DevHeads IoT Integration Server•2y ago

@wafa_athmani you've worked on ROS, right?

Ttechielew @wafa_athmani you've worked on ROS, right?

cymric•5/20/24, 8:37 PM

ROS 2 to be exact

Ccymric ROS 2 to be exact

wafa_ath•5/20/24, 8:53 PM

Hello @cymric ,well ROS2 official website provide tutorial for beginners you can start from there,or if you wanna something specific tell us

RRenuel Roberts I would embed a tiny computer system in a pair of sneakers that analyzes your ru...

Marvee Amasi•5/20/24, 9:40 PM

@Enthernet Code seems you are a fitness enthusiast, this would be cool. A potential for embedded systems to better athletic performance and personal well-being of athletes

Saßì•5/21/24, 2:53 AM

@Strong

Streamer @Jão @santosh09238569444@gmail.com Welcome to the community! We're eager to learn more about you. Can you introduce yourself and tell us about your professional life?

Ttechielew Any specific type of work you're looking for? Where are you located?

Daradrio•5/21/24, 3:35 AM

As entry level not that specific but like to work on bare metal systems . Currently I am situated in US.

DDaradrio As entry level not that specific but like to work on bare metal systems . Curren...

Umesh Lokhande•5/21/24, 4:27 AM

Hey @Daradrio Great! if you're looking to get your hands dirty with embedded protocols like Serial UART, I2C, and SPI with 32-bit MCU like STM32 Cortex-M4 (backed by live project and use cases). I invite you to join this Sunday's Engineering Hour. I'm sure you'll find these upcoming events helpful. Have a good day!

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big-D•5/21/24, 10:24 AM

hello, i want to ask
when i try to install libjasper-dev package on debian 12 (bookworm) i get this error
"-- Could not find Jasper (missing: JASPER_LIBRARIES JASPER_INCLUDE_DIR) "

Bbig-D hello, i want to ask when i try to install libjasper-dev package on debian 12 (...

nour_oud•5/21/24, 11:43 AM

It has been moved to 📦-middleware-and-os, Here: 📦-middleware-and-oserror while installing libjasper-dev package on debian 12 (bookworm)

Saßì•5/22/24, 3:06 AM

Friendly reminder about Upcoming Event
https://discord.com/invite/A9fsjr4K?event=1240826204148203561

SSaßì ** Friendly reminder about Upcoming Event** https://discord.com/invite/A9fsjr4K?...

techielewOP•5/22/24, 5:03 AM

We've got a special guest joining us for this one. A friend of mine, Iain Menzies-Runciman (https://www.linkedin.com/in/iainmr/), will be joining to share his experience with Linux, which spans supercomputers, resource-constrained embedded devices, and even trainings and courses. Join us to trade Linux war stories

@Event Pings

Naren_QCOM•5/22/24, 5:48 AM

Does anyone worked on SIM800L module with ESP32 using ESP-IDF framework?

I tried the basic pppos_client esp-idf example, but it's not working for me

I'm getting tthe following errors
E (10484) esp-modem: esp_modem_dte_send_cmd(256): process command timeout
E (10484) dce_service: esp_modem_dce_sync(225): send command failed
E (10484) sim800: sim800_init(159): sync failed

Yyoucef_ali hmm modeste data

InsightMike•5/22/24, 11:59 AM

Yes, the low data rates enable the very long range. It's also important to note that, if you follow the specification, that the data rate isn't under your control, it adapts to the RF conditions. You can force certain data rates to fit your application, but then you will have range trade-offs and may give up full interoperability with other LoRaWAN devices (which may or may not be important to you).

NNaren_QCOM Does anyone worked on SIM800L module with ESP32 using ESP-IDF framework? I trie...

wafa_ath•5/22/24, 7:06 PM

hello @iamnarendrans Have you tried using a serial terminal program to communicate directly with the SIM800L using AT commands? just to know whether the problem lies with the communication between the ESP32 and SIM800L (hardware or software configuration)

wafa_ath•5/22/24, 7:08 PM

also A voltage regulator might be necessary if your power supply isn't stable. What is the voltage level you're providing to the SIM800L?

Wwafa_ath hello @iamnarendrans Have you tried using a serial terminal program to communic...

Naren_QCOM•5/22/24, 7:15 PM

I've tried and verified.
It was working while I'm trying with serial AT commands

But that ESP-IDF pppos_client example is not working

IInsightMike Yes, the low data rates enable the very long range. It's also important to note...

youcef_ali•5/22/24, 7:29 PM

Thanks you

NNaren_QCOM Does anyone worked on SIM800L module with ESP32 using ESP-IDF framework? I trie...

youcef_ali•5/22/24, 7:31 PM

I have worked pppos with sim7600 i take to much time to make it work and not 100%, the issue is in the synchronization in the init, the pppos send At command and wait for feed back, meanwhile the sim module is not ready yet that causes timeout

Yyoucef_ali I have worked pppos with sim7600 i take to much time to make it work and not 100...

Naren_QCOM•5/22/24, 7:32 PM

How did you overcomed that?

NNaren_QCOM How did you overcomed that?

youcef_ali•5/22/24, 7:33 PM

First Using delays, and second do multiple attempts if synchronisation is failed do it again

Yyoucef_ali First Using delays, and second do multiple attempts if synchronisation is failed...

Naren_QCOM•5/22/24, 7:35 PM

Let me try that. Do you have any example code? If yes, can you please share it to me ?

youcef_ali•5/22/24, 7:36 PM

I'll look for the code

NNaren_QCOM Let me try that. Do you have any example code? If yes, can you please share it t...

youcef_ali•5/22/24, 7:36 PM

Not sim800

Naren_QCOM•5/22/24, 7:38 PM

It's ok man, just for reference.
I can understand the flow and make changes for sim800 according to my requirements

NNaren_QCOM It's ok man, just for reference. I can understand the flow and make changes for ...

youcef_ali•5/22/24, 7:44 PM

NNaren_QCOM It's ok man, just for reference. I can understand the flow and make changes for ...

youcef_ali•5/22/24, 7:47 PM

Here i give additional time for the modem to be ready, and make sure is turned on, and if the sync is failed restart the modem and try again

ЯΣJIП•5/23/24, 5:21 AM

LMtx•5/23/24, 7:23 AM

Is it possible to manage a global-scale IoT deployment in a no-code/low-code manner?

By global-scale IoT deployment, I mean an Internet of Things system consisting of thousands of devices and tens of applications. Effective maintenance of this complexity requires automation.

Traditionally, we used code to automate tasks, reduce support costs, and enable scalability. Is there a better way?

Can you recommend a no-code/low-code IoT platform that effectively supports global-scale deployments?

Your insights and suggestions are highly valued. Please share your recommendations!

Ben•5/23/24, 10:27 AM

Hi all,I'm working with the ESP32-CAM for recognizing QR codes. Everything worked perfectly, and I was able to recognize QR codes until I used SoftSerial to transmit the SBUS signal. I can receive the SBUS signal via RX2, but in my project, I need to transmit it to the flight controller.

Ben•5/23/24, 10:28 AM

Ben•5/23/24, 10:31 AM

Here is just the camera configuration and the two UARTs I need to use. The problem occurs when I use SoftSerial.

arudino1.91KB

Ben•5/23/24, 10:33 AM

Can anyone please help me solve this problem? I'm trying to send the SBUS signal via a GPIO pin, and I'm not sure if that's going to work.

Ben•5/23/24, 10:34 AM

ЯΣJIП•5/23/24, 11:01 AM

BBen Hi all,I'm working with the ESP32-CAM for recognizing QR codes. Everything worke...

wafa_ath•5/23/24, 1:47 PM

the issue appears to be caused by the use of Software Serial library,Use (UART) instead of Software Serial, Here's an example of the configuration on how you could use hardware UART for transmitting the SBUS signal

BBen Here is just the camera configuration and the two UARTs I need to use. The probl...

Renuel Roberts•5/23/24, 6:35 PM

Am unable to access and see your code but from your question you can use the code below:

#include <HardwareSerial.h>
#include <Wire.h>
#include "esp_camera.h"
#include "QR_Code.h"

HardwareSerial MySerial(2); // Use Serial2 for SBUS

void setup() {
Serial.begin(115200);
MySerial.begin(100000, SERIAL_8E2, RX2, TX2); // Initialize SBUS with appropriate baud rate and pins

// Camera initialization code
camera_config_t config;
config.ledc_channel = LEDC_CHANNEL_0;
config.ledc_timer = LEDC_TIMER_0;
config.pin_d0 = Y2_GPIO_NUM;
config.pin_d1 = Y3_GPIO_NUM;
config.pin_d2 = Y4_GPIO_NUM;
config.pin_d3 = Y5_GPIO_NUM;
config.pin_d4 = Y6_GPIO_NUM;
config.pin_d5 = Y7_GPIO_NUM;
config.pin_d6 = Y8_GPIO_NUM;
config.pin_d7 = Y9_GPIO_NUM;
config.pin_xclk = XCLK_GPIO_NUM;
config.pin_pclk = PCLK_GPIO_NUM;
config.pin_vsync = VSYNC_GPIO_NUM;
config.pin_href = HREF_GPIO_NUM;
config.pin_sscb_sda = SIOD_GPIO_NUM;
config.pin_sscb_scl = SIOC_GPIO_NUM;
config.pin_pwdn = PWDN_GPIO_NUM;
config.pin_reset = RESET_GPIO_NUM;
config.xclk_freq_hz = 20000000;
config.pixel_format = PIXFORMAT_JPEG;

if (psramFound()) {
config.frame_size = FRAMESIZE_UXGA;
config.jpeg_quality = 10;
config.fb_count = 2;
} else {
config.frame_size = FRAMESIZE_SVGA;
config.jpeg_quality = 12;
config.fb_count = 1;
}

// Initialize the camera
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf("Camera init failed with error 0x%x", err);
return;
}

// QR Code recognition setup
// ...
}

void loop() {
// QR Code recognition logic
// ...

// SBUS communication logic
if (MySerial.available()) {
// Read and transmit SBUS data
while (MySerial.available()) {
int incomingByte = MySerial.read();
// Process SBUS data
}
}

// Attach your code logic here
}

This only works if you use the hardware esp32 ports instead of the software

Ben•5/23/24, 8:33 PM

With both codes, I can only receive an SBUS signal via RX2 (pin 16). However, I need to send the same SBUS signal via TX, which is not available on the ESP32-CAM. That's why I created a softSerial. The problem is that when I use the camera, everything works perfectly except the camera itself, which gives the error (GPIO is already installed)

Ben•5/23/24, 8:37 PM

I'm using two ESP32-CAMs. One ESP32-CAM sends frames to a laptop and receives x, y, z coordinates via WiFi. These values are then sent to the other ESP32 via I2C. The ESP32 generates a PWM signal based on these values and generates an SBUS signal. However, this is not an optimal solution

Ben•5/23/24, 8:38 PM

i hope that makes sense

SSaßì ** Friendly reminder about Upcoming Event** https://discord.com/invite/A9fsjr4K?...

techielewOP•5/23/24, 9:24 PM

Hey Linux lovers, @1158820847566471281 and @1158822820860674098, don't forget that tomorrow morning at 15:00 GMT we're going to be diving into the world of embedded linux, supercomputers, and open source with Iain Runciman. Learn how Linux has evolved and how you can evolve with it through shared experience.

See you there! https://app.livestorm.co/devheads-community/devheads-weekly-office-hours-1

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techielewOP•5/24/24, 2:07 PM

@Event Pings! We'll see you in less than an hour for our weekly Office Hours: https://app.livestorm.co/devheads-community/devheads-weekly-office-hours-1

nour_oud•5/24/24, 4:44 PM

Welcome @Ming to the community! Can you introduce yourself and tell us about your professional life?

Ming•5/24/24, 4:53 PM

Quick Hi to all. I'm Ming (Iain Menzies-Runciman). I have been working with Unix/Linux for over 30 years ranging from high-end supercomputers through to the Embedded Linux systems that I currently specialise on. I spend my days building Yocto systems, integrating OTA Updates with Mender and interfacing IoT systems with cloud-based services. I have just presented on the weekly office hours - so for anyone who missed it, go catch the replay!

MMing Quick Hi to all. I'm Ming (Iain Menzies-Runciman). I have been working with Unix...

Camila_99$$•5/24/24, 5:01 PM

Hi Mr. Ming ! I was there watching, and your presentation was very useful and interesting. Thank you

MMing Quick Hi to all. I'm Ming (Iain Menzies-Runciman). I have been working with Unix...

wafa_ath•5/24/24, 5:32 PM

Hi Mr. @Ming , i was attending too , thank you so much for sharing your knowledge with us , it was really interesting and aspiring

Ben•5/25/24, 7:35 AM

Guys, I'm trying to connect an ESP32-CAM to an ESP32 using the I2C protocol. Which pins on the ESP32-CAM should I use? I used pins 14 and 15, but it is not working.

BBen Guys, I'm trying to connect an ESP32-CAM to an ESP32 using the I2C protocol. Whi...

Accur4te•5/25/24, 10:04 AM

Try d21 and d22

aymen ammari•5/25/24, 10:09 AM

Hi everyone, I'm looking for a sensor to use as body heat sensor for medical project, I'm trying to use LM35 with esp32 and IOT system but my problem is that I don't find it suitable (casing)
So any suggestions on what to use, and thank you in advance

AAccur4te Try d21 and d22

Ben•5/25/24, 11:44 AM

There is no d21 and d22 in esp32cam

Ben•5/25/24, 11:46 AM

I also tried to use Bluetooth. The master is sending data correctly, but the slave isn't even connecting to the master

@wafa_athmani you've worked on ROS, right?

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