Questions tagged [esp32]
A cheap and low-power microcontroller family using Tensilica Xtensa LX6 CPU cores with integrated WiFi and dual-mode bluetooth.
938 questions
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ESP32C6 + PN532 NFC Reader (HW-147C) SPI Communication Not Working - "Didn't find PN53x board"
I'm trying to get an NFC reader (PN532 module, HW-147C model) working with my ESP32C6 using SPI. I tried using multiple libraries (seeed-studio, Adafruit, and some on github, but nothing worked).
This ...
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Missing data when communicating over UART
So I am working on an Arduino project and have trouble communicating over UART.
I have a SIM7600G-H 4G Module from Waveshare and hooked it up to an Arduino Nano ESP32. The connections are as follows:
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Is there a c++ library for the GitHub API and Arduino compatible?
I'm logging some data using an ESP32 board, and I need the data logged to be uploaded from the ESP32 to one of my repositories on GitHub.
Are there any C++ libraries for the GitHub API compatible with ...
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ESP32-S3 continuous reboot after flashing larger firmware
I’m facing a persistent reboot issue on one of my ESP32-S3 boards after flashing a larger firmware binary. Here’s a breakdown of the problem:
🔧 What’s Happening
After flashing my project (which ...
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How does a sensor data move from physical layer to application layer
I have used Arduino IDE to program a IOT gateway using ESP32 and W5500 ethernet module to use them as a ethernet webserver.
I wanted to know for educational purpose, I know that sensor belong to ...
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How to receive data from an Rasberry Pi on ESP32-Cam?
My use case is an ESP32-cam that serves two purposes:
HTTP feed (accessed by a Raspberry Pi 5 which processes stream and provides a response)
Servo Motor microcontroller: Receives response from ...
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Timer's interrupt is not working in ESP32S2 board
C:\Users\Admin\AppData\Local\Temp\.arduinoIDE-unsaved2024610-7740-sfbutd.e9d77\sketch_jul10a\sketch_jul10a.ino: In function 'void setup()':
C:\Users\Admin\AppData\Local\Temp\.arduinoIDE-unsaved2024610-...
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ESP32-S3 Does not read BME680 Data
I build a PCB using ESP32-S3-WROOM-1-N16R2 Controller. I programmed a BME680 sensor with this MCU. My pinouts are,
BME_SCK 38
BME_MISO 19
BME_MOSI 15
BME_CS 5
This is my Arduino code,
#include <...
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ESP32 scanNetworks compile error: call of overloaded 'BSSID(int)' is ambiguous
I am trying to run following code:
#include <WiFi.h>
void setup() {
//int16_t scanNetworks(bool async = false, bool show_hidden = false, bool passive = false, uint32_t max_ms_per_chan = 300,...
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Connect ESP32-CAM to L293D
Disclaimer: I'm a programmer, not an electronics expert. I built this car using an Arduino Uno, and now I want to add a camera to it. I’ve tried researching online, but I couldn’t find much ...
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How can you trace out the short-term trajectory of a 6DOF IMU
I've looked and looked on forums, wrote prompt after prompt in DeepSeek and ChatGPT but I've hit a roadblock.
I'm currently working on a project where I want to write numbers in the air using a ...
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Can't get ESP32C6 to work in PlatformIO. Error is "unsupported ISA substring '_zicsr_zifencei'"
I bought a few Waveshare ESP32C6 Touch LCD 1.47 boards and have had a hell of a time trying to get my sketch uploaded. I somewhat understand that PIO doesn't support esp32c6 because:
The ESP32 Core ...
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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 ...
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Using WiFiServer in blocking mode
I am learning ESP32 network programming and I started by writing a simple telnet server. It uses a WiFiServer object to listen on port 23 and just log anything it receives to the serial monitor.
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Accessing invalid key in ArduinoJson causes ESP32 to reboot [closed]
I am running a project where I have multiple ESP32s communicate over WebSockets and I am using the Arduino IDE 2.3.4 for it. The communication primarily uses JSON and sends it as strings. To work with ...
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More flash memory with SD card
I am pretty sure that everyone have seen the low flash memory error, the same I have got while making my raycaster. So, I was thinking that is there any way to increase the flash memory of ESP32 with ...
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Motors whining and never spinning with L298N
I have a problem involving my ESP32, a L298n module, two whining motors and a 9V battery.
I've connected the battery positive 12 VDC to VCC, and the negative to GND.
Two 9V motors are connected to ...
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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 ...
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Getting a WDT reset on ESP32
I have a project that uses a GY-53 BMP180 and ESP32.
Each time I connect ESP32 to USB after uploading, I get this error:
22:27:27.352 -> rst:0x8 (TG1WDT_SYS_RESET),boot:0x13 (...
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ESP32 Upload Fails: “Failed to connect to ESP32: No serial data received” (Worked Previously)
I’m trying to upload code to my ESP32 board using the Arduino IDE, but I’m consistently getting the following error:
A fatal error occurred: Failed to connect to ESP32: No serial data received.
For ...
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ESP32 TFT_eSPI 8-bit Parallel Compile Error
I am compiling TFT_eSPI library for Arduino ESP32 in 8 bit parallel mode, When I Compile it in SPI mode then no error occurs, but when I select 8-bit parallel mode in User Setup File, then it shows ...
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P10 LED Display Character Overlaying with DMD library
Hi, I am using p10 Led display and trying to make digital clock. it works fine but after 2 or more weeks later without any switch off there is a overlaying start on characters. why this happening I ...
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74HC595 chip with 7 segment display constantly displays either all 1's or all 0's
I made a simple circuit with an Arduino Nano ESP32, where I have connected a 74HC595 8-bit shift register chip, as well as a 7 segment display with a 100 ohm resistor on common (cathode) to show the ...
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How to change partition scheme with arduino-cli?
I'm using arduino-cli to program an ESP32-S2. If I compile my sketch using the default partition scheme
> arduino-cli compile -b esp32:esp32:esp32s2 sketch
a lot of space is allocated for SPIFFS ...
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Why does Serial.write() work but Serial.print() doesn't?
I am testing my GPS module with an ESP32 using the Arduino IDE. I'm asking because I usually don't fully understand the difference between Serial.write() and Serial.print().
This code is working ...
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