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The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.

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Boss lady

9/27/2024

How do I implement real-time inference on ESP32 and reduce latency for image recognition

Still based on my project image recognition system that can analyze images of tissue samples, identify malignancies, and predict possible symptoms and causes. How do i implement real-time inference and display predictions on the LCD or send data to the cloud? Cause my Inference latency is too high for real-time application, what's the best way to implement this to ensure that Inference time does not remains above acceptable thresholds for real-time use.

Enthernet Code

9/27/2024

How do I achieve a fully functional voice-controlled system with reliable command recognition

How do i achieve a fully functional voice-controlled system with reliable command recognition and LED control? Am done with my project on developing a home automation voice-controlled system using MicroPython and TinyML on an ESP32 microcontroller to recognize specific voice commands ("turn on" and "turn off") for controlling an LED. It runs smoothly as intended with no errors but sometimes doesn't respond to the voice command, how can i achieve consistent voice recognition and LED control with the ESP32, leveraging TinyML and MicroPython....

Daniel kalu

9/26/2024

Troubleshooting WiFi Connection Issues and High Latency with ESP32 CAM on Isolated Network

I'm working with the ESP32 CAM WiFi module and encountering two issues. It experiences high latency on my home network, and more concerning, it fails to obtain an IP address on an isolated network created with a Linksys WRT54 router (firmware v 4.21.1), despite other devices connecting successfully. The ESP32 CAM works fine on my home network using the standard 'CameraWebServer_Test' code. When attempting to connect to the isolated network, the ESP32 CAM (firmware version 1.0.6) produces the following error logs and debug messages: "WiFi.begin() failed!"...

Solution:

I rechecked the settings as you suggested and noticed that the issue is indeed related to the DHCP settings on the Linksys WRT54 router. I found that the DHCP server was not enabled on the router, which was causing the ESP32 CAM to fail obtaining an IP address. However, I also noticed that the router's firmware version is quite old and may not fully support the ESP32 CAM's WiFi capabilities. which is will consider upgrading the router's firmware or using a different router with more modern WiFi standards. Thank you for pointing me in the right direction! 🙏...

youcef_ali

9/24/2024

Preventing data loss on ESP32 during MQTT disconnects

Greetings every one what you do if you iot device infield get disconnected to wifi and you dont have anyother connectivity available? How you can ensure that data is not lost has anyone did something like this on esp32...

Daniel kalu

9/13/2024

How can I resolve BLE connection issues with ESP32 and Android 11 using ArduinoBLE?

Hi Devs, I'm using an ESP32 as a BLE peripheral device to broadcast sine values to my Android 11 phone via the nRF Connect app, i am using the ArduinoBLE library on the ESP32. However, I'm encountering a connection issue. After disconnecting, I get a 'couldn't connect' error message when trying to reconnect. The only workaround I've found is to forget the device, scan for it again, and then connect. I'm getting the following error message in my serial monitor: `E (23456) BLE: Connection failed,...

Dtynin

9/13/2024

Configuring AVR128DA48 for Real-Time CAN Bus Communication

I'm designing the system architecture for a Smart Industrial Monitoring System using the AVR128DA48 microcontroller and the CAN Bus protocol for communication between multiple sensors and a controller. I've chosen temperature, pressure, and vibration sensors. I plan to set up the microcontroller as the main CAN node, which collects data and processes it locally. Could you confirm if this architecture would work, or suggest any changes? Also, how can I configure the AVR128DA48 to handle data transmission in real-time over CAN, ensuring that no data loss occurs when dealing with multiple nodes?...

Solution:

Hi @Dtynin This architecture u picked is well-suited for your application, given the robustness of the CAN Bus protocol in industrial environments. To ensure reliable, real-time data transmission: Assign unique CAN IDs to each sensor, with higher priority for critical sensors like vibration. Optimize the CAN Bus speed according to your system’s bandwidth and distance requirements, typically between 125 kbps and 1 Mbps....

Daniel kalu

9/11/2024

ESP32-Pico Failing to Publish MQTT Messages Due to Payload Size Exceeding Broker's Limit

Hey guys while sending sensor data from an ESP32-Pico to an MQTT broker,And combining multiple sensor readings into a single MQTT message, the payload size exceeds the broker's limit. As a result, the publish operation fails, and the transmission is interrupted, causing data loss. Error Message: E (48532) MQTT_CLIENT: Payload size exceeds the maximum limit The error occurred during testing when adding additional sensor data to the MQTT message, leading to transmission failures shown on the serial monitor. Any idea why the ESP32-Pico fails to publish MQTT messages when the payload size exceeds a certain threshold, leading to transmission interruptions?...

Boss lady

9/11/2024

How do I set up UART communication between BeagleBone Black and Esp32?

Hello, I’m working on a light intensity monitoring system using BeagleBone Black and a Esp32. How do I set up UART communication between BeagleBone Black and Esp32? Because am receiving no data from microcontroller, I have checked checked UART pin connections and baud rate settings. ```python...

Daniel kalu

9/11/2024

Why Does the MQTT Connection on ESP32-Pico Frequently Disconnect with Error errno=113?

Hii while developing an loT application with ESP32-Pico to monitor environmental conditions and send data to an MQTT broker. The MQTT connection is set to QoS 1 with a 60-second keep-alive interval. However, the connection frequently drops after a few minutes, requiring the device to reconnect, leading to data transmission delays. Error Message: E (10234) MQTT_CLIENT: Error transport connect failed, errno=113 The error was discovered during continuous data transmission tests, where the ESP32-Pico repeatedly lost its connection to the MQTT broker, displaying the error on the serial monitor....

aymen ammari

9/9/2024

ESP32 BLE Reconnection Issue with REMOTEXY App

Hi, DevHeads I'm using ESP32. I'm now trying out the BLE code to broadcast sine values to my Android 11 phone using REMOTEXY app. However, it doesn't get connected, a pop up message appears " couldn't connect" whenever I try to reconnect after disconnecting. I have to forget the device, scan for the device, and then connect to it. Are there any workarounds to this? Any advice for it to work correctly? this is the code I'm working with...

Solution:

move BLEDevice::startAdvertising(); inside the onDisconnect callback. Also, ensure pServer->getAdvertising()->start(); is called without BLEDevice::stopAdvertising();. This helps the ESP32 automatically reconnect without having to forget and rescan the device.

Daniel kalu

9/4/2024

Best Tool to Diagnose Intermittent Wi-Fi Drops on ESP32 in Home Automation Project?

Hey guys in my current ESP32-based home automation project, I'm experiencing intermittent Wi-Fi connection drops, particularly when multiple devices are connected simultaneously. The serial monitor logs the error: "E (22345) wifi: Disconnect reason: 202 (AUTH_FAIL)." I've already verified the network credentials and ensured the router is functioning properly. What tool or method should I use to diagnose and resolve this Wi-Fi connectivity issue: Wireshark, an ESP32 Wi-Fi Sniffer, or a Spectrum A...

Solution:

To diagnose intermittent Wi-Fi connection drops on your ESP32 project, use the ESP32 Wi-Fi Sniffer to capture and analyze Wi-Fi traffic, which is ideal for identifying authentication failures or unauthorized disconnects. If interference or congestion is suspected, a Spectrum Analyzer can help pinpoint external sources like other networks or RF devices. Wireshark is best if you need to investigate deeper network-level issues such as TCP/IP errors. Start with the sniffer and use additional tools a...

Enthernet Code

9/4/2024

ESP32 BLE Fails to Advertise or Get Detected by Mobile App in Temperature Monitoring Project

Hello guys ahv gotten to a new stage on my project simple temperature monitoring system using MicroPython on a Zephyr RTOS-supported microcontroller, such as the ESP32, and transmit the data over Bluetooth Low Energy (BLE) to a mobile app. Am currently transmit the temperature and humidity data over Bluetooth Low Energy (BLE) from the ESP32 to a mobile app but BLE fails to advertise or the mobile app does not detect the ESP32. Here's my code ```python...

Camila_99$$

8/30/2024

How to Force HTTP Requests to Timeout on ESP32 When Router Freezes?

Hello! I've had a setup running for several months now, which makes HTTP requests to several devices on home WiFi network (the router is part of a Freebox). Everything works quite well, except for certain moments when I experience "freezes" of several seconds during a request. These freezes often disappear if I restart my Freebox (and thus the router). To avoid these freezes, I’m looking for a way to force the request to exit if it hasn’t succeeded within a second (for example). Here is the current code of one of my HTTP requests (launched every 5 seconds from the loop of my program): ...

Solution:

Hi @Camila_99$$ in other to avoid freezes during HTTP requests, set both a connection timeout (http.setConnectTimeout(500);) and a response timeout (http.setTimeout(1000);). This will make sure the request stops if it doesn't finish within the given time. For even better performance, you might want to use asynchronous requests with ESPAsyncHTTPClient to keep your main loop running smoothly.

Boss lady

8/28/2024

Troubleshooting HDMI Output on BeagleBone Black: No Signal Issue

Hello guys, I'm developing a digital signage project using the BeagleBone Black (BBB) running a custom Embedded Linux image. The project requires displaying dynamic content on an HDMI monitor. However, the HDMI display is not working, and I am unable to get any output on the screen. I did configure the HDMI output by ensuring that the BBB is set to output in the HDMI port

sudo nano /boot/uEnv.txt

sudo nano /boot/uEnv.txt

...

Solution:

Hey, @Boss lady try using a power supply with a higher current rating, a weak power supply might not provide enough power for HDMI output too. Ensure that your BBB is receiving sufficient power also.

aymen ammari

8/28/2024

How to Fix USB Serial "DEVICE_DESCRIPTOR_FAILURE" Issue with MKR Device?

I've problem that USB serial cannot detected on device manager. The message is "USB\DEVICE_DESCRIPTOR_FAILURE". Did everyone here experience the same problem when connecting MKR device for the first time. Please assist. Thank you.

Solution:

This is not much of an issue, what you will need to do is click on the unknown device, the update the driver manually from your system, but if it didnt work then you will go online and download it. For example I think i have had this issue with esp32 CP2012 driver, so i went to the manufacturers website and download the driver and installed manually and it worked

Camila_99$$

8/25/2024

How to resolve network error 61 when sending an email with SIM800C module using AT commands

Hello, I want to send an email using AT commands from a SIM800C module with the Free operator. When executing the AT+SMTPSEND command, I get error number 61: (Network error). The commands for creating the email and configuring the server are all validated. This module is also used to send SMS and I have no difficulties with that part. Should I change a setting, and if so, which one, or is this an incompatibility related to the operator? Thank you...

Solution:

I found this document: https://microchip.ua/simcom/2G/Application%20Notes/SIM800%20Series_SSL_Application%20Note_V1.05.pdf

Boss lady

8/23/2024

Issues with unstable or non-functional CAN bus communication on BeagleBone Black

Hello guys I am developing an industrial automation project using the BeagleBone Black (BBB) running Embedded Linux. The project involves communicating with multiple devices over the CAN bus. However, I encountered issues where the CAN bus communication is unstable or non-functional. I configured the CAN interface on the BeagleBone Black using the command ```bash sudo ip link set can0 up type can bitrate 500000 sudo ifconfig can0 up...

Dtynin

8/23/2024

How to ensure reliable wireless data transmission with RF module and SPI on AVR128DA48?

Hey guys, In my pressure monitoring project using the AVR128DA48 microcontroller, I’m trying to transmit the pressure readings wirelessly using an RF module via SPI. However, the transmission appears to be unreliable, with frequent data loss. so far I have checked the RF module configuration and ensured proper SPI communication, and also ensured the RF module is within the effective transmission range, yet data transmission remains unreliable, with some pressure readings not being transmitted successfully. What could be causing this unreliability, and how can I ensure consistent and reliable wireless data transmission? this is my written snippet: ``` #include <zephyr.h> #include <device.h>...

Solution:

Well, @Dtynin to address the problem, it's necessary to incorporate error checking and retries in order to guarantee reliable transmission. The likely cause of concern pertains to failure in verifying successful data communication by the RF module.

Boss lady

8/23/2024

How can I resolve persistent Wi-Fi connectivity issues with BeagleBone Black running Embedded Linux?

Hello guys, am developing an IoT project using the BeagleBone Black (BBB) running a custom Embedded Linux image. The project requires a stable Wi-Fi connection for real-time data transmission to a remote server. However, I am encountering persistent issues with the Wi-Fi connectivity. i am using connmanctl to configure and connect to a Wi-Fi network: ```bash...

wafa_ath

8/23/2024

Does anyone know what happened to face detection in esp32 cam?

Hello everyone. Does anyone know what happened to face detection in esp32 cam? I don't see the option in my browser as others have online. I read somewhere its been disabled? "Note: Releases 2.x.x of the ESP32 Hardware Libraries don't support face recognition on the ESP32 modules. The algorithm has been 'improved' and now runs too slowly on these processors." Source: https://github.com/robotzero1/esp32cam-access-control The photo after uploading the code...

Solution:

Hello @wafa_ath The face detection feature on your ESP32-CAM might be missing because the newer versions of the ESP32 hardware libraries I think from 2.1 and above have dropped support for face recognition on these modules. The face recognition algorithm was updated, but it now runs too slowly on the ESP32 processors, leading to its removal from these releases. You might need to downgrade to an older version of the ESP32 libraries or use alternative methods for face detection.

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DevHeads IoT Integration Server

The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.

DevHeads IoT Integration Server

The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.