Survey 2: Meshtastic Handheld Display Terminal Questionnaire
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Fonts:
1. Try to minimize the number of different font types used
2. Minimize the generated font characters to only those you'll actually use - avoid unnecessarily generated characters. Use the Range and Symbols sections in the Font Manager.
https://docs.squareline.io/docs/dev_env/fontmanager#create-new-font

Images:
1. Try to minimize the number of images used
2. Avoid using images with alpha channels when possible
3. Where applicable, tile images that can be repeated. For example, instead of saving a divider line as a full image, save just a small section and adjust the widget size in the editor to determine the image size.
4. Try to use style effects rather than images wherever possible.

Memory Optimization:
1. Use the Temporary option in screen settings. When enabled, this loads the screen into memory only when it appears. It's recommended to enable this for all screens so only one screen loads into memory at a time, rather than the entire project.
https://docs.squareline.io/docs/widgets#screen

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https://www.elecrow.com/blog/calling-all-makers-and-developers-from-mfsz2025-join-us-for-an-exclusive-elecrow-company-tour.html

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Here is the serial log output when playing test1.mp3:
SD card initialized successfully. Now Playing: test1.mp3
Audio Info: MP3Decoder has been initialized, free Heap: 257352 bytes, free stack 5752 DWORDs
Audio Info: Content-Length: 372513
Audio Info: ID3 framesSize: 113
Audio Info: ID3 version: 2.4
Audio Info: ID3 normal frames
Audio Info: Audio-Length: 372400
Audio Info: stream ready

Here everything looks fine but I am not able to hear any audio from my speaker
Code I used:

include <Wire.h>

include <SPI.h>

include <SD.h>

include <FS.h>

include "Audio.h"

Audio audio;

define I2S_DOUT 20

define I2S_BCLK 35

define I2S_LRC 19

define SD_MOSI 11

define SD_MISO 13

define SD_SCK 12

define SD_CS 10

void setup() {
Serial.begin(9600);
while (!Serial);
pinMode(SD_CS, OUTPUT);
digitalWrite(SD_CS, HIGH);

SPI.begin(SD_SCK, SD_MISO, SD_MOSI);
SPI.setFrequency(1000000);

if (!SD.begin(SD_CS)) {
Serial.println("❌ SD card initialization failed!");
return; // Stop execution if SD card is not found
}
Serial.println("✅ SD card initialized successfully.");
audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
audio.setVolume(21); // Volume range: 0...21
Serial.println("🎵 Now Playing: test1.mp3");
audio.connecttoFS(SD, "/test1.mp3");
}
void loop() {
audio.loop(); // Necessary for continuous playback
}
void audio_info(const char *info) {
Serial.print("🔍 Audio Info: ");
Serial.println(info);
}
void audio_id3data(const char *info) {
Serial.print("📌 ID3 Metadata: ");
Serial.println(info);
}
void audio_eof_mp3(const char *info) {
Serial.println("✅ Song playback finished.");
}
void audio_showstation(const char *info) {
Serial.print("📡 Station: ");
Serial.println(info);
}
void audio_showstreamtitle(const char *info) {
Serial.print("🎶 Stream Title: ");
Serial.println(info);
}

My Questions
1. Are my I2S pin definitions compatible with the CrowPanel display?
2. Do I need any additional configuration for ESP32-audioI2S on CrowPanel?
3. Is there a way to verify if the I2S signal is actually being transmitted?
4. Any suggestions on debugging why no sound is output?

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