ESP32 Forum

Hello,
I use an ESP32 Wroom 32 UE on my custom board. My board has to read an mp3 file on an SD card and play the audio on speaker. I control the board via BLE by sending the name of the file I want to play, stop, volume Up, volume down. This works perfectly. Now I would like to ad OTA to my board. The idea is to send a command via BLE that will turn of BLE and turn on WiFi and allow OTA.
The problem is that just adding the four Wifi libraries I need for this, makes my code crahs when I try to play audio. The only modification I made to the code is to add the libraries.

Libraries on my working code:

#include <ES8388.h>
#include <FS.h>
#include <SD_MMC.h>
#include <AudioGeneratorMP3.h>
#include <AudioFileSourceFS.h>
#include <AudioFileSourceID3.h>
#include <AudioOutputI2S.h>
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>

The libraries I add to use OTA:

#include <WiFi.h>
#include <ESPmDNS.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>

The error message:
ets Jul 29 2019 12:21:46

rst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1344
load:0x40078000,len:13964
load:0x40080400,len:3600
entry 0x400805f0
E (329) psram: PSRAM ID read error: 0xffffffff
INFO: Speaker is used as an output
SD_MMC Card Type: SDHC
SD_MMC Card Size: 7680MB
Listing directory: /
FILE: /1000.mp3
FILE: /2000.mp3
FILE: /3000.mp3
New value: 1000
BLE_message_received
change_musique to:1000
looking for: /1000.mp3,
Current File: /1000.mp3
Current File: /1000.mp3
found
Playing file: /1000.mp3
E (60486) I2S: i2s_alloc_dma_buffer(741): Error malloc dma buffer
E (60486) I2S: i2s_realloc_dma_buffer(788): Failed to allocate dma buffer
E (60487) I2S: i2s_set_clk(1729): I2S0 tx DMA buffer malloc failed
E (60493) I2S: i2s_driver_install(2027): I2S set clock failed
Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.


Core 1 register dump:
PC : 0x400e73bc PS : 0x00060030 A0 : 0x800d604e A1 : 0x3ffcb450
A2 : 0x00000000 A3 : 0x3ffcb48c A4 : 0x00000000 A5 : 0x00000019
A6 : 0x00000000 A7 : 0x3f415867 A8 : 0x800e735c A9 : 0x00000002
A10 : 0x00003fc3 A11 : 0x00000000 A12 : 0xffffffff A13 : 0x3ffc41b8
A14 : 0x00ff0000 A15 : 0xff000000 SAR : 0x0000001a EXCCAUSE: 0x0000001c
EXCVADDR: 0x0000003c LBEG : 0x40093ea1 LEND : 0x40093eb1 LCOUNT : 0xffffffff


Backtrace: 0x400e73b9:0x3ffcb450 0x400d604b:0x3ffcb480 0x400d615e:0x3ffcb4c0 0x400d616d:0x3ffcb510 0x400d58c6:0x3ffcb530 0x400d362a:0x3ffcb570 0x400d3749:0x3ffcb590 0x400e47f1:0x3ffcb5d0




ELF file SHA256: a96957f4ba36967f

Rebooting...

Does anyone have an idea why this could happen?

It is the first time I use a forum so I'm sorry if I made something wrong on my post. I know there are rules for posting code...

Thank you in advance for your help.

Most likely you are running out of memory. Those I2S errors indicate that you need a specific type of memory (DMA accessible) which is in short supply. You can decode the backtrace using the decoder, but that isn't going to fix the memory issues.
Using the NimBLE library will get you back some memory, but at the end of the day, the ESP32 is running on a tight memory budget, and it requires some careful management to get BLE and WiFi to coexist.