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Questions tagged [esp32]

A cheap and low-power microcontroller family using Tensilica Xtensa LX6 CPU cores with integrated WiFi and dual-mode bluetooth.

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Connect to wifi works only without password (Problem around WPA security)

I have an ESP32 Joy-it - SBC NodeMCU-ESP32 that should be use with board "ESP32 Dev Module". IDE says : Chip is ESP32-D0WDQ6 (revision v1.0). Website product: https://joy-it.net/en/products/...
Servuc's user avatar
  • 133
0 votes
1 answer
126 views

PubSubClient hanging on ESP32C3

I may have done some things incorrectly here, but this I what I have for publishing image that I read from serial camera to the MQTT broker: void capturePicture() { if (!cam.takePicture()) ...
greengold's user avatar
  • 111
1 vote
0 answers
139 views

ESP32 SPIFFS Write problem

I'm trying to flash a spiffs on a esp32 but it is not working, i'm using these commands from this source: to create the image: mkspiffs -c /data/ -b 4096 -p 256 -s 0x100000 spiffs.bin my output was ...
Danilo Namitala's user avatar
0 votes
1 answer
76 views

PubSubClient constructor parameter type mismatch

I am just learning an Arduino so this is totally educational purpose call. I want to instantiate PubSubClient client with WiFiClient parameter. #include <WiFiClient.h> #include <PubSubClient....
greengold's user avatar
  • 111
1 vote
0 answers
186 views

Pn532 doesnt detect sometimes

Im using ESP32 with PN532 NFC module with I2C And Im using this library https://github.com/elechouse/PN532 And using this documents https://www.elechouse.com/elechouse/images/product/PN532_module_V3/...
hobik's user avatar
  • 119
0 votes
0 answers
84 views

Configure CA to connect to server with Ethernet

I'm using Ethernet module ENC28J60 with ESP32 on Arduino IDE. I could establish a secure connection using WifiClientSecure.h here code #include <Arduino.h> #include <WiFi.h> #include <...
Just doin Gods work's user avatar
2 votes
2 answers
171 views

Can I use SPI-related pins as a Digital Output?

I am trying to use an esp32 (NodeMCU-32s) as a ringlight controller for my camera. All it should do is sense when an input pin goes low (the camera's output connects to ground when the shutter goes ...
Zach's user avatar
  • 21
-1 votes
1 answer
206 views

ESP32 cannot serial monitor [closed]

I use esp32 devkit v1 . I code follwing this picture. const int vavle = 1; int d = 1; void setup() { Serial.begin(115200); delay(2000); while (!Serial); Serial.println(); pinMode(vavle,...
poom's user avatar
  • 11
0 votes
1 answer
296 views

Triggering a picture with esp32-cam and GPIO13

I'm trying to trigger a picture using the GPIO13 of an esp32-cam, AI Thinker model. I'm using that example as a base: https://randomnerdtutorials.com/esp32-cam-pir-motion-detector-photo-capture/ but ...
brunobhr's user avatar
0 votes
0 answers
33 views

ESP32 thingboard broker mqtt error

Hello so i have this code, but it gives me this error , i have no idea why is not connection to broker mqtt? on the dash board say is active "Conectando ao broker MQTT...Falha na conexao ao ...
Catalin Stefan's user avatar
0 votes
2 answers
2k views

How to use an external 32kHz crystal for ESP32 S3 with Arduino IDE?

I want to use an external 32kHz crystal for RTC with ESP32 S3, but I didn't see any example or tutorial for Arduino IDE, Even when I asked ChatGPT, it gave me some example but the code gave library ...
mehmet's user avatar
  • 287
2 votes
1 answer
2k views

Impossible to install the esp_camera library

I cannot install the esp_camera library. When I try to add the .zip, I get "does not contain a valid library. Everything about this ESP-32 Cam seems to rely on that library, and I can't find a ...
brunobhr's user avatar
0 votes
0 answers
95 views

ESP32 Camera driver VSYNC query

We are new to ESP32 and Camera. We are facing issue in getting VSYNC event. We observed that if we change fb_count (frame buffer count) value the VSYNC behavior is changing. Our understanding is, ...
Abhay Kondru's user avatar
0 votes
0 answers
342 views

Connecting Multi MPU6050 using I2C on ESP32 Wroom 32D

I want to connect two MPU6050 sensor on Esp32 using the I2C protocol. ESP32 to MPU6050 connection, I'm using - VCC(ESP32) - VCC(MPU6050_1) - VCC(MPU6050_2) GND(ESP32) - GND(MPU6050_1) -...
Sourabh Tiwari's user avatar
2 votes
1 answer
164 views

Sparkfun ISL29125 breakout board issue with Arduino IDE with ESP32

I am working on a project where I need to get the RGB light value from surrounding ambient light. For that I am using an ESP32 with a Sparkfun ISL29125 breakout board. I have tried to scan available/...
Nikunj Vadher's user avatar
1 vote
0 answers
621 views

Keyestudio KS5009 ESP32WROOM32 Smart Home

I'm encountering persistent errors with the sample code provided for my smart home kit project. Despite conducting extensive research and troubleshooting efforts, I haven't been able to find a ...
Mars's user avatar
  • 39
0 votes
1 answer
821 views

(Why is) getLocalTime() on ESP32 taking several seconds to complete successfully

This is a cross-post from https://github.com/espressif/arduino-esp32/discussions/8653 as it didn't yield any results there. I noticed that getLocalTime() is consistently taking 5-10+ seconds to ...
Marcel Stör's user avatar
0 votes
1 answer
111 views

ESP-IDF logging library slows down ISR processing

I'm hacking a project with ESP32-WROOM module. I'm running some timers with alarms along with some peripherals triggering ISRs. In the ISR routine I'm sending events to a queue, and receiving them in ...
ak.'s user avatar
  • 103
0 votes
1 answer
4k views

The port is not recognized when working with esp32 in arduino ide 2.2.1 (windows 11 home edition)

I'm trying to program the ESP32 board with Arduino IDE. But The port it's not recogniized when working with esp32 in arduino ide 2.2.1. After some research I found that the port is not recognized by ...
Jose Marques's user avatar
2 votes
1 answer
742 views

Is it possible to use UART0 freely when connecting ESP32 s3 via USB (D+, D-)?

I've designed a test PCB that utilizes an ESP32 S3 and testing pins. During program uploads, I use the USB interface over GPIO20 and GPIO19 as D+ and D-. Everything works fine in this configuration. ...
mehmet's user avatar
  • 287
2 votes
1 answer
169 views

Limit of EthernetClient connections

I'm working on a project on which I need to have multiple EthernetClient connections to different servers. All of these connections must be kept alive simultaneously and by this I mean I cannot stop ...
Mazaetos's user avatar
1 vote
2 answers
583 views

Why Arduino IDE is brignging wrong board name for ESP32 S3

I am designing a pcb for ESP32 S3 wroom-1 for testing pins which are safe to use. My PCB look like this: I program ESP32 S3 via USB interface gpio19 "D-" gpio20 "D+". When I plug ...
mehmet's user avatar
  • 287
0 votes
1 answer
268 views

ESP32 TTGO T-Call connect to SX1276

I have an ESP32 TTGO T-Call and I want to add a LoRa SX1276. I am new to that and I am trying to write a simple program that, when it receives a packet from a LoRa sender, sends via gsm an HTTP ...
kostas ch.'s user avatar
-1 votes
1 answer
671 views

AccelStepper.h - How can I quickly increase the speed of a NEMA 17 motor?

I'm pretty new to Arduino. I am trying to build a self-balancing robot. I am using A4988 drivers, an ESP32 microcontroller, NEMA 17 motors, and a 6050 MPU. The problem is that, although the speed ...
camu's user avatar
  • 1
0 votes
1 answer
581 views

ESP32 struggling to trigger relay module consistently

I'm working with a 4-channel, 5 V relay module and an ESP32 which operates on 3.3 V. The setup seemed to work well initially but I have started experiencing some inconsistencies. One of the four ...
Hach Rbh's user avatar
1 vote
0 answers
152 views

dht11 data on ESP32 NTP clock (updated)

I'm trying to get my ESP32 internet clock to show temperature and humidity data from a dht11 sensor on a MAX7219 display but my code seems to have some issues. After verifying the code there are no ...
Drew's user avatar
  • 11
1 vote
0 answers
333 views

What can be the reason for a Stack canary watchpoint triggered (loopTask) on a https get() command?

I have a program that only do get and post to a controller via an ethernet port. My problem is that after a certain amount of loop in the program, i got this error: Guru Meditation Error: Core 1 ...
Martin Chicoine's user avatar
0 votes
1 answer
592 views

Control esp32 via keyboard keys

I'm making a project in which I have to control a mini car and get sensor information via bluetooth. I'd like to be able to control the mini car with the computers keyboard (w,a,s,d), but I was not ...
Matrodsilver's user avatar
2 votes
0 answers
538 views

text section exceeds available space in board for esp32 + bluetooth + wifi + httpclient

I trying to learn how to write arduino code for an ESP32 WROOM 32. I want my esp32 to make an http request to a RESTFUL API i've set up. Thus, my esp32 will need wifi access. I was planning to use ...
learningtech's user avatar
2 votes
1 answer
367 views

communicating esp 32 with arduino uno

I made a spider robot using arduino and from esp. I made an audio output device which is linked to python program which writes a particular data (when we speak a command) to esp board and accordingly ...
Akshit Singh's user avatar
2 votes
0 answers
237 views

Uploading code to ESP32 using Arduino OTA

im trying to upload my code to my esp32 through OTA iam able to discover the network port but my code is always failing to upload i donno the reason behind it #include <WiFi.h> #include <...
Abhay Kondru's user avatar
0 votes
2 answers
576 views

Unable to control motor with ESP32 using logic level shifter

I am using an ESP32 a TB6600 micro stepper, and a Nema 23 stepper motor, I am trying to control the motor with the esp32 but the TB6600 requires a 5v signal, I tried to fix this by using a logic level ...
warherolion's user avatar
1 vote
0 answers
134 views

`time()` doesn't reset to 0 when calling `ESP.restart();` on ESP32?

I'm using an ESP32 and it's fine, I have no issues at all. I was just curious that after flashing a new firmware via OTA, like this: #include <ESPAsyncWebSrv.h> #include <Update.h> void ...
Gizmo's user avatar
  • 111
0 votes
2 answers
870 views

SD Card Mount Failed with Waveshare ESP32 using Arduino IDE

I'm currently working on a project using an ESP32 (the Waveshare ESP32 Driver Board), and I am trying to read data from an SD card, but consistently getting a "SD Card Mount Failed" error. I ...
Mike Buss's user avatar
2 votes
0 answers
83 views

Slow I2C communication

To collect temperature and BPM, I connected a max30101 in my Heltec WiFi kit V3 with ESP32. The data collected are stored in arrays to extract statistical features from signals which an algorithm will ...
Alice's user avatar
  • 31
1 vote
0 answers
218 views

ESP32 Shows Incorrect Input Voltage From Analog Pin

I have an esp32 WROOM-32 connected to a MQ9 gas sensor to GPIO35. Both are powered separately. measuring the output from the sensor directly using a multi-meter shows a constant reading of 0.145 V but ...
Kabilaash RB's user avatar
1 vote
0 answers
145 views

ESP32 - resetting BT(classic)-Discovery variables ends in memory chaos

I want to search for bt devices in each loop(), store them and query them one by one. This works fine so far. However, when I try to reset the corresponding variables, I get the following error: "...
Ted Mosby's user avatar
1 vote
0 answers
243 views

How to use multiple PN532 over i2c bus(es) and SPI?

I am working on a project that involves 3 PN532_modules to an ESP32, which sends the Tag_ID over BLE. Plan A was to use One module on i2c_1, second on I2C_2 and third over SPI. The SPI one works as ...
user91535's user avatar
0 votes
1 answer
13k views

RX and TX pins on esp32

hello guys i'm new to this field i really need your help i want to wire a GSM module (SIM808) to a ESP32 board using the TX and RX pins so the pins are labeled RX and TX no pin number like the others ...
Hach Rbh's user avatar
1 vote
0 answers
35 views

DEVKIT V1 DOIT 30 pinout board could not read analog value when using wifi library [duplicate]

I am using DEVKIT V1 DOIT board and 30 pinout board. When I upload this code for checking analog value from serial monitor: // Define the analog input pin for the IR sensor const int analogPin = ...
Asif Uz Zaman's user avatar
1 vote
0 answers
149 views

ESP32 trouble with running ledcWrite inside of ISR

ESP32-S2 (Wemos/Lolin S2 mini) Arduino 2.1.1 on Windows 11 Hello, Thank you for taking the time to read this post and for any assistance you can provide. I consider myself a newbie when it comes to ...
Michael.G's user avatar
3 votes
1 answer
2k views

MD5 of File doesnot match data in flash Error with ESP32 S3

I am getting the fatal error MD5 of file not match data in flash. Below is the output of upload. [1/5] cmd.exe /C "cd /D D:\Users\INOMETRICS\espressif\workspace\blink\build\esp-idf\esptool_py &...
NINJA's user avatar
  • 51
1 vote
0 answers
515 views

Functions downgraded in the I2S library using an ESP32

I am following the instruction to setup a microphone with an esp32 with arduino cli. Here is the tutorial https://dronebotworkshop.com/esp32-i2s/#Resources https://www.youtube.com/watch?v=m-MPBjScNRk&...
ecjb's user avatar
  • 165
1 vote
1 answer
857 views

ArduinoHTTPClient POST multipart/form-data from SD card returning 400 Bad Request

I have been having trouble trying to send a small txt file to my server using the following function with TinyGSM. I know I am connected to the internet and reaching the web server, however, I keep ...
NRav's user avatar
  • 225
1 vote
1 answer
191 views

How to optimize checking for specific string in a UART stream

I want to check for specific string (like "RecordStart") in a UART stream (115 200 baud 8N1) from a camera, to know when it is recording or not/if there is an SD. I am using an ESP32-WROOM-...
AyubowanPro's user avatar
1 vote
0 answers
252 views

Fast wired communication protocols

I have an esp32 connected to an FPGA about 2 cm on a PCB. I am trying to send a constant data stream to the FPGA at a throughput of around 1.5 MB/s. This is too fast for UART, I've been considering ...
Orbitronics's user avatar
1 vote
1 answer
3k views

Arduino uno R4 vs ESP32 Dev board

I was wondering what product would work best for my application. I need a web server interface to control several digital outputs connected to my board, and it needs to be as polished as it can be. In ...
Francesco Antonio Miccoli's user avatar
5 votes
0 answers
588 views

Internet in ESP32 is not working with IPv6

I am using ESP-WROOM-32D in STA mode with Arduino IDE(2.0.5) ESP32 board(2.0.9). I am trying to do http post request with ESP32. Router that provides internet supports only IPv6. Here I am getting ...
dharmikP's user avatar
  • 151
3 votes
1 answer
169 views

How do I set the DHCP pool for an ESP-WIFI-MESH? [closed]

I'm building a mesh with ESP32 dev kits (ESP32-DevKitC V4) using the ESP-IDF VS Code extension and the ip_internal_network example project. The code for the example, common project components, and the ...
diomed's user avatar
  • 51
2 votes
0 answers
684 views

Receive data from ESP32 with HTTPClient

I need to receive data from sensors on the websites located on my PC (hosted with XAMPP). When I was first using AsyncWebServer library and hosting them on ESP32 everything was working with a ...
CaramelTr's user avatar

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