Raspberry Pi Forums

mattmiller

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...

mattmiller

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/

mattmiller

Simply connect Echo and Trig with any two digital pins of raspberry pi 3 and provide +5V and GND. Do not do this under any circumstances - really bad advice Most cheap ultrasonic devices are 5V and need to be connected to a Pi thru resistors Here is a decent article on how to wire them up and some ...

mattmiller

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?

mattmiller

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)

mattmiller

Just seen @AndyRoo post - I'd try a WS2812 tutorial - see what happens - then come back and tell us if it worked

mattmiller

AFAIK Any WS2812 raspberry pi tutorial will work the same with the new WS2813 strips
Just google for raspberry pi ws2812

mattmiller

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

mattmiller

Might be quite useful for robot type projects to keep the Pi running longer

mattmiller

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

mattmiller

Email would be the simplest as far as sending end goes I'd thought

mattmiller

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

mattmiller

What do you actually want to autostart?

mattmiller

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

mattmiller

low cost robots

#LOL

mattmiller

@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...

mattmiller

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

mattmiller

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...

mattmiller

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...

mattmiller

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

mattmiller

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

mattmiller

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...

mattmiller

What's the USP over the myriad other pi robot controller shields and HATs?

mattmiller

A gearbox maybe?

mattmiller

We all have different experiences I run 6 PiZero around the house all communicating with each other using MQTT. (Controlling Neopixel lights and used as TV remote repeaters) Like any electronic device some of them go wrong occasionally - others have been running for two years without a single hiccup...

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