DevHeads IoT Integration Server•15mo ago

how ?

kristof-at-embeetle•10/20/24, 9:56 AM

Hey everyone,
check out my experiences at the Hong Kong Electronics Fair:

kristof-at-embeetle•10/20/24, 9:56 AM

https://embeetle.com/#blog/hk-electronics-fair

Kkristof-at-embeetle Hey everyone, check out my experiences at the Hong Kong Electronics Fair:

techielew•10/20/24, 2:22 PM

Are you back in Belgium?

techielew•10/20/24, 2:30 PM

Hey @Event Pings and @Middleware & OS get ready for today’s Engineering Hour on message queues and intertask communication in FreeRTOS! It starts in 30 minutes here: https://app.livestorm.co/devheads-community/devheads-weekly-office-hours-1

What questions do you have for Umesh?

DevHeads IoT Integration Server

Engineering Hour: Message Queues & Intertask Communication with Fre...

PLEASE JOIN AS A SPEAKER IF YOU WANT TO PARTICIPATE IN THE DISCUSSION!Join DevHeads meetups to connect with other DevHeads and riff on a variety of topics for 30-60 minutes. Join here: https:...

Fatogoma•10/20/24, 4:36 PM

Hey guys,it's a pleasure to join your community.I'm embedded system engineer ,want to learn and share experience.

FFatogoma Hey guys,it's a pleasure to join your community.I'm embedded system engineer ,wa...

Camila_99$$•10/20/24, 4:38 PM

Welcome @Fatogoma !

CCamila_99$$Welcome @Fatogoma !

Fatogoma•10/20/24, 4:39 PM

@Camila_99$$ Thank you.

Kke7c2mi Any DSP nerds around? I've been messing about with concepts related to 1 bit AD...

Navadeep•10/20/24, 5:26 PM

That's a quite widespread(or lets say broadband ;)) question - interesting play you're into.

As I understand you want to make a 1 bit SDR having PDM signal generated again from a 1-bit ADC. Now you want to mix it with a LO which was fine, but also want to take PDM signal as a mixing reference?

If wanting for a SDR, how about converting your PDM with a low-pass filter or a CIC filter in digital logic implementation.

NNavadeep That's a quite widespread(or lets say broadband ;)) question - interesting play ...

ke7c2mi•10/20/24, 8:22 PM

So why this is interesting is it implies I could mix digitally before conversion - I already have a pipeline established that can do nyquist zone selection and down conversion - but I have to do a bit of downconversion before the data is at a rate that I can run filters on it - that part of the chain is not flexible

If I can digitally mix at the fpga input pin with this technique I can work around that and make the whole receiver more configurable

AAbdullah how ?

Marvee Amasi•10/20/24, 9:16 PM

An arduino uno rr4 wifi to blynk platform , dynamically changing the wifi network name and password without altering the code is feasible , just that it requires the use of a wifi provisioning feature, somewhat like a blynk edgent library. Heard of Blynk.Edgent? Dat is designed for dynamic wifi management, it will wat wil make this work

MMarvee Amasi An arduino uno rr4 wifi to blynk platform , dynamically changing the wifi netw...

AbdullahOP•10/20/24, 9:28 PM

Yes I heard about it and used it on esp32 but it doesn't support arduino uno r4 wifi

AAbdullah Yes I heard about it and used it on esp32 but it doesn't support arduino uno r4 ...

Marvee Amasi•10/20/24, 9:32 PM

You sure about that ?

AbdullahOP•10/20/24, 9:35 PM

Yes I am sure, there is another library for embedded MCUs called blynk.ncp but I don't know how to use it if you know can you help me?

Marvee Amasi•10/20/24, 9:35 PM

Then you should use Arduino IoT Cloud

MMarvee Amasi Then you should use Arduino IoT Cloud

AbdullahOP•10/20/24, 10:42 PM

Is it possible to change the wifi network through the arduino iot cloud application?

Gigih•10/20/24, 11:00 PM

Hi, can anyone help me program a circuit? I'm a beginner and I have no idea how to do it

GGigih Hi, can anyone help me program a circuit? I'm a beginner and I have no idea how ...

techielew•10/21/24, 1:37 AM

What kind of circuit?

Ttechielew Are you back in Belgium?

kristof-at-embeetle•10/21/24, 3:02 AM

Nope. Still in Shenzhen.

AAbdullah Is it possible to change the wifi network through the arduino iot cloud applicat...

Marvee Amasi•10/21/24, 6:01 AM

It will allow u to manage device settings, u can add ur wifi credentials there too, and u wont have to be uploading new code each time you doin it. you can update the wifi network name SSID and password directly from the dashboard there

Mohan•10/21/24, 9:56 AM

How do I resolve this error ?

MMarvee Amasi It will allow u to manage device settings, u can add ur wifi credentials there ...

AbdullahOP•10/21/24, 11:48 AM

Do you mean that I can change it through the word network or is there another way?

Ttechielew What kind of circuit?

Gigih•10/21/24, 12:31 PM

Gigih•10/21/24, 12:31 PM

The circuit has a buzzer, an LED, 1 button (which is like a sensor), 1 button which is like a reset, an LCD screen, a switch and a Potentiometer. The project has to work as follows, as soon as I start simulating the project (which will be in Tinkercad) the word count and the zero below will appear on the LCD screen, as soon as I press the button that serves as a sensor, the counter it will show 1, ring the buzzer and turn on the LED at the same time and so on continuously, if for example I press the button 5 times, each time it is pressed it will appear on the LCD, depending on the time that the potentiometer marks and the buzzer and LED turn on together. The Potentiometer will serve as time in seconds to carry out the count, so for example if the Potentiometer has a delay of 4000 and I press the button, the counter will only show on the LCD after 4 seconds and the buzzer and the LED will also ring (the Potentiometer goes from 0 to 4000). When I press the switch down, it will show the Potentiometer information on the screen with the word Potentiometer at the top and the count in seconds below and when I move it up the switch will show the counter on the screen again. The other button will reset the counter

GGigih The circuit has a buzzer, an LED, 1 button (which is like a sensor), 1 button wh...

ZacckOsiemo•10/21/24, 12:41 PM

Nice plan, where are you currently having issues?

AAbdullah Do you mean that I can change it through the word network or is there another wa...

Marvee Amasi•10/21/24, 2:39 PM

Yh that network section is where u should enter ur wifi information

Marvee Amasi•10/21/24, 2:41 PM

Once you enter the SSID which is ur network name and then password, click that configure button to save the changes thrn try to connect to the new network

ZZacckOsiemo Nice plan, where are you currently having issues?

Gigih•10/21/24, 3:06 PM

I don't really know how to program what I want to do, I needed someone to help me program

GGigih I don't really know how to program what I want to do, I needed someone to help m...

ZacckOsiemo•10/21/24, 3:10 PM

Ah I see, I doubt you will find someone to help with that,
However if you are learning how to program and are stuck let us know we may be able to help.

ZZacckOsiemo Ah I see, I doubt you will find someone to help with that, However if you are le...

Gigih•10/21/24, 3:13 PM

Yes, I'm in the process, but I only know the basics, but I appreciate your attention

AbdullahOP•10/21/24, 3:15 PM

Thnx for help

AbdullahOP•10/21/24, 3:56 PM

I don't know how to flash arduino uno r4 wifi can someone help me?

AbdullahOP•10/21/24, 4:05 PM

I don't know how to do step 4

ZacckOsiemo•10/22/24, 9:03 AM

@32bitSaviour @Ming Is yocto just

west

west

but for embedded linux. As in does this just help me keep a handle on my builds rather than a million scripts?

ZZacckOsiemo @32bitSaviour @Ming Is yocto just `west`but for embedded linux. As in does this...

Ming•10/22/24, 9:04 AM

In essence - yes.
You still have a million scripts, they are just packaged nicely and called The Yocto Project!

MMing In essence - yes. You still have a million scripts, they are just packaged nice...

ZacckOsiemo•10/22/24, 9:07 AM

Aha that's insane that embedded linux is that huge, that the build tool is a project, as opposed to being shipped with a project.

ZZacckOsiemo Aha that's insane that embedded linux is that huge, that the build tool is a pro...

Ming•10/22/24, 9:10 AM

Embedded Linux is that huge. A typical distribution contains thousands of files - but then a Linux system is meant to be for more heavyweight tasks.

Ming•10/22/24, 9:11 AM

If I wanted ‘small’ then I would go hand-rolled or just use something like zephyr.

ZZacckOsiemo @32bitSaviour @Ming Is yocto just `west`but for embedded linux. As in does this...

Marvin•10/22/24, 9:11 AM

I think so. It is just scale that differs.

MMing If I wanted ‘small’ then I would go hand-rolled or just use something like zephy...

ZacckOsiemo•10/22/24, 9:11 AM

well you want a good build tool rather than a small one

MMarvin I think so. It is just scale that differs.

ZacckOsiemo•10/22/24, 9:12 AM

what is the scale difference would you say, I'm still looking at things very

baremetal

baremetal

Marvin•10/22/24, 9:17 AM

I mean scale in terms of features, entirely based off, what each of them offers - yocto would be just more complex.
For example, I think it would take a lot to have layering in zephyr but is it even needed.
And look at the learning curve on yocto.

MMarvin I mean scale in terms of features, entirely based off, what each of them offers ...

ZacckOsiemo•10/22/24, 9:25 AM

I know this has been explained before, but can you explain

layering

layering

to a layman?

ZZacckOsiemo I know this has been explained before, but can you explain `layering` to a layma...

Ming•10/22/24, 9:56 AM

Layering is simply having groups of related build instructions bundled in a 'layer'. You can then stack those layers on top of each other, e.g:

___________________________
| Application Build Stuff |
---------------------------
| System Build Stuff      |
---------------------------
| Board Booting Stuff     |
---------------------------

___________________________
| Application Build Stuff |
---------------------------
| System Build Stuff      |
---------------------------
| Board Booting Stuff     |
---------------------------

You can then build up your final system by adding in layers that contain the useful stuff you need (and therefore also don't include the layers of non-useful stuff you don't need)

This allows for complex systems to be almost pieced together in a way that is manageable.

ZZacckOsiemo what is the scale difference would you say, I'm still looking at things very `ba...

Ming•10/22/24, 10:05 AM

The scale is not clear cut.
For 'simple things' where for example you are 'just' reading sensor data and then either acting upon it to control something or pass that data upstream, a full blown Linux type system would probably be an overkill.
While I don't know RTOS's that well, but for more complex systems, where you may want to have task isolation (in Linux every task is isolated from each other, so that an issue in user-space with one task should not affect any other tasks) or if you just need more computational power, then Linux makes it easier, as the OS handles a lot of it for you.
The other things would be familiarity with the system (I'm always going to be biased towards Linux, as I 'think' in Linux and can see the solution faster in Linux) or if an essential library is only available for one particular OS.

ZZacckOsiemo I know this has been explained before, but can you explain `layering` to a layma...

Marvin•10/22/24, 10:05 AM

When you are building your bike each layer is a like a specific group of things that serve a distinct purpose (grouping things into a function), so a layer could be the engine or custom seats. All the layers stack up and you have your bike. Building from layering allows you to build (and easily modify) your bike. Swapping the engine would be as simple as replacing or modifying the engine layer. This modular system gives you flexibility to create what you need while making it easy to modify without complexity.

MMing _Layering_ is simply having groups of related build instructions bundled in a 'l...

ZacckOsiemo•10/22/24, 10:12 AM

so in this kind of world you don't need to rebuild layers that have not changed. I.e my OS and Drivers havent changed but my application has changed so just use a cache for the former 2 and re build my application.

MMarvin When you are building your bike each layer is a like a specific group of things ...

ZacckOsiemo•10/22/24, 10:14 AM

Almost like releases in elixir, but that's a bundle as opposed to a build system.

ZZacckOsiemo so in this kind of world you don't need to rebuild layers that have not changed...

Ming•10/22/24, 10:15 AM

In a Yocto Project - the caching actually happens at the recipe level. It is more like a

make

make

system - it only rebuilds the package if the recipe has changed.

Ming•10/22/24, 10:18 AM

For layers - think of them more as bundles of functionality.
I have a great CLI system and I now want to add a GUI. All I need to do is add a Graphical layer, say XFCE and I can then select which recipes from that layer I actually want to use in my project.
Or, I have a great system from a RaspberryPi but now I want to build it for an ODroid. All I need to do is swap my RaspberryPi layer for the ODroid layer - keeping all the other layers in place.

MMing In a Yocto Project - the caching actually happens at the recipe level. It is mor...

ZacckOsiemo•10/22/24, 10:20 AM

Miiiing, what in the world is a recipe. Is this like a list of dependecies and their versions?

how ?

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