Operate a Coin Acceptor

from os import read, write

import serial,sys,time

#Commands that need to be sent to the interface

# M,1 -> Activate Master

# R,08 -> Reset Coin Changer

# R,0B -> Obtain Just Reset from Changer~

# R,09

# R,0F,00 -> Request additional Features (LVL 3+ Only)

# R,0F,01ZZZZZZZZ -> To enable desired features (depends on the changer's reply to previous command) (LVL 3+ Only)

# R,0A -> Tube Status

# R,0C,000F0000 # No manual Dispense (Last 2 Bytes), Coin Types 1,2,3 and 4 are accepted (000F , on first 2 bytes)

# R,0B -> Poll (In Loop)

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# COMMAND DEFINITION

ENABLE_MASTER="M,1"

RESET_COIN_ACCEPTOR="R,08"

REQUEST_SETUP_INFO="R,09"

EXPANSION_REQUEST="R,0F,00"

EXPANSION_FEATURE_ENABLE="R,0F,0100000000"

TUBE_STATUS_REQUEST="R,0A"

COIN_TYPE="R,0C,000F0000"

POLL="R,0B"

###########################################

#CHANGER RESPONSE TABLE

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def initSerialPort(portName):

    global ser

    ser = serial.Serial() #Create Serial Object

    ser.baudrate = 115200 #Set the appropriate BaudRate

    ser.timeout = 1 #The maximum timeout that the program waits for a reply. If 0 is used, the pot is blocked until readline returns

    ser.port = portName # Specify the device file descriptor

    ser.open() #Open the serial connection

def readSerial():

    global ser

    s = ser.readline().decode('ascii') # Read the response

    # DEBUG : print("Read from Serial port: " + s)

    return s

​

def write2Serial(message):

    global ser

    buff = message + "\n"

    ser.write(bytes(buff,'ascii')) #Write the version command "V\n" encoded in Binary    

​

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def initCoinAcceptor():

    write2Serial(ENABLE_MASTER)

    readSerial()

    write2Serial(RESET_COIN_ACCEPTOR)

    readSerial()

    write2Serial(REQUEST_SETUP_INFO)

    setupInfo = readSerial()

    print("Changer Setup Info:" + setupInfo)

    write2Serial(EXPANSION_REQUEST)

    expansion = readSerial()

    print("Changer Expansion Response:" + expansion)

    write2Serial(TUBE_STATUS_REQUEST)

    readSerial()

    write2Serial(COIN_TYPE)

    readSerial() 

​

def startPollLoop():

​

    while True:

        write2Serial(POLL) # Poll Coin Changer

        print("Changer Response:" + readSerial())

        time.sleep(0.5)

​

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if __name__ == "__main__":

    print("Qiba Simple python example to operate a coin acceptor\n\n")

    if len(sys.argv)  != 2:

        print("Usage: python VMCCoinAcceptor.py <port_name>")

        exit(1)

    portName = sys.argv[1]

    initSerialPort(portName)

    write2Serial("V")

    print("Device Firmware version:" + readSerial() + "\n")

    initCoinAcceptor()

    startPollLoop()