diff --git a/main.go b/main.go
index 16bf5f9..2daf295 100644
--- a/main.go
+++ b/main.go
@@ -26,7 +26,7 @@ func main() {
 	port := flag.String("port", "", "Serial port (e.g. /dev/ttyUSB0, COM3)")
 	baud := flag.Int("baud", 460800, "Flash baud rate")
 	offset := flag.String("offset", "0x0", "Flash offset for single binary mode")
-	chip := flag.String("chip", "auto", "Chip type: auto, esp8266, esp32, esp32s2, esp32s3, esp32c2, esp32c3, esp32c5, esp32c6, esp32h2")
+	chip := flag.String("chip", "auto", "Chip type: auto, esp8266, esp32, esp32s2, esp32s3, esp32c2, esp32c3, esp32c5, esp32c6, esp32h2, esp32p4-rev1")
 	noCompress := flag.Bool("no-compress", false, "Disable compression")
 	eraseAll := flag.Bool("erase-all", false, "Erase entire flash before writing")
 	flashMode := flag.String("fm", "keep", "Flash mode: keep, qio, qout, dio, dout")
@@ -232,6 +232,8 @@ func parseChipType(s string) espflasher.ChipType {
 		return espflasher.ChipESP32C6
 	case "esp32h2", "esp32-h2":
 		return espflasher.ChipESP32H2
+	case "esp32p4-rev1", "esp32-p4-rev1":
+		return espflasher.ChipESP32P4Rev1
 	default:
 		log.Fatalf("Unknown chip type: %s", s)
 		return espflasher.ChipAuto
diff --git a/pkg/espflasher/chip.go b/pkg/espflasher/chip.go
index e62eccf..37b809b 100644
--- a/pkg/espflasher/chip.go
+++ b/pkg/espflasher/chip.go
@@ -15,6 +15,7 @@ const (
 	ChipESP32C5
 	ChipESP32C6
 	ChipESP32H2
+	ChipESP32P4Rev1
 	ChipAuto // Auto-detect chip type
 )
 
@@ -39,6 +40,8 @@ func (c ChipType) String() string {
 		return "ESP32-C6"
 	case ChipESP32H2:
 		return "ESP32-H2"
+	case ChipESP32P4Rev1:
+		return "ESP32-P4-Rev1"
 	case ChipAuto:
 		return "Auto"
 	default:
@@ -130,15 +133,16 @@ const chipDetectMagicRegAddr uint32 = 0x40001000
 
 // All known chip definitions.
 var chipDefs = map[ChipType]*chipDef{
-	ChipESP8266: defESP8266,
-	ChipESP32:   defESP32,
-	ChipESP32S2: defESP32S2,
-	ChipESP32S3: defESP32S3,
-	ChipESP32C2: defESP32C2,
-	ChipESP32C3: defESP32C3,
-	ChipESP32C5: defESP32C5,
-	ChipESP32C6: defESP32C6,
-	ChipESP32H2: defESP32H2,
+	ChipESP8266:     defESP8266,
+	ChipESP32:       defESP32,
+	ChipESP32S2:     defESP32S2,
+	ChipESP32S3:     defESP32S3,
+	ChipESP32C2:     defESP32C2,
+	ChipESP32C3:     defESP32C3,
+	ChipESP32C5:     defESP32C5,
+	ChipESP32C6:     defESP32C6,
+	ChipESP32H2:     defESP32H2,
+	ChipESP32P4Rev1: defESP32P4Rev1,
 }
 
 // detectChipByMagic returns the chip definition matching the given magic value,
diff --git a/pkg/espflasher/doc.go b/pkg/espflasher/doc.go
index e9893ec..d5e03b0 100644
--- a/pkg/espflasher/doc.go
+++ b/pkg/espflasher/doc.go
@@ -12,6 +12,7 @@
 //   - ESP32-C5
 //   - ESP32-C6
 //   - ESP32-H2
+//   - ESP32-P4 (rev 1 / ECO2)
 //
 // # Quick Start
 //
diff --git a/pkg/espflasher/stub.go b/pkg/espflasher/stub.go
index d8f0901..270225b 100644
--- a/pkg/espflasher/stub.go
+++ b/pkg/espflasher/stub.go
@@ -13,15 +13,16 @@ var stubFS embed.FS
 
 // chipStubName maps each supported chip type to its stub JSON filename stem.
 var chipStubName = map[ChipType]string{
-	ChipESP8266: "esp8266",
-	ChipESP32:   "esp32",
-	ChipESP32S2: "esp32s2",
-	ChipESP32S3: "esp32s3",
-	ChipESP32C2: "esp32c2",
-	ChipESP32C3: "esp32c3",
-	ChipESP32C5: "esp32c5",
-	ChipESP32C6: "esp32c6",
-	ChipESP32H2: "esp32h2",
+	ChipESP8266:     "esp8266",
+	ChipESP32:       "esp32",
+	ChipESP32S2:     "esp32s2",
+	ChipESP32S3:     "esp32s3",
+	ChipESP32C2:     "esp32c2",
+	ChipESP32C3:     "esp32c3",
+	ChipESP32C5:     "esp32c5",
+	ChipESP32C6:     "esp32c6",
+	ChipESP32H2:     "esp32h2",
+	ChipESP32P4Rev1: "esp32p4-rev1",
 }
 
 // stubJSON mirrors the JSON structure of the esptool stub flasher files.
diff --git a/pkg/espflasher/stubs/esp32p4-rev1.json b/pkg/espflasher/stubs/esp32p4-rev1.json
new file mode 100644
index 0000000..ef5e338
--- /dev/null
+++ b/pkg/espflasher/stubs/esp32p4-rev1.json
@@ -0,0 +1,8 @@
+{
+    "entry": 1341194240,
+    "text": "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",
+    "text_start": 1341194240,
+    "data": "ChLxT0yC9U+QA/FPkAPxT5AD8U+QA/FPkAPxT5AD8U+QA/FPkAPxT5AD8U+QA/FPkAPxT5AD8U+QA/FPkAPxT5AD8U+QA/FPkAPxT5AD8U+QA/FPkAPxT5AD8U+QA/FPkAPxT5AD8U+QA/FPkAPxT5AD8U+iCvFPrgrxT/oK8U8mC/FPsAvxT1oL8U+ECvFP8gvxT24M8U+UDPFPRArxT4IM8U9ECvFP+gzxTwoN8U8ODfFP+grxT2YN8U96DfFP",
+    "data_start": 1341533624,
+    "bss_start": 1341456384
+}
\ No newline at end of file
diff --git a/pkg/espflasher/target_esp32p4_rev1.go b/pkg/espflasher/target_esp32p4_rev1.go
new file mode 100644
index 0000000..3510667
--- /dev/null
+++ b/pkg/espflasher/target_esp32p4_rev1.go
@@ -0,0 +1,80 @@
+package espflasher
+
+// ESP32-P4 Rev1 (ECO2, chip revision < 3.0) register addresses for USB
+// interface detection and watchdog control.
+// Reference: esptool/targets/esp32p4.py (P4-specific values) and
+// esptool/targets/esp32.py (ESP32ROM base-class SPI defaults P4 inherits).
+//
+// UARTDEV_BUF_NO is revision-dependent in esptool:
+//   rev <  3.0 (ECO2, this target):  0x4FF3FEB0 + 24 = 0x4FF3FEC8
+//   rev >= 3.0 (production, future): 0x4FFBFEB0 + 24 = 0x4FFBFEC8
+// The USB-JTAG/Serial sentinel is 6 on P4 (not 3 like C5/C6/H2).
+const (
+	esp32p4Rev1UARTDevBufNo              uint32 = 0x4FF3FEC8
+	esp32p4UARTDevBufNoUSBJTAGSerial     uint32 = 6
+
+	esp32p4LPWDTConfig0     uint32 = 0x50116000
+	esp32p4LPWDTWProtect    uint32 = 0x50116018
+	esp32p4LPWDTSWDConf     uint32 = 0x5011601C
+	esp32p4LPWDTSWDWProtect uint32 = 0x50116020
+)
+
+// ESP32-P4 Rev1 target definition.
+// Reference: https://github.com/espressif/esptool/blob/master/esptool/targets/esp32p4.py
+// Production silicon (rev >= 3.0) uses a different UARTDEV_BUF_NO address and
+// the esp32p4.json stub; it will land as a separate target when we have that hardware.
+
+var defESP32P4Rev1 = &chipDef{
+	ChipType:       ChipESP32P4Rev1,
+	Name:           "ESP32-P4-Rev1",
+	ImageChipID:    18,
+	UsesMagicValue: false,
+
+	SPIRegBase:  0x5008D000,
+	SPIUSROffs:  0x18,
+	SPIUSR1Offs: 0x1C,
+	SPIUSR2Offs: 0x20,
+	SPIMOSIOffs: 0x24,
+	SPIMISOOffs: 0x98,
+	SPIW0Offs:   0x58,
+
+	SPIMISODLenOffs: 0x28,
+	SPIMOSIDLenOffs: 0x24,
+
+	SPIAddrRegMSB: false,
+
+	UARTDateReg: 0x500CA08C,
+	UARTClkDiv:  0x500CA014,
+	XTALClkDiv:  1,
+
+	BootloaderFlashOffset: 0x2000,
+
+	SupportsEncryptedFlash: true,
+	ROMHasCompressedFlash:  true,
+	ROMHasChangeBaud:       true,
+
+	FlashFrequency: map[string]byte{
+		"80m": 0xF,
+		"40m": 0x0,
+		"20m": 0x2,
+	},
+
+	FlashSizes: defaultFlashSizes(),
+
+	PostConnect: esp32p4Rev1PostConnect,
+}
+
+func esp32p4Rev1PostConnect(f *Flasher) error {
+	uartDev, err := f.ReadRegister(esp32p4Rev1UARTDevBufNo)
+	if err != nil {
+		return nil
+	}
+
+	if uartDev == esp32p4UARTDevBufNoUSBJTAGSerial {
+		f.usesUSB = true
+		f.logf("USB-JTAG/Serial interface detected (ESP32-P4 rev1), disabling watchdogs")
+		return disableWatchdogsLP(f, esp32p4LPWDTConfig0, esp32p4LPWDTWProtect, esp32p4LPWDTSWDConf, esp32p4LPWDTSWDWProtect)
+	}
+
+	return nil
+}
diff --git a/pkg/espflasher/target_esp32p4_rev1_test.go b/pkg/espflasher/target_esp32p4_rev1_test.go
new file mode 100644
index 0000000..bc98c24
--- /dev/null
+++ b/pkg/espflasher/target_esp32p4_rev1_test.go
@@ -0,0 +1,71 @@
+package espflasher
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestESP32P4Rev1PostConnectUSBJTAG(t *testing.T) {
+	writeCount := 0
+	readCount := 0
+
+	mc := &mockConnection{
+		readRegFunc: func(addr uint32) (uint32, error) {
+			readCount++
+			if addr == esp32p4Rev1UARTDevBufNo {
+				return esp32p4UARTDevBufNoUSBJTAGSerial, nil
+			}
+			// Return 0 for SWD conf read
+			return 0, nil
+		},
+		writeRegFunc: func(addr, value, mask, delayUS uint32) error {
+			writeCount++
+			return nil
+		},
+	}
+	f := &Flasher{
+		conn: mc,
+		opts: &FlasherOptions{},
+	}
+
+	err := esp32p4Rev1PostConnect(f)
+	require.NoError(t, err)
+	assert.True(t, f.usesUSB, "usesUSB should be true for USB-JTAG/Serial")
+	assert.Greater(t, writeCount, 0, "should have written registers to disable watchdog")
+}
+
+func TestESP32P4Rev1PostConnectUART(t *testing.T) {
+	mc := &mockConnection{
+		readRegFunc: func(addr uint32) (uint32, error) {
+			return 0, nil // Not USB, return UART value
+		},
+	}
+	f := &Flasher{
+		conn: mc,
+		opts: &FlasherOptions{},
+	}
+
+	err := esp32p4Rev1PostConnect(f)
+	require.NoError(t, err)
+	assert.False(t, f.usesUSB, "usesUSB should be false for UART")
+}
+
+func TestESP32P4Rev1PostConnectSecureMode(t *testing.T) {
+	// Simulate read error (secure download mode)
+	mc := &mockConnection{
+		readRegFunc: func(addr uint32) (uint32, error) {
+			return 0, errors.New("register not readable") // Simulate unreadable register
+		},
+	}
+	f := &Flasher{
+		conn: mc,
+		opts: &FlasherOptions{},
+	}
+
+	err := esp32p4Rev1PostConnect(f)
+	require.NoError(t, err, "should gracefully handle read error")
+	assert.False(t, f.usesUSB, "should default to non-USB on read error")
+}
diff --git a/tools/update-stubs.go b/tools/update-stubs.go
index ccde755..1f11151 100644
--- a/tools/update-stubs.go
+++ b/tools/update-stubs.go
@@ -25,6 +25,7 @@ var chips = []string{
 	"esp32c5",
 	"esp32c6",
 	"esp32h2",
+	"esp32p4-rev1",
 }
 
 func main() {