diff --git a/.vscode/arduino.json b/.vscode/arduino.json
index 3d8ebd7..dbd298b 100644
--- a/.vscode/arduino.json
+++ b/.vscode/arduino.json
@@ -1,5 +1,5 @@
 {
-    "board": "STMicroelectronics:stm32:GenF4",
+    "board": "STMicroelectronics:stm32:GenG4",
     "port": "COM17",
     "prebuild": "if exist bin rd /s /q bin"
 }
\ No newline at end of file
diff --git a/IR_DecoderRaw.h b/IR_DecoderRaw.h
index e634e23..08374a4 100644
--- a/IR_DecoderRaw.h
+++ b/IR_DecoderRaw.h
@@ -187,8 +187,8 @@ bool isReciveRaw;
 
     ////////////////////////////////////////////////////////////////////////
     bool isData = true;                  // Флаг относится ли бит к данным, или битам синхронизации
-    uint16_t i_dataBuffer;               // Счётчик буфера данных
-    uint8_t nextControlBit = bitPerByte; // Метка для смены флага isData
+    uint16_t i_dataBuffer;                // Счётчик буфера данных
+    uint16_t nextControlBit = bitPerByte; // Метка для смены флага isData; uint16_t нужен для длинных кадров (>24 байт total)
     uint8_t i_syncBit;                   // Счётчик битов синхронизации
     uint8_t err_syncBit;                 // Счётчик ошибок синхронизации
 
diff --git a/test_examples/longData/longData.ino b/test_examples/longData/longData.ino
new file mode 100644
index 0000000..370e3c3
--- /dev/null
+++ b/test_examples/longData/longData.ino
@@ -0,0 +1,150 @@
+/*
+ * Тест длинной полезной нагрузки IR (0x5E + строка, как ответ версии в Car).
+ * Передача через DMA + TIM17 — как в машинке (Car/src/IR/IR.cpp, BoardTest/IR_DMA).
+ * Авто-режим: чередование total длины кадра 24/25 байт.
+ */
+#include "IR_Decoder.h"
+#include "IR_Encoder.h"
+#include "TimerStatic.h"
+
+/** 1 — TX через DMA (STM32G4). */
+#ifndef LONGDATA_USE_DMA
+#define LONGDATA_USE_DMA 0
+#endif
+
+#if LONGDATA_USE_DMA
+#include <IrDmaTxStm32.h>
+#endif
+
+static constexpr uint16_t kIrDeviceAddr = 0;
+static constexpr uint8_t kCmdVersion = 0x5E;
+static constexpr uint32_t kSerialBaud = 115200;
+static constexpr uint32_t kSendPeriodMs = 500;
+static constexpr uint8_t kMaxPayload = bytePerPack;
+static constexpr uint8_t kMaxParamBytes = kMaxPayload - 1;
+
+static IR_Encoder enc(PIN_IR_ENC_FORWARD, kIrDeviceAddr, nullptr);
+static HardwareTimer irTimer(TIM17);
+
+#if LONGDATA_USE_DMA
+namespace {
+constexpr size_t kIrDmaStreams = 1;
+constexpr uint16_t kIrDmaTxWordCount = 4096U;
+constexpr size_t kIrDmaTxMaxGateRuns = 1024U;
+static uint32_t s_irDmaWords[kIrDmaTxWordCount];
+static IR_Encoder::IR_TxGateRun s_irGateRuns[kIrDmaTxMaxGateRuns];
+} // namespace
+
+static IrDmaTxStm32<kIrDmaStreams> dmaBackend;
+static bool txBusy(void * /*ctx*/) { return dmaBackend.busy(); }
+static bool txStart(void * /*ctx*/, IR_Encoder *e, const uint8_t *packet, uint8_t len) {
+    return dmaBackend.start(e, packet, len);
+}
+#endif
+
+static char s_paramAscii[kMaxParamBytes + 1];
+static uint8_t s_irPayload[kMaxPayload];
+static uint8_t s_irPayloadLen = 0;
+static uint32_t s_lastSendMs = 0;
+static bool s_sendLongerFrame = false;
+
+// 24 байта total: msg(1)+addr(2)+addr(2)+data(17)+crc(2), где data=0x5E + 16 ASCII.
+static const char kPayload16[] = "Car_v4.3.9_[12MH";
+// 25 байт total: как выше, но data=0x5E + 17 ASCII.
+static const char kPayload17[] = "Car_v4.3.9_[12MHz]_G491";
+
+static void rebuildIrPayload() {
+    s_irPayload[0] = kCmdVersion;
+    size_t n = 0;
+    while (n < sizeof(s_paramAscii) && s_paramAscii[n]) {
+        ++n;
+    }
+    const size_t copyLen = (n > kMaxParamBytes) ? kMaxParamBytes : n;
+    memcpy(s_irPayload + 1, s_paramAscii, copyLen);
+    s_irPayloadLen = static_cast<uint8_t>(1 + copyLen);
+}
+
+static void setAlternatingPayload() {
+    const char* src = s_sendLongerFrame ? kPayload17 : kPayload16;
+    strncpy(s_paramAscii, src, kMaxParamBytes);
+    s_paramAscii[kMaxParamBytes] = '\0';
+    s_sendLongerFrame = !s_sendLongerFrame;
+}
+
+static void sendVersionPacket() {
+    rebuildIrPayload();
+    const IR_SendResult r = enc.sendData(IR_Broadcast, s_irPayload, s_irPayloadLen);
+    Serial.print(F("TX 0x5E + "));
+    Serial.print((unsigned)(s_irPayloadLen - 1));
+    Serial.print(F(" B, ok="));
+    Serial.print(r.success ? F("1") : F("0"));
+    Serial.print(F(", t="));
+    Serial.print(r.sendTimeMs);
+    Serial.println(F(" ms"));
+}
+
+void setup() {
+    Serial.begin(kSerialBaud);
+
+    strncpy(s_paramAscii, kPayload16, kMaxParamBytes);
+    s_paramAscii[kMaxParamBytes] = '\0';
+    rebuildIrPayload();
+
+    #if LONGDATA_USE_DMA
+    IR_Encoder::beginClockOnly(&irTimer);
+
+    IrDmaTxStm32<kIrDmaStreams>::Config cfg;
+    cfg.timer = &irTimer;
+    cfg.streamCount = kIrDmaStreams;
+    cfg.streams[0].instance = DMA1_Channel1;
+    cfg.streams[0].irq = DMA1_Channel1_IRQn;
+    cfg.streams[0].dmamuxRequest = DMA_REQUEST_TIM17_UP;
+    cfg.streams[0].enc = &enc;
+    cfg.streams[0].dmaWords = s_irDmaWords;
+    cfg.streams[0].dmaWordCount = kIrDmaTxWordCount;
+    cfg.streams[0].gateRuns = s_irGateRuns;
+    cfg.streams[0].maxGateRuns = kIrDmaTxMaxGateRuns;
+
+    if (!dmaBackend.begin(cfg)) {
+        Serial.println(F("[IR_DMA] init FAILED"));
+        return;
+    }
+    IR_Encoder::setExternalTxBackend(txStart, txBusy, nullptr);
+    #elif LONGDATA_LEGACY_ISR
+    IR_Encoder::begin(&irTimer, 1, TIM17_IRQn, 0);
+    #else
+    IR_Encoder::begin(&irTimer, 1, TIM17_IRQn, 0);
+    #endif
+    enc.enable();
+
+    #if LONGDATA_USE_DMA
+    Serial.println(F("longData: DMA TX alternating 24/25 bytes"));
+    #elif LONGDATA_LEGACY_ISR
+    Serial.println(F("longData: legacy ISR TX (pre-unified FSM) 24/25 bytes"));
+    #else
+    Serial.println(F("longData: ISR TX (unified FSM) alternating 24/25 bytes"));
+    #endif
+    Serial.print(F("Auto-period ms = "));
+    Serial.println((unsigned long)kSendPeriodMs);
+}
+
+void loop() {
+    #if LONGDATA_USE_DMA
+    IR_Encoder::tick();
+    #endif
+
+    const uint32_t now = millis();
+    if (now - s_lastSendMs >= kSendPeriodMs) {
+        s_lastSendMs = now;
+        setAlternatingPayload();
+        sendVersionPacket();
+    }
+}
+
+#if LONGDATA_USE_DMA && defined(STM32G4xx)
+extern "C" void DMA1_Channel1_IRQHandler(void) {
+    if (auto *p = IrDmaTxStm32<kIrDmaStreams>::instance()) {
+        p->irqForStream(0);
+    }
+}
+#endif