Check bauds until it looks like it might be good nmea data

baud_me_babe.py

import serial
import serial.tools.list_ports
import sys

# Common NMEA baud rates
BAUD_RATES = [4800, 9600, 38400, 115200]

def main():
  # Find available COM ports
  ports = [port.device for port in serial.tools.list_ports.comports()]
  print("Available COM Ports:", ports)

  # Check if there are any ports
  if not ports:
      print("❌ No COM ports found.")
      input("Press ENTER to Exit...")
      return 0

    
  valid_combos = []

  for port in ports:
      print(f"Checking {port}...")
      for baud in BAUD_RATES:
          try:
              with serial.Serial(port, baud, timeout=2) as ser:
                  line = ser.readline().decode(errors="ignore").strip()
                  if line.startswith("$"):  # NMEA sentences start with "$"
                      print(f"  ✅ NMEA Stream detected on {port} at {baud} baud - data: {line}")
                      valid_combos.append((port, baud))
          except Exception:
              pass  # Ignore errors and keep scanning

  if valid_combos:
      print("✅ Valid NMEA Streams Found:")
      for port, baud in valid_combos:
          print(f"  - {port} at {baud} baud")
  else:
    print("❌ No NMEA stream detected.")

  # Pause for user to see the results if they clicked the icon to run
  input("Press ENTER to Exit...")
  return 0

if __name__ == "__main__":
    sys.exit(main())