fix detect chiptype

detect_esp32.py

@@ -7,41 +7,65 @@ Detects and lists ESP32 devices connected via USB
 import serial.tools.list_ports
 import subprocess
 import sys
-
+import time
+import serial
 
 def detect_chip_type(port):
     """
     Try to detect the ESP32 chip type using esptool.py
     Returns chip type string or 'Unknown'
     """
-    try:
-        result = subprocess.run(
-            ['esptool.py', '--port', port, 'chip_id'],
-            capture_output=True,
-            text=True,
-            timeout=10
-        )
+    # Try to enter ROM bootloader via DTR/RTS before probing
+    try_enter_bootloader(port)
 
-        output = result.stdout + result.stderr
+    cmd = ['esptool.py', '--port', port, '--chip', 'auto', '--before', 'default_reset',
+        '--after', 'no_reset', 'chip_id']
+    try :
+        result = subprocess.run(cmd, capture_output=True, text=True, timeout=20)
+        output = (result.stdout or '') + (result.stderr or '')
 
-        if 'ESP32-S3' in output:
-            return 'ESP32-S3'
-        elif 'ESP32-S2' in output:
-            return 'ESP32-S2'
-        elif 'ESP32-C3' in output:
-            return 'ESP32-C3'
-        elif 'ESP32-C6' in output:
-            return 'ESP32-C6'
-        elif 'ESP32-H2' in output:
-            return 'ESP32-H2'
-        elif 'ESP32' in output:
-            return 'ESP32'
+        if result.returncode != 0:
+            last = output.strip().splitlines()[-1] if output.strip().splitlines() else 'esptool failed'
+            print(f"    esptool on {port} failed: {last}")
+            return 'Unknown'
 
-    except Exception:
-        pass
+        # Prefer exact "Chip is ..." line (e.g., ESP32-D0WD-V3)
+        for line in output.splitlines():
+            if line.startswith('Chip is '):
+                return line.replace('Chip is ', '').split(' (', 1)[0].strip()
+
+        # Fallback loose matches
+        for name in ('ESP32-S3','ESP32-S2','ESP32-C6','ESP32-C3','ESP32-H2','ESP32'):
+            if name in output:
+                return name
+
+    except FileNotFoundError:
+         print("    esptool.py not found (pip install esptool)")
+    except subprocess.TimeoutExpired:
+         print(f"    esptool on {port} timed out (check EN/IO0 wiring)")
+    except Exception as e:
+         print(f"    Error running esptool on {port}: {e}")
 
     return 'Unknown'
 
+def try_enter_bootloader(port):
+    """
+    Toggle DTR/RTS to enter download mode.
+    Assumes RTS->EN (active-low) and DTR->IO0 (active-low on many adapters).
+    Safe no-op if control lines aren't available.
+    """
+    try:
+        with serial.Serial(port, 115200, timeout=0.1) as ser:
+            ser.rts = True   # EN low
+            ser.dtr = True   # IO0 low
+            time.sleep(0.05)
+            ser.rts = False  # EN high
+            time.sleep(0.05)
+            ser.dtr = False  # IO0 high
+            time.sleep(0.05)
+    except Exception:
+        pass
+
 
 def guess_chip_type_from_usb(vid, pid):
     """