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Add support for UDP broadcast and multicast for ESP32-S2 and ESP32-C3 #250

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Add support for UDP broadcast and multicast for ESP32-S2 and ESP32-C3 #250

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28 changes: 25 additions & 3 deletions usermods/audioreactive/audio_reactive.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1723,10 +1723,23 @@ class AudioReactive : public Usermod {
transmitData.FFT_Magnitude = my_magnitude;
transmitData.FFT_MajorPeak = FFT_MajorPeak;

#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32C3)
// ESP32-S2 and ESP32-C3: Use broadcast like the working Python script
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what is "the working python script" ?

//DEBUGSR_PRINTLN("ESP32-S2/C3: Sending UDP broadcast packet (like Python script)");
if (fftUdp.beginPacket(IPAddress(255, 255, 255, 255), audioSyncPort) != 0) {
fftUdp.write(reinterpret_cast<uint8_t *>(&transmitData), sizeof(transmitData));
int result = fftUdp.endPacket();
//DEBUGSR_PRINTF("UDP broadcast packet sent, result: %d\n", result);
}
#else
// Original ESP32 and other variants
//DEBUGSR_PRINTLN("ESP32: Sending multicast packet");
if (fftUdp.beginMulticastPacket() != 0) { // beginMulticastPacket returns 0 in case of error
fftUdp.write(reinterpret_cast<uint8_t *>(&transmitData), sizeof(transmitData));
fftUdp.endPacket();
int result = fftUdp.endPacket();
//DEBUGSR_PRINTF("Multicast packet sent, result: %d\n", result);
}
#endif

frameCounter++;
} // transmitAudioData()
Expand Down Expand Up @@ -2165,11 +2178,19 @@ class AudioReactive : public Usermod {
}

if ((audioSyncPort > 0) && (audioSyncEnabled > AUDIOSYNC_NONE)) {
#ifdef ARDUINO_ARCH_ESP32
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@softhack007 softhack007 Oct 21, 2025 •
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not necessary to remove this (see my other comment)

//DEBUGSR_PRINTF("Connecting UDP: port=%d, audioSyncEnabled=%d\n", audioSyncPort, audioSyncEnabled);
#if defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32C3)
// ESP32-S2 and ESP32-C3 may have issues with beginMulticast()
// Use regular UDP connection instead
//DEBUGSR_PRINTLN("ESP32-S2/C3: Using regular UDP begin");
udpSyncConnected = fftUdp.begin(audioSyncPort);
#elif defined(ARDUINO_ARCH_ESP32)
//DEBUGSR_PRINTLN("ESP32: Using multicast begin");
udpSyncConnected = fftUdp.beginMulticast(IPAddress(239, 0, 0, 1), audioSyncPort);
#else
udpSyncConnected = fftUdp.beginMulticast(WiFi.localIP(), IPAddress(239, 0, 0, 1), audioSyncPort);
#endif
//DEBUGSR_PRINTF("UDP connection result: %s\n", udpSyncConnected ? "SUCCESS" : "FAILED");
receivedFormat = 0;
if (udpSyncConnected) last_UDPTime = millis();
if (apActive && !(WLED_CONNECTED)) {
Expand Down Expand Up @@ -2395,13 +2416,14 @@ class AudioReactive : public Usermod {
}
#endif

#ifdef ARDUINO_ARCH_ESP32
#if defined(ARDUINO_ARCH_ESP32) || defined(CONFIG_IDF_TARGET_ESP32S2) || defined(CONFIG_IDF_TARGET_ESP32C3)
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this change is not necessary, because ARDUINO_ARCH_ESP32 is defined on all esp32 boads (not just on the classic esp32)

//UDP Microphone Sync - transmit mode
#if defined(WLEDMM_FASTPATH)
if ((audioSyncEnabled & AUDIOSYNC_SEND) && (haveNewFFTResult || (millis() - lastTime > 24))) { // fastpath: send data once results are ready, or each 25ms as fallback (max sampling time is 23ms)
#else
if ((audioSyncEnabled & AUDIOSYNC_SEND) && (millis() - lastTime > 20)) { // standard: send data each 20ms
#endif
//DEBUGSR_PRINTF("Calling transmitAudioData: audioSyncEnabled=%d, AUDIOSYNC_SEND=%d\n", audioSyncEnabled, AUDIOSYNC_SEND);
haveNewFFTResult = false; // reset notification
// Only run the transmit code IF we're in Transmit mode
transmitAudioData();
Expand Down