How to transfer Data from TouchDesigner to Arduino Board (beginner friendly)

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code for chopexecute

def onOffToOn(channel, sampleIndex, val, prev):
op(‘serial1’).send(‘2’,terminator =”)
return

def whileOn(channel, sampleIndex, val, prev):
return

def onOnToOff(channel, sampleIndex, val, prev):
op(‘serial1’).send(‘3’,terminator =”)
return

def whileOff(channel, sampleIndex, val, prev):
return

def onValueChange(channel, sampleIndex, val, prev):
return