scan serial ports

serial_scan.py

#Scan a serial port at different baud rates looking for a human-readable terminal
#By: RSAXVC

import serial

#List of possible baud rates to scan
bauds = [ 110, 150, 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600]

#Path to POSIX port or Windows COM#
port = '/dev/ttyUSB0'
#Device query
query = b'\n\n*IDN?\n' #Ex: GW Instek GPD-3303S

for baud in bauds:
    ser = serial.Serial(port, timeout=.25, baudrate=baud, bytesize=8, parity='N', stopbits=1)  # open serial port
    ser.write(query)
    print baud,":",
    while True:
        line = ser.readline()
        if not line:
            print ""
            break
        print line
    ser.close()