650 questions
1
vote
2
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156
views
Compile time type conversion problem with Arduino esp32 preferences.h
I'm trying to read an SSID using preferences.h but getting a compile time error which doesn't seem to make sense to me.
According to the Arduino docs, preferences.getString() can return either a char* ...
- 2,275
0
votes
0
answers
78
views
Xiao ESP32 Sense send camera picture over bluetooth
I want to connect my xiao esp32 sense board to my phone using my own app to get camera picture.
I tried bluetooth only, it work.
But if i add camera support i cannot see the board. I tested on "...
1
vote
1
answer
119
views
ESP32: no signal on the DAC output - for the Continuous Wave Output mode (Continuous/DMA Mode)
I want to generate two signals on the DAC outputs of ESP32, the sine and cosine ones. But I have no signal on the DAC outputs.
Please, do not offer answers for the Cosine Wave Output mode (Cosine Mode)...
- 561
0
votes
1
answer
95
views
ESP32 BLE Arduino: writeValue method of BLERemoteCharacteristic makes ESP hang
Using a ESP32 BLE connected to Arduino IDE, I'm now trying to Get Notification Attributes by sending command to Control Point of Apple Notification Center Service (ANCS). This is the code
static void ...
- 9,475
2
votes
0
answers
87
views
zero-ing PSRAM apparently consumes all memory
I'm struggling with an ESP32 library.
As premise, the ESP32 module I'm using has a 2 MB PSRAM on-board.
I wrote a test code to verify it's working:
void setup()
{
Serial.begin(115200);
while (!...
- 5,355
0
votes
0
answers
248
views
ESP32 (arduinoWebSockets) sending INMP441 audio as text but Node.js server interpreting messages as binary
I'm working on a project where I need to capture audio data from an INMP441 microphone on an ESP32, encode it as Base64, and send it over a WebSocket to a Node.js server for transcription using Google ...
1
vote
0
answers
297
views
SCL Stuck Low and I2C Timeout Issue with ESP32 and ZTW523A
I’m working on interfacing a ZTW523A touch controller with an ESP32 via I2C, but I’m facing issues with I2C timeouts (Wire.h error 5: timeout) and I am unable to detect the device using an I2C scanner....
- 11
0
votes
1
answer
64
views
Can I go from failing to connect, to scanning for ssids, without turning the wifi off and on again inbetween?
My objective is to turn on my microcontroller (esp32-devkit-v1) and have it reconnect to the last wifi it was connected to prior to being turned off.
If that SSID isn't in range, scan for new ones and ...
1
vote
1
answer
126
views
Sending data from local XAMPP php server to ESP32-S3-VROOM, returning => unable to connect [10061]
Apologies for the length of this thread.
Essentially, I've managed to set up an active connection between my ESP32 and a local XAMPP server. This server stores a captured image from the ESP32, which ...
0
votes
0
answers
132
views
Arduino ESP32C3 example project RMakerSwitch sketch too big
Hardware: ESP32-C3-DevKitM-1
IDE: Arduino IDE
OS: Windows 11
Issue: When I run ESP32C3 Dev Module example project RMakerSwitch and RMakerCustom, it shows the following error. It's an example code, why ...
- 19
0
votes
1
answer
483
views
ESP32 hardware serial port receives junk characters
I have two ESP32 boards connected back to back through a serial cable, using pin 16 for Rx and 17 for Tx. They exchange simple hello world messages through the serial2 hardware port on the ESP32. The ...
- 1,319
0
votes
2
answers
320
views
I got a crash in the BTC_TASK while migrating to ESP32-S3 from S1
We upgraded our custom PCB to ESP32-S3 and thus I am upgrading my firmware too.
Unfortunately, the BLE connecting to it, I got a crash in the BTC_TASK (See below for extended information)
By looking ...
- 13.7k
1
vote
0
answers
218
views
Using wifi causes SPI display to stop functioning on Xiao ESP32c3 with GC9A01 display
I'm trying to display graphics using tft_espi while doing wifi stuff, but it seems that turning on the wifi module causes display updates to cease working. I've tried rewriting the code using FreeRTOS ...
- 255
0
votes
0
answers
72
views
esp_deep_sleep doesn't work with large values
It is advertised/part of the defined parameter list that esp_deep_sleep takes in a uint64_t as a parameter, representing the amount of microseconds to sleep the ESP32, however I believe this is a bug. ...
- 9,569
0
votes
0
answers
79
views
No response when measuring different weights in my load cell+HX711+esp32
I am doing a project where I need to measure small differences in weight (like 0.01g differences).
Right now I am using this load cell (with 300g of max capacity), with this HX711 amplifier and this ...
0
votes
0
answers
88
views
Data order getting changed in I2C in ESP32 Arduino
I programmed an ESP32 as an I2C slave. I was using arduino IDE to program the ESP32 and the version installed in the boards manager is 2.0.17. When I tested it with a master, the data order was ...
- 588
0
votes
0
answers
157
views
Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled. Core 0 register dump: PC : 0x4003f3c8 PS :
After submitting the values in web server,the wifi will turn into OFF state.After that im getting this error.This error causes esp32 starts rebooting and starts running from beginning of program
Tried:...
1
vote
0
answers
459
views
ESP32-S3 Issue with LittleFS
I'm trying to build a sketch in Arduino IDE with LittleFS to work on my ESP32-S3. and got an error about corrupted LittleFS
My code:
#include <EEPROM.h>
#include <DNSServer.h>
#include <...
- 51
0
votes
0
answers
221
views
SIM7600 and ESP32-S3 can't get long HTTPS requests
I'm trying to make a module that both works with WiFi and SIM7600 module. The module receives a long (~300 KB) JSON file from an HTTPS server and saves it to flash memory. The function that works with ...
0
votes
1
answer
64
views
esp32 c++ pointer to object is lost? [duplicate]
I dont understand why this is not working... will try to explain the best I can:
in main I need an object of class Sim800Cls. Sim800Cls on the other hand, needs an object of class Prueba.
both ...
- 745
0
votes
1
answer
113
views
ESP32 class member variable not updating as expected in timer callback function
I have this code:
#include <Arduino.h>
#include "esp_timer.h"
//volatile int iCounter; <-- Uncommenting this line makes iCounter update in myTestFn()
class Test {
public: ...
0
votes
0
answers
97
views
ESP32: call `WiFi.begin` inside a constructor triggers the RTCWDT_RTC_RESET
I hope you are all doing great.
As the title says, I'm using an ESP32 and when I try to call the WiFi.begin method within a class's constructor, the ESP32 watchdog is triggered and reboots the device ...
- 136
1
vote
1
answer
796
views
ESP32-S3 delay before serial printing works
I need to see some feedback in my setup() code within Arduino framework, and am using a simple Serial.println(), but it never appears unless I add a delay. Sometimes even the Serial.println() in loop()...
- 63
1
vote
1
answer
510
views
ESP32 async scan networks returning fail even though successful scan. How do I detect a real fail
Environment ESP32-WROOM-32UE.
I need to run WiFi.scanNetworks() asynchronously for my project. My sample code returns a list of discovered networks however the output during WiFi.scanComplete() does ...
- 327
0
votes
1
answer
86
views
ESP32-CAM can't create access point WiFi
Probem: Esp32-cam don't create access point after flashing, and repeats attempt connection code, because can't execute command "WiFi.softAP("ESP");". Does anyone know how to solve ...
