Test Scripts for Sensor Project

sensortest.py

import serial, time
import sys
import threading
# initialization and open the port

# possible timeout values:
#    1. None: wait forever, block call
#    2. 0: non-blocking mode, return immediately
#    3. x, x is bigger than 0, float allowed, timeout block call

ser = serial.Serial()
# ser.port = "/dev/ttyUSB0"
ser.port = "COM3"
# ser.port = "/dev/ttyS2"
ser.baudrate = 115200
ser.bytesize = serial.EIGHTBITS         # number of bits per bytes
ser.parity = serial.PARITY_NONE         # set parity check: no parity
ser.stopbits = serial.STOPBITS_ONE      # number of stop bits
# ser.timeout = None        #block read
ser.timeout = 1             # non-block read
# ser.timeout = 2           #timeout block read
ser.xonxoff = False         # disable software flow control
ser.rtscts = False          # disable hardware (RTS/CTS) flow control
ser.dsrdtr = False          # disable hardware (DSR/DTR) flow control
ser.writeTimeout = 2        # timeout for write

def monitor():
    # flush input buffer, discarding all its contents
    ser.flushInput()

    time.sleep(0.5)
    numOfLines = 0
    while True:
        # response =
        sys.stdout.write(ser.readline())
        numOfLines = numOfLines + 1
        if numOfLines >= 500:
            break
    ser.close()
def sendcmd():
    # flush output buffer, aborting current output
    # write data
    ser.flushOutput()
    while True:
        s = "S60 {\"ID\":\"ABCD-EFGH-HIJK-LHMO\",\"S\":23,\"P1\":102.38,\"P2\":100.68} "
        ser.write(s)
        sys.stdout.write(s + "\n")
        time.sleep(10)

try:
    ser.open()
except Exception, e:
    print "error open serial port: " + str(e)
    exit()
if ser.isOpen():
    try:
        r = threading.Thread(target=monitor)
        w = threading.Thread(target=sendcmd)
        r.start()
        w.start()

    except Exception, e1:
        print "error communicating...: " + str(e1)
else:
    print "cannot open serial port "