[python]
import sys
import serial
import time

# raspberry pi usb cdc
# default usb device /dev/ttyACM0 115200 8n1
ser = serial.Serial(“/dev/ttyACM0”, 115200, timeout=0.5)

# raspberry pi ttl
# ser = serial.Serial(“/dev/ttyS0”, 115200, timeout=0.5)

#windows
# ser = serial.Serial(“COM45”, 115200, timeout=0.5)

print(‘serial test start …’)
if ser != None:
print(‘serial ready…’)
else:
print(‘serial not ready’)
sys.exit()

ser.timerout = 1 # read time out
ser.writeTimeout = 0.5 # write time out.

def printHex(_str):
for i in _str:
print(‘%02x’ % i, end=” “)
print(“”)

# Command Syntax
#
# Prefix Storage Tag SubTag {Data} [, SubTag {Data}] [; Tag SubTag {Data}] […] ;
# Suffix Among which, {data} means integrant while [data] means optional data.
#
# Prefix: “~0000” (HEX: 7E 01 30 30 30 30), 6 characters.
# StorageType:
# “@” or “#”,1 character.
# “@” means permanent setting which will not be lost by removing power from the scanner or rebooting it;
# “#” means temporary setting which will be lost by removing power from the scanner or rebooting it.
# Tag:
# A 3-character case-sensitive field that identifies the desired command group.
# For example, the Tag for the Enable Code 11 is C11 (see Example 1 of Chapter 1).
# SubTag:
# A 3-character case-sensitive field that identifies the desired parameter within the tag group.
# For example, the SubTag for the Enable Code 11 is ENA (see Example 1 of Chapter 1).
# Data:
# The value for a feature or parameter setting, identified by the Tag and SubTag.
# For example, the Data for the Enable Code 11 is 1 (see Example 1 of Chapter 1).
# Suffix:
# “;” (HEX: 3B 03), 2 characters.

def send_cmd(StorageType_Tag):
Prefix = bytes(“\x7E\x01\x30\x30\x30\x30″, encoding=”utf-8”)
Suffix = bytes(“\x3B\x03″, encoding=”utf-8”)

cmd = Prefix + bytes(StorageType_Tag, encoding=”utf-8″) + Suffix

print(“Sending:”)
printHex(cmd)

ser.write(cmd)

time.sleep(0.1)
recv = ser.read(ser.in_waiting)
print(“Response:”)
printHex(recv)

def start_scanning():
print(“start scanning”)
send_cmd(“#SCNTRG1”)
return

def stop_scanning():
print(“stop scanning”)
send_cmd(“#SCNTRG0”)
return
…
Please contact us to get full sample codes: sales@rtscan.net
[/python]