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by hippy
Fri Jun 22, 2018 8:10 pm
Forum: Beginners
Topic: Serial and wifi of Pi 3
Replies: 2
Views: 77

Re: Serial and wifi of Pi 3

B.Goode wrote:
Fri Jun 22, 2018 2:43 pm
Either:
Turn on the WiFi hotspot option on your Android device ...
or
Configure your RPi to act as a WiFi hotspot...
If you connect both to your WiFi router they should both be on the same network, see each other, and be able to communicate.
by hippy
Fri Jun 22, 2018 8:02 pm
Forum: Off topic discussion
Topic: Posting a Pi setup to a friend.
Replies: 6
Views: 203

Re: Posting a Pi setup to a friend.

I'm constantly amazed that despite the minimal and flimsy packaging, the stuff I order from China suffers so little damage in transit to me in the UK. It could be that so much is in the middle of the bags which get rough treatment that most is generally well protected and only an small amount will ...
by hippy
Fri Jun 22, 2018 7:47 pm
Forum: General discussion
Topic: Ethernet Switch HAT
Replies: 3
Views: 110

Re: Ethernet Switch HAT

Your best bet would probably be to use multiple USB-to-Ethernet adapters. But you might then run into USB bandwidth limitations.

The Pi is the wrong tool for the job really.
by hippy
Fri Jun 22, 2018 11:58 am
Forum: General discussion
Topic: STICKY: PMs being turned off from June 13
Replies: 54
Views: 2640

Re: STICKY: PMs being turned off from June 13

I don't think anybody, not a single person, understood what I was asking. I think they did. "Is it possible to point out the particular law or reason they were locked off for in the first place? " The reason PM's have been turned off is because the legal advice the forum administrators received is ...
by hippy
Fri Jun 22, 2018 11:10 am
Forum: General discussion
Topic: Pi is too fragile
Replies: 12
Views: 647

Re: Pi is too fragile

The second one, the power connector came loose and now can barely keep any power. You only have to breath on it and it shuts off. It might be worth checking it's not the cable which is the problem. I have a device (not a Pi) where I thought its micro-USB connector had worn out from repeated inserti...
by hippy
Fri Jun 22, 2018 10:54 am
Forum: Beginners
Topic: Raspberry pi 3 b and the industry
Replies: 18
Views: 424

Re: Raspberry pi 3 b and the industry

As always, pick the right tool for the job. Which seems to be what the OP is asking; Is it the right tool for the job ? No one can answer that unless we know exactly what the job is, how safety or business critical it is, what levels of reliability it needs, what the consequences will be of downtim...
by hippy
Fri Jun 22, 2018 10:38 am
Forum: Off topic discussion
Topic: Posting a Pi setup to a friend.
Replies: 6
Views: 203

Re: Posting a Pi setup to a friend.

I would use anti-static foam myself. Just in case and it will also help protect the GPIO pins and other components from damage. More important IMO is a decent box to post it in, something which can stand up to the rough and tumble of postal excursions, will offer some protection against heavy things...
by hippy
Fri Jun 22, 2018 10:27 am
Forum: General discussion
Topic: Documentation for beginners
Replies: 28
Views: 722

Re: Documentation for beginners

It would be more sense if the box the Pi came in had www.raspberrypi.org emblazoned across it. Nothing wrong with that suggestion but I'd go further and add it to the silkscreen of the boards. Not everyone gets their Pi in a box or keeps hold of it, or can find it when they need it. I keep seeing p...
by hippy
Thu Jun 21, 2018 5:29 pm
Forum: General discussion
Topic: STICKY: PMs being turned off from June 13
Replies: 54
Views: 2640

Re: STICKY: PMs being turned off from June 13

Not sure why people find this so objectionable. Some people will always have objections when something is done which doesn't necessarily have to be done. Their view of necessary, or appropriateness of doing it, differs from those doing it. It's a bit like not allowing dogs and pets ( except guide d...
by hippy
Thu Jun 21, 2018 5:03 pm
Forum: General discussion
Topic: Pi Is Too Complicated
Replies: 66
Views: 1820

Re: Pi Is Too Complicated

hippy, Change cause problems; so don't change, don't slavishly rush to follow whatever Debian does, don't seek to be as up to date as one could be. Again I don't get it. If you are following Debian you will not be rushing anywhere. See above. Besides I see no rushing, new Raspbian releases come qui...
by hippy
Thu Jun 21, 2018 1:12 pm
Forum: General discussion
Topic: Pi Is Too Complicated
Replies: 66
Views: 1820

Re: Pi Is Too Complicated

Two important questions are; what are people having problems with and why do they need to do whatever it is which is causing them problems ? I suspect it's mostly Linux/Debian/Raspbian making it that way or they are doing something which isn't run of the mill. The priority should probably be to iden...
by hippy
Thu Jun 21, 2018 12:33 pm
Forum: Windows 10 for IoT
Topic: How to find the IP of Pi 3 without monitor
Replies: 14
Views: 277

Re: How to find the IP of Pi 3 without monitor

I am not familiar with Windows IoT but on other systems which are running it is possible to include some sort of server which can respond to broadcast requests so things can remotely identify them. Maybe there is such a thing for Windows IoT ?
by hippy
Thu Jun 21, 2018 12:12 pm
Forum: General discussion
Topic: Pi Is Too Complicated
Replies: 66
Views: 1820

Re: Pi Is Too Complicated

In short, seems to me that some people are saying they would have preferred to stick with the Pi1 and we should never updated the OS? Have I got that right? Pretty much as I see it. Change cause problems; so don't change, don't slavishly rush to follow whatever Debian does, don't seek to be as up t...
by hippy
Thu Jun 21, 2018 11:16 am
Forum: General discussion
Topic: Cheap Networking
Replies: 12
Views: 554

Re: Cheap Networking

Do consider the speed you want, Raw speed on Ethernet 10 MBits/sec meaning 10,000,000, raw speed on serial perhaps 115,200. Many on-chip UART's and USB-to-Serial chips can pump out 1 Mbps and often more. I recall it being said the Pi could theoretically handle up to 250 Mbps but not sure which UART...
by hippy
Thu Jun 21, 2018 10:38 am
Forum: General discussion
Topic: Pi Is Too Complicated
Replies: 66
Views: 1820

Re: Pi Is Too Complicated

Could you be more specific? All the stuff I've tried, has worked no matter the version of Raspbian I use. Headless setup. Any tutorial that fails to mention creating a file 'ssh' in the boot partition is not going to work. Needing a country code to enable WiFi is something new which out of date tut...
by hippy
Wed Jun 20, 2018 9:13 pm
Forum: General discussion
Topic: Pi Is Too Complicated
Replies: 66
Views: 1820

Re: Pi Is Too Complicated

Odd that people think the complexity is due to divergence from Debian. I suspect most problems are due to tracking Debian; going from Wheezy to Jessie to Stretch. That has meant there's a lot of stuff on the web which no longer applies to the latest. Changes in hardware as the Pi has evolved have a...
by hippy
Wed Jun 20, 2018 7:21 pm
Forum: General discussion
Topic: Pi Is Too Complicated
Replies: 66
Views: 1820

Re: Pi Is Too Complicated

I would suggest that the Raspberry Pi have a stable operating system targeted for use in teaching computer science that is easy to understand and to modify. But what would that be ? I don't think there are many Operating Systems which are easy to understand and modify, and it's a rather niche area ...
by hippy
Wed Jun 20, 2018 2:23 pm
Forum: Off topic discussion
Topic: Pis find illegal images
Replies: 11
Views: 387

Re: Pis find illegal images

He probably trained it on porn so that any picture that may likely be porn is flagged. He doesn't seem to have done much himself except get it to actually work with a Pi. He is using Intel Movidius sticks to classify images and using an open source algorithm from Yahoo. In the good old days; how mu...
by hippy
Wed Jun 20, 2018 12:05 pm
Forum: Off topic discussion
Topic: Pis find illegal images
Replies: 11
Views: 387

Re: Pis find illegal images

How do you check that the thing is working properly without looking at a huge sample of input images and checking how it rates them? If you do that then you must have said images in your possession and are hence breaking the law. This is the fundamental problem with zero tolerance and purely techni...
by hippy
Tue Jun 19, 2018 5:11 pm
Forum: General discussion
Topic: Power for stacking Pi's
Replies: 21
Views: 694

Re: Power for stacking Pi's

How best to wire multiple Pi's probably comes down to how they are laid out in the chosen assembly. If they are laying flat in a 1U case one might not want a 5-pin USB plug sticking out the side, GPIO and 2-pin headers would be more appropriate. The opposite may be more appropriate if stacked or mou...
by hippy
Tue Jun 19, 2018 4:45 pm
Forum: Advanced users
Topic: RS232 serial link with Raspberry PI 3
Replies: 13
Views: 365

Re: RS232 serial link with Raspberry PI 3

my goal is to send a string, (7E 7E 73 02 HiCrc LoCrc) (hexadicimal) I am guessing that, in Python, one of these will do the job where 'hh' and 'll' are your CRC values - def ToHexString(n): return "0"+( hex(n)[2:] )[-2:].upper() ser.write( "7E"+"7E"+"73"+"02"+ToHexString(hh)+ToHexString(ll) ) ser....
by hippy
Tue Jun 19, 2018 4:35 pm
Forum: Advanced users
Topic: Pi3 as master, multiple Pi Zero W's reporting in... ... ...
Replies: 11
Views: 383

Re: Pi3 as master, multiple Pi Zero W's reporting in... ... ...

So, yes, "scrap" the notion that you don't want any microcontrollers, because a lot of what you have described seems to be screaming for something less complex than even a 0W. Also, with talk of light sensors, pH sensors and flow meters, that to me suggests some analogue signalling may be involved ...
by hippy
Tue Jun 19, 2018 3:42 pm
Forum: Advanced users
Topic: RS232 serial link with Raspberry PI 3
Replies: 13
Views: 365

Re: RS232 serial link with Raspberry PI 3

So now I should write a program that can send / receive data of hexadecimal string type, indications? That seems about right. :!: My tutor told me that the data conveyed are bytes (ASCII), but that what I should send and receive is a hexadecimal string, so we should think about converting the bytes...
by hippy
Tue Jun 19, 2018 1:15 pm
Forum: Advanced users
Topic: Pi3 as master, multiple Pi Zero W's reporting in... ... ...
Replies: 11
Views: 383

Re: Pi3 as master, multiple Pi Zero W's reporting in... ... ...

How many I will need based upon the numbers I gave in my original post 4800 sq ft, 530 sq yd, 23 x 23 yd Your 698 x DS18B20 works out about one per sq yd Your 672 x Hall effect switches about the same So about 25 nodes each covering a 5 x 5 yard area (25 sq yd), with 25 x DS18B20, 25 x Hall effect ...
by hippy
Tue Jun 19, 2018 12:50 pm
Forum: Advanced users
Topic: Pi3 as master, multiple Pi Zero W's reporting in... ... ...
Replies: 11
Views: 383

Re: Pi3 as master, multiple Pi Zero W's reporting in... ... ...

This is why I am thinking of choosing the Pi Zero Wireless so that I only have to run as little wiring as needed. In my opinion the Pi Zero W is the wrong tool for the job. You are going to have to run power to every node so you might as well use something more than two core cable to do the job. An...

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