Adolfo Reyna
72 lines
2.0 KiB
Python
72 lines
2.0 KiB
Python
import serial
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import time
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import os
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import sys
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PORT = '/dev/cu.usbmodem101'
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print("=== MicroPython Boot Interrupter & Recovery Tool ===")
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print(f"Waiting for {PORT} to appear. Please press the RESET button on the board...")
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while True:
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try:
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ser = serial.Serial(PORT, 115200, timeout=1.0)
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print("\n[+] Port opened successfully!")
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break
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except Exception as e:
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# Port not present or busy
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time.sleep(0.01)
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print("[*] Sending Ctrl-C storm to halt boot sequence...")
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# Send 100 Ctrl-C interrupts in rapid succession
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for _ in range(100):
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try:
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ser.write(b'\x03')
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time.sleep(0.005)
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except Exception as e:
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print(f"Write error during storm: {e}")
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break
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time.sleep(0.1)
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ser.reset_input_buffer()
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# Check if we have REPL access by sending a newline and expecting a prompt
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print("[*] Verifying REPL responsiveness...")
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ser.write(b'\r\n')
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time.sleep(0.2)
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if ser.in_waiting:
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resp = ser.read(ser.in_waiting)
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print(f"REPL Response:\n{resp.decode('utf-8', errors='ignore')}")
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else:
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print("[-] No response to newline, trying to force it...")
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ser.write(b'\x03\r\n')
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time.sleep(0.2)
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resp = ser.read(ser.in_waiting)
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print(f"REPL Response:\n{resp.decode('utf-8', errors='ignore')}")
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# Try to rename main.py to stop it from running on subsequent boots
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print("[*] Attempting to disable main.py...")
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rename_code = b"""
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import os
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try:
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os.rename('main.py', 'main_bad.py')
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print('RENAME:OK')
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except Exception as e:
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print('RENAME:ERROR:', e)
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"""
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ser.write(rename_code + b'\r\n')
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time.sleep(0.5)
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if ser.in_waiting:
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result = ser.read(ser.in_waiting).decode('utf-8', errors='ignore')
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print(f"Execution Output:\n{result}")
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if "RENAME:OK" in result:
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print("[+] SUCCESS! main.py has been disabled.")
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print("[+] You can now safely upload files or reboot.")
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else:
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print("[-] Rename failed or returned unexpected output.")
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else:
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print("[-] No response to rename command.")
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ser.close()
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