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by mattmiller
Fri Mar 29, 2019 9:09 am
Forum: Troubleshooting
Topic: VNC Interface won't stay enabled
Replies: 15
Views: 773

Re: VNC Interface won't stay enabled

For some strange reason, no-one at RPi seems to have noticed that this issue keeps on being raised
by mattmiller
Sun Mar 24, 2019 9:42 pm
Forum: Python
Topic: Looking for a small hardware device to trigger a python script on my RPi
Replies: 15
Views: 969

Re: Looking for a small hardware device to trigger a python script on my RPi

The amazon dash technique is just a program running that detects a device joining a LAN- it just waits for a specific MAC address to appear. You can use something like a WEMOS D1 mini and use its reset button to make it disconnect and reconnect to your LAN and then detect it rejoining Alternatively,...
by mattmiller
Thu Mar 21, 2019 3:57 pm
Forum: Beginners
Topic: Raspberry Pi, Ultrasonic Sensor and mini Breadboard
Replies: 5
Views: 254

Re: Raspberry Pi, Ultrasonic Sensor and mini Breadboard

JFI - You can now get Pi friendly ultrasonics that don't need resistors and work from 3.3V supply

I highly recommend using them instead of the old 5V ones

example of a 3.3V one
(note no metal can in-between the sensors)

https://www.ebay.com/c/564102643
by mattmiller
Tue Mar 19, 2019 9:27 pm
Forum: General discussion
Topic: SSH fails at a certain Windows PC
Replies: 11
Views: 484

Re: SSH fails at a certain Windows PC

My experience is that Win 10 networking is still not working consistently between Windows machines, so I would not be optimistic about diagnosing and fixing inconsistencies between Windows machines and Pis. :( I only have one Win machine on my house net so I'm probably just lucky that its working (...
by mattmiller
Tue Mar 19, 2019 7:24 am
Forum: General discussion
Topic: SSH fails at a certain Windows PC
Replies: 11
Views: 484

Re: SSH fails at a certain Windows PC

JFI Alternative info for Win 10 machines The need to install Bonjour is no longer required. Win 10 has mDNS built-in. ( I "proved" this when our school computers were replaced with Win 10 machines - they connected to my raspberry pi without Bonjour being installed) Having said that, for most of 2018...
by mattmiller
Thu Mar 14, 2019 7:33 am
Forum: Advanced users
Topic: Run AnyDesk on Boot
Replies: 1
Views: 945

Re: Run AnyDesk on Boot

No idea but can I say that RealVNC is the built-in way of remote access to a Pi I've not tried to access my Pi outside of my LAN but I believe that the could connect works fine from what others have said I'd use that unless you need access for commercial purpose https://www.realvnc.com/en/raspberrypi/
by mattmiller
Thu Mar 07, 2019 7:34 am
Forum: General discussion
Topic: Send a string to website or dashboard every 5 seconds from RP
Replies: 4
Views: 187

Re: Send a string to website or dashboard every 5 seconds from RP

I think it might be best to say what your end goal is - is it to display some sort of data from a sensor connected to a Pi?

What programming languages do you have experience of?
by mattmiller
Tue Mar 05, 2019 9:19 pm
Forum: Troubleshooting
Topic: SOLUTION: VNC does not start on a headless Raspberry pi.
Replies: 8
Views: 1581

Re: SOLUTION: VNC does not start on a headless Raspberry pi.

It seems strange that this problem has been reported many times over past few months but that no fix or acknowledgement seems to have been offered by RPi (that I've seen)
by mattmiller
Tue Mar 05, 2019 11:09 am
Forum: Graphics, sound and multimedia
Topic: ws2813 strip led with raspberry
Replies: 6
Views: 980

Re: ws2813 strip led with raspberry

Just seen @AndyRoo post - I'd try a WS2812 tutorial - see what happens - then come back and tell us if it worked
by mattmiller
Tue Mar 05, 2019 11:07 am
Forum: Graphics, sound and multimedia
Topic: ws2813 strip led with raspberry
Replies: 6
Views: 980

Re: ws2813 strip led with raspberry

AFAIK Any WS2812 raspberry pi tutorial will work the same with the new WS2813 strips
Just google for raspberry pi ws2812
by mattmiller
Tue Mar 05, 2019 8:17 am
Forum: Beginners
Topic: Question about GPIO.setmode in python
Replies: 4
Views: 186

Re: Question about GPIO.setmode in python

know that the first line is supposed to "identify the physical pins to location numbers." However, is there a way to print out the raw data of what this does? For example;
Your over-thinking things - its just sets the mode

Think of it as a fire and forget statement
by mattmiller
Mon Mar 04, 2019 2:30 pm
Forum: General discussion
Topic: RPI 3 B+ running on Battery 200mAh
Replies: 21
Views: 730

Re: RPI 3 B+ running on Battery 200mAh

Might be quite useful for robot type projects to keep the Pi running longer :)
by mattmiller
Fri Mar 01, 2019 7:47 am
Forum: Beginners
Topic: sending/sharing photos between two pi's
Replies: 18
Views: 663

Re: sending/sharing photos between two pi's

can this be done simply with a JS program?
I don't believe it so

Now you've mentioned javascript - I'd recommend trying to using MQTT instead
by mattmiller
Thu Feb 28, 2019 2:38 pm
Forum: Beginners
Topic: sending/sharing photos between two pi's
Replies: 18
Views: 663

Re: sending/sharing photos between two pi's

Email would be the simplest as far as sending end goes I'd thought
by mattmiller
Wed Feb 27, 2019 7:54 am
Forum: Beginners
Topic: what is remote GPIO
Replies: 18
Views: 35321

Re: what is remote GPIO

PiZero Robot vehicle
Instead of running control program on a slow PiZero, you could run/edit your program on a faster machine and just send the control signals to the PiZero
by mattmiller
Tue Feb 26, 2019 7:58 pm
Forum: Beginners
Topic: The dreaded Autostart Application Conundrum - Help Please
Replies: 7
Views: 336

Re: The dreaded Autostart Application Conundrum - Help Please

What do you actually want to autostart?
by mattmiller
Sun Feb 24, 2019 8:35 pm
Forum: Automation, sensing and robotics
Topic: Ultrasonic Sensors
Replies: 2
Views: 400

Re: Ultrasonic Sensors

If you buy the new 3.3V compatible ones they will save you having to use resistors to protect your Pi

example

https://www.ebay.co.uk/itm/HC-SR04-Ultr ... :rk:2:pf:0
by mattmiller
Thu Feb 21, 2019 10:35 am
Forum: Automation, sensing and robotics
Topic: Sphero RVR hackable robot
Replies: 2
Views: 508

Re: Sphero RVR hackable robot

low cost robots
#LOL
by mattmiller
Sun Feb 17, 2019 12:53 pm
Forum: Beginners
Topic: Trying to set up raspberry pi hc-sr04 with a circuit using resistors
Replies: 13
Views: 444

Re: Trying to set up raspberry pi hc-sr04 with a circuit using resistors

@obliteron You are being offered some excellent free advice and help by @pcmanbob Also, its possible that you have purchased a newer type of ultrasonic that is 3.3V compatible Look at the front of the device - is there a metal thingy between the two transducers at the top? If so, you have the 5V dev...
by mattmiller
Thu Feb 14, 2019 9:49 pm
Forum: Python
Topic: waiting for GPIO button press eating resources
Replies: 5
Views: 222

Re: waiting for GPIO button press eating resources

Can I do anything to make it use less resources?
stick a small time.sleep() in the loop

Your loop is running around in a very small circle very fast wearing itself out :)
by mattmiller
Thu Feb 14, 2019 2:50 pm
Forum: General discussion
Topic: [Suggestion]Don't quote long posts in your answers
Replies: 12
Views: 503

[Suggestion]Don't quote long posts in your answers

Including someones long post in a quote in an answer, just makes it harder for others to read and digest the threads And when someone quotes someones long post that quotes someones long post etc :( Just take a little time to cut out the middle bit and stick a few ... instead Just think of the server...
by mattmiller
Wed Feb 13, 2019 2:07 pm
Forum: General discussion
Topic: Pi to Pi python communication
Replies: 10
Views: 428

Re: Pi to Pi python communication

What do you think would be the easiest way to have two pies send data between each other with python? Just going back to your original question :) MQTT is a good way of doing either. Slight learning curve (as with everything) but very useful tool to have under your belt and code complexity is small...
by mattmiller
Wed Feb 13, 2019 11:31 am
Forum: The MagPi
Topic: Proposal for a small robot controller based on RPi Zero
Replies: 8
Views: 1753

Re: Proposal for a small robot controller based on RPi Zero

This is one of the better motor driver boards I have seen.
?????
Its one of the most basic ones out there

You need to get out more :)
by mattmiller
Tue Feb 12, 2019 10:28 pm
Forum: The MagPi
Topic: Proposal for a small robot controller based on RPi Zero
Replies: 8
Views: 1753

Re: Proposal for a small robot controller based on RPi Zero

I'm sure magpi would be happy to publish another robot building/programming article as that sort of thing is its bread and butter but I don't think there's a need for another product in a crowded market unless it literally makes tea as well :)
by mattmiller
Tue Feb 12, 2019 10:25 pm
Forum: The MagPi
Topic: Proposal for a small robot controller based on RPi Zero
Replies: 8
Views: 1753

Re: Proposal for a small robot controller based on RPi Zero

I have seen hats that provide a single function. For example, multiple USB ports, multiple servo controllers, DACs, ADCs, graphic displays. My contribution provides all the functions, on one hat, to control a small wheeled robot. I think your coming to the Pi robot party quite late on Just as one e...

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