@electro_coco I'd suggest reading https://www.oreilly.com/library/view/embedded-programming-with/978

@electro_coco I'd suggest reading https://www.oreilly.com/library/view/embedded-programming-with/9781838821043/. Some additional resources and articles on Modern C++ in Embedded https://semblie.com/modern-cpp/ and https://www.embeddedrelated.com/blogs-1/nf/Amar_Mahmutbegovic.php

Marvee Amasi•3/27/24, 4:07 PM

Please I need help on this guys , I am exploring STM32 microcontroller development with RTOS (micrium). Any tips for calculating thread stack usage efficiently?

Bboualleg sabrina hope these channels will help you

electro_coco•3/27/24, 4:37 PM

thank you

UUmesh Lokhande @electro_coco I'd suggest reading https://www.oreilly.com/library/view/embedded-...

electro_coco•3/27/24, 4:44 PM

thank you

Ttechielew Here's an Arduino client for MQTT: https://www.arduino.cc/reference/en/libraries...

Accur4te•3/27/24, 5:35 PM

no this are also powerful

Accur4te•3/27/24, 5:38 PM

so as per the judge he suggested that instead of a heavy protocol like mqtt or gsm go with POE ( power over ethernet ) and instead of esp32 you can just use any 60 cent chip it will do the work as i just need to read 5 values from 5 different sensors and upload it to internet via POE , but he didn't mention any specific cheap so i want to know what chip was he talking about

AAccur4te so as per the judge he suggested that instead of a heavy protocol like mqtt or g...

Navadeep•3/27/24, 8:26 PM

PoE should work as well. It might be easy to integrate while installation and is a fully wired method unlike other popular wireless IoT.
The software-stack and processing you need in PoE case might get complex and not all MCUs come with ethernet peripheral. For example, say RA6M2. It comes with ethernet MAC (exposing RGMII lines) and an external PHY chip say DP83867 will be required to further down connect with the RJ-45 port having twisted pair lines.
Also, the POE requires it's set of chips - usually a rectifier IC and PoE PD IC for handshaking to extract power from the twisted pair lines (ex: https://ww1.microchip.com/downloads/en/Appnotes/AN3533-PD70210AAL_and_PD70211_System_Layout_Guidelines.pdf)

System may look like:

[Sensors] --> SPI/I2C--> [MCU]-->RGMII-->[PHY]-->[RJ-45] <---- [PoE Connector]
|
Power <--[PoE PD]<-- [Rectifier]<--

MMarvee Amasi Please I need help on this guys , I am exploring STM32 microcontroller developme...

Marvee Amasi•3/27/24, 9:54 PM

Please can anyone help me with this?

techielew•3/27/24, 10:47 PM

@IoT Cloud @Edge Networking devs won't want to miss @LMtx outlining the fundamentals of MQTT topic structures in tomorrow's Ask a Developer demo. Check it out tomorrow at 15:00 GMT time:

Server event: https://discord.gg/devheads?event=1222677100885184552
Server discussion thread: 📡-edge-networkingAsk a Developer: Understanding MQTT Topic Structures
YouTube link: https://youtu.be/_BI8vBpUGEI

YouTubeDevHeads

DevHeads Demo: Understanding MQTT Topic Structures

MQTT is one of the most popular IoT communications protocols for wireless sensor networks. Its publish-subscribe architecture can streamline, simplify, and scale the creation and provisioning of potentially massive edge networks—if you structure the pubsub technology appropriately from the start.

In his time at AWS IoT, consultant and DevHeads ...

Original message was deleted

techielew•3/28/24, 2:10 AM

Hey Guillotine, moving to #off-topic but thanks for the offer!

info3917APP•3/28/24, 2:14 AM

Hello everyone , I am doing a project on automatic trash detection and collecting , in that the whole project weights about 15kg to move that body to a torque value of 2.2.75n-m is required so provide me some dc motors also the drivers of the dc motors ... with less price

Umesh LokhandeAPP•3/28/24, 2:14 AM

History of MQTT- One of the most popular IoT Protocol

youcef_aliAPP•3/28/24, 2:14 AM

In Wire Shark how to capture all the traffic of a given address ? the traffic i'm lookinng for brtween two machine 192.168.1.2 and 192.168.1.3, my ip address is 192.16831.4

Yyoucef_ali In Wire Shark how to capture all the traffic of a given address ? the traffic i...

techielew•3/28/24, 4:40 AM

@Edge Networking

NNavadeep PoE should work as well. It might be easy to integrate while installation and is...

Accur4te•3/28/24, 5:15 AM

ohk ohk got it , thanks a lot

Iinfo3917 Hello everyone , I am doing a project on automatic trash detection and collecti...

Marvee Amasi•3/28/24, 5:28 AM

Good day @info3917 . Looking at your project requirements, you might want to look into DC motors with high "torque to weight" ratios. Some options to look at are brushed or brushless DC motors with gearboxes for higher torque. So, for motor drivers, you can consider H-bridge motor drivers or motor driver ICs like L298N or L293D, which are cost-effective. Make sure you check compatibility and power requirements before making your decision.

Donald Will•3/28/24, 5:58 AM

Anyone familiar with nordic microcontroller https://www.digikey.my/en/supplier-centers/nordic-semiconductor ?

Nordic Semiconductor Distributor | DigiKey Electronics...

DigiKey now has Nordic Semiconductor Parts! Nordic Semiconductor is at the forefront of this wireless revolution.

Saßì•3/28/24, 5:58 AM

@kumarsingh Welcome! Can you let us know a bit about your technical background, what brings you to DevHeads, and what you're looking to learn/contribute?!

MMarvee Amasi Check out this pdf , you will get to learn much about this @https://www.google.c...

Donald Will•3/28/24, 5:59 AM

thank you is a good resources

DDonald Will thank you is a good resources

Marvee Amasi•3/28/24, 6:00 AM

You are welcome

SSaßì @kumarsingh Welcome! Can you let us know a bit about your technical background, ...

kumarsingh•3/28/24, 6:18 AM

Yes, Thanks for adding me in this group!!

How are you all my dear friends?

Me and my team developed 4+ IIoT & IoT project for industrial automation and Home automation.

In that application I get lost of experience which I share here with all of you

Learn flavour management
API integration and device communication
Use AWS services like IoT core, Dynamo db
Smart devices add and operate
Live devices updating via mqtt
Automation of devices
Operate devices without internet via app
Automation based on location
Camera streaming and management
Devices sharing with family
Alexa integration
More than 200 devices integration
And many more things

Kkumarsingh Yes, Thanks for adding me in this group!! How are you all my dear friends? Me ...

techielew•3/28/24, 6:21 AM

Wow that's awesome Kumar. You here to help or learn or both?

kumarsingh•3/28/24, 6:24 AM

Both my dear friend

Kkumarsingh Both my dear friend

techielew•3/28/24, 6:52 AM

We're happy to have you! You should check out our Office Hours and Engineering Hour sessions on Friday and Sunday, respectively. We also have some cool demos coming out. And if you're interested in anything you don't see or have suggestions on how we can improve, we're all ears. Just let us know!

wafa_ath•3/28/24, 8:09 AM

Good morning,I have a project in which I am using Android application for object detection
Currently my phone camera opens when I open the application and it starts detecting the objects
But I want to integrate the esp32 cam with android so that esp32 video stream come to android and should be shown at phone's screen
Basically it uses phone camera for object detection now it should use esp32 cam
Can anyone help?

Wwafa_ath Good morning,I have a project in which I am using Android application for object...

Umesh LokhandeOP•3/28/24, 9:45 AM

You can run a Webserver on a ESP32 CAM Module. And access it from Android App which can be made by using simple MIT App Inventor. So that the Mobile App will access a video stream over HTTP as a client. Also, you can add additional capabilities like the object detection algorithm running on ESP32 to acces camera stream connected to it.

Wwafa_ath Good morning,I have a project in which I am using Android application for object...

aymen ammari•3/28/24, 9:53 AM

Wich app you are using, it mabe has a sitting to change cam source and his choosing phone cam us default

Saßì•3/28/24, 12:58 PM

@kumarsingh Welcome! Can you let us know a bit about your technical background, what brings you to DevHeads, and what you're looking to learn/contribute?!

Saßì•3/28/24, 12:58 PM

@gggrunt Welcome! Can you let us know a bit about your technical background, what brings you to DevHeads, and what you're looking to learn/contribute?!

gggrunt•3/28/24, 1:03 PM

I got invite from Shakila and just checking what it is about

Wwafa_ath Good morning,I have a project in which I am using Android application for object...

Ben•3/28/24, 1:41 PM

I haven't worked with Android applications before, but I tried connecting the ESP32-CAM. I used the example called 'CameraWebServer,' which gave me an address. I put this address into my Python script, and it worked. I'm not sure if I answered your question correctly.

Ben•3/28/24, 1:48 PM

@wafa_athmani Have you tried calibrating the ESP32-CAM? I ask because I need its parameters for my project. I've already tried, but the results aren't accurate.

UUmesh Lokhande You can run a Webserver on a ESP32 CAM Module. And access it from Android App wh...

wafa_ath•3/28/24, 2:00 PM

Actually i tried your solution by using flask library and then used kodular WebViewer، i completely changed the app but works very nicely and smoothly thank you for the idea

UUmesh Lokhande You can run a Webserver on a ESP32 CAM Module. And access it from Android App wh...

Ben•3/28/24, 2:06 PM

The ESP32-CAM can only capture frames, it does not support functionalities such as opencv

BBen The ESP32-CAM can only capture frames, it does not support functionalities such ...

Umesh LokhandeOP•3/28/24, 2:14 PM

To use OpenCV OpenCV and runing inference (ML)inference (ML). I suggest using RPi with HQ Camera module

BBen @wafa_athmani Have you tried calibrating the ESP32-CAM? I ask because I need its...

wafa_ath•3/28/24, 2:25 PM

import time
import esp32_camera # Replace with your ESP32-CAM library

camera = esp32_camera.Camera()
camera.set_resolution((320, 240)) # Adjust as needed

camera.capture_frame()

img_data = camera.frame
format (assuming RGB format)
img = Image.frombytes('RGB', camera.frame.shape[:2], img_data)

img.save('f3.png', 'PNG')

camera.deinit()

print("Image captured and saved as f3.png!")

This is the code i used to take a pic , i hope it would help you

UUmesh Lokhande To use `OpenCV ` and runing `inference (ML)`. I suggest using RPi with HQ Camera...

Ben•3/28/24, 2:34 PM

RPi is too expensive compared to the ESP32CAM. Can I still use it for capturing frames? I plan to process the data on my laptop and then send it to the ESP32 via WiFi

Ben•3/28/24, 2:35 PM

And my system doesn't necessarily need to be real-time strict

Wwafa_ath import time import esp32_camera # Replace with your ESP32-CAM library camera =...

Ben•3/28/24, 2:37 PM

I've already tried to calibrate the camera. I need the parameters you obtained to compare them with mine.

Saßì•3/28/24, 2:51 PM

@Q Welcome! Can you let us know a bit about your technical background, what brings you to DevHeads, and what you're looking to learn/contribute?!

BBen RPi is too expensive compared to the ESP32CAM. Can I still use it for capturing ...

Umesh LokhandeOP•3/28/24, 3:02 PM

Yes, most of my experience is with RPi and its camera modules. But I'm not sure about ESP32 CAM and its limitations at this moment especially, with capturing frames.

LMtx•3/28/24, 4:22 PM

I plan to visit the Embedded World expo in Nuremberg on April 9th, 2024. If you're interested in chatting about IoT-related topics, don't hesitate to reach out.

Let's connect and exchange ideas!

LLMtx I plan to visit the Embedded World expo in Nuremberg on April 9th, 2024. If you'...

techielew•3/28/24, 9:23 PM

Are you only going to be there for the one day?

LLMtx I plan to visit the Embedded World expo in Nuremberg on April 9th, 2024. If you'...

aymen ammari•3/28/24, 9:56 PM

We would like to know more about it

Camila_99$$•3/28/24, 10:31 PM

Good evening guys,I’m unable to get my TFT ILI9488 480x320 screen to work with the TFT_eSPI.h library

!thank you for your help.

406399•3/28/24, 11:50 PM

good afternoon
can i use esp32 cam with raspberry pi to detect object ?

aymen ammari•3/29/24, 12:23 AM

Yes, you can use an ESP32-CAM with a Raspberry Pi to detect objects. You can use the ESP32-CAM to capture images or video of the scene, then transfer that data to the Raspberry Pi for object detection using software libraries like OpenCV or TensorFlow.

Ben•3/29/24, 2:32 AM

Guys, who has tried to calibrate an ESP32-CAM? I've tried it but didn't achieve good results. Please, if anyone has tried it, could you send me the parameters of the camera?

BBen Guys, who has tried to calibrate an ESP32-CAM? I've tried it but didn't achieve ...

Wanted (J.R)•3/29/24, 2:34 AM

me not. still not got any further with what i tryed to do

Ben•3/29/24, 2:38 AM

what are you planning to do with ESP32

Wanted (J.R)•3/29/24, 2:40 AM

just some audio, input and vouice controlled

@electro_coco I'd suggest reading https://www.oreilly.com/library/view/embedded-programming-with/978

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