PC into Pascal to run with ultibo . I...
by hippy
Wed Jan 17, 2018 7:01 pm
Forum: Advanced users
Topic: Configure Raspberry Pi to be used as a single use GUI for commercial product
Replies: 9
Views: 280

Re: Configure Raspberry Pi to be used as a single use GUI for commercial product

I was starting to think that since I wasn't finding other people asking these questions that my initial instincts were right and Raspberry Pi still isn't really a good option for commercial product no matter how small the scale. The Pi is really no different to any other computer system, SBC or mic...
by hippy
Wed Jan 17, 2018 4:38 pm
Forum: Python
Topic: Read serial
Replies: 2
Views: 100

Re: Read serial

def update(self): s.readline() for change1 in s.readline(): colour1 = "green" You probably need something like - def update(self): txt = s.readline().strip() if txt == "change1": colour1 = "green" It might be worth trying some smaller projects and testing some proof of concept code to get a better ...
by hippy
Wed Jan 17, 2018 3:32 pm
Forum: General discussion
Topic: Basic serial question
Replies: 6
Views: 249

Re: Basic serial question

I never even new isavalidnumber() existed, so glad I asked the question. It doesn't exist AFAIK; that would be a function you would have to create yourself. There are some isnumeric() and isdigit() functions available in Python but you would have to determine if compatible with the version you are ...
by hippy
Wed Jan 17, 2018 9:50 am
Forum: General discussion
Topic: Basic serial question
Replies: 6
Views: 249

Re: Basic serial question

The best thing to do is to check 'input' contains something valid before you pass it to the int() function, something like ... input = ser.readline() input = input.strip('\0') if isavalidnumber(input): raw_number = int(input) else: ... Additionally you can wrap try-except error traps around the code...
by hippy
Tue Jan 16, 2018 10:20 pm
Forum: General discussion
Topic: Eben Upton on BBC Radio 4 "The Life Scientific"
Replies: 26
Views: 1174

Re: Eben Upton on BBC Radio 4 "The Life Scientific"

The RPF finances are, if I'm not mistaken, a public record in the UK, probably through annual tax reporting. That's correct, but it's basically (rounded) £17 million in, £10 million spent, total funds at the end of 2016; £14 million. There's details on how the business costs are arrived at but litt...
by hippy
Tue Jan 16, 2018 6:42 pm
Forum: Troubleshooting
Topic: [SOLVED] python-scrollphathd upgrade problem
Replies: 13
Views: 1426

Re: python-scrollphathd upgrade problem

Two possible reasons: Mistake :o :shock: :? Preparation for h/w built in to imminent Pi4B :twisted: Just to round off the thread. It appears to have been a mistake / oversight - https://www.raspberrypi.org/forums/viewtopic.php?f=116&t=202583#p1259740 And, from that, it seems the issue has been reso...
by hippy
Tue Jan 16, 2018 4:10 pm
Forum: General discussion
Topic: Eben Upton on BBC Radio 4 "The Life Scientific"
Replies: 26
Views: 1174

Re: Eben Upton on BBC Radio 4 "The Life Scientific"

Some bloke called Eben sitting opposite me right now, just told me the sales figures for last year and profits. Impressive, as in, blimey, THAT MANY?? I'm pleased it has done well but not surprised. After all I was predicting a million sales of Pi originals and Pi Zeroes when people were refusing t...
by hippy
Tue Jan 16, 2018 3:54 pm
Forum: Python
Topic: Cannot install Cython
Replies: 2
Views: 88

Re: Cannot install Cython

I recall that when I installed Cython I simply used apt-get rather than pip -

sudo apt-get install cython

I vaguely recall having tried pip but that was taking forever so I aborted that and used apt-get which took mere seconds to complete.

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