I very luckily got landed with a:
I wired the Tripwire sensor to the Phidget board as described in the wiring diagram and as shown in the video:
I connected the USB cable from the Phidgets Board to the USB port on a Raspberry Pi 3 and proceeded to compile the Phidget libraries on the Pi (info):
sudo apt-get install libusb-1.0-0-dev wget http://www.phidgets.com/downloads/libraries/libphidget.tar.gz tar xzf libphidget.tar.gz cd libphidget-2.1.8.20151217 ./configure make sudo make install
I then tested some C code examples:
wget http://www.phidgets.com/downloads/examples/phidget21-c-examples.tar.gz tar xzf phidget21-c-examples.tar.gz cd phidget21-c-examples-2.1.8.20151217 gcc HelloWorld.c -o HelloWorld -lphidget21 sudo ./HelloWorld
That successfully showed the Phidgets Board serial number so I moved on to the Python libraries:
wget http://www.phidgets.com/downloads/libraries/PhidgetsPython.zip unzip PhidgetsPython.zip cd PhidgetsPython sudo python setup.py install
With the python libraries installed I downloaded and tested a sample Python script:
wget http://www.phidgets.com/downloads/examples/Python.zip unzip Python.zip cd Python sudo python HelloWorld.py
Next I ran:
sudo python InterfaceKit-simple.py
This showed details of the Phidget Board including sensors connected to the Input/Output pins. When I activated and tripped the tripwire I could see the True/False outputs as follows:
Next I amended the InterfaceKit-simple.py script to print out a message when the sensor was tripped and to play a sound file. This could obviously be improved but is a starting point for what we are aiming to do.
#!/usr/bin/env python
"""Copyright 2010 Phidgets Inc.
This work is licensed under the Creative Commons Attribution 2.5 Canada License.
To view a copy of this license, visit http://creativecommons.org/licenses/by/2.5/ca/
"""
__author__ = 'Adam Stelmack'
__version__ = '2.1.8'
__date__ = 'May 17 2010'
#Basic imports
from ctypes import *
import sys
import random
import pygame
#Phidget specific imports
from Phidgets.PhidgetException import PhidgetErrorCodes, PhidgetException
from Phidgets.Events.Events import AttachEventArgs, DetachEventArgs, ErrorEventArgs, InputChangeEventArgs, OutputChangeEventArgs, SensorChangeEventArgs
from Phidgets.Devices.InterfaceKit import InterfaceKit
from Phidgets.Phidget import PhidgetLogLevel
#Create an interfacekit object
try:
interfaceKit = InterfaceKit()
except RuntimeError as e:
print("Runtime Exception: %s" % e.details)
print("Exiting....")
exit(1)
#Information Display Function
def displayDeviceInfo():
print("|------------|----------------------------------|--------------|------------|")
print("|- Attached -|- Type -|- Serial No. -|- Version -|")
print("|------------|----------------------------------|--------------|------------|")
print("|- %8s -|- %30s -|- %10d -|- %8d -|" % (interfaceKit.isAttached(), interfaceKit.getDeviceName(), interfaceKit.getSerialNum(), interfaceKit.getDeviceVersion()))
print("|------------|----------------------------------|--------------|------------|")
print("Number of Digital Inputs: %i" % (interfaceKit.getInputCount()))
print("Number of Digital Outputs: %i" % (interfaceKit.getOutputCount()))
print("Number of Sensor Inputs: %i" % (interfaceKit.getSensorCount()))
#Event Handler Callback Functions
def interfaceKitAttached(e):
attached = e.device
print("InterfaceKit %i Attached!" % (attached.getSerialNum()))
def interfaceKitDetached(e):
detached = e.device
print("InterfaceKit %i Detached!" % (detached.getSerialNum()))
def interfaceKitError(e):
try:
source = e.device
print("InterfaceKit %i: Phidget Error %i: %s" % (source.getSerialNum(), e.eCode, e.description))
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
def interfaceKitInputChanged(e):
source = e.device
print("InterfaceKit %i: Input %i: %s" % (source.getSerialNum(), e.index, e.state))
if e.index == 3 and e.state == True:
print(" ----- TRIPPED ----- ")
# Prepare the sound file
pygame.mixer.init()
pygame.mixer.music.load("fart.wav")
pygame.mixer.music.play()
def interfaceKitSensorChanged(e):
source = e.device
print("InterfaceKit %i: Sensor %i: %i" % (source.getSerialNum(), e.index, e.value))
def interfaceKitOutputChanged(e):
source = e.device
print("InterfaceKit %i: Output %i: %s" % (source.getSerialNum(), e.index, e.state))
#Main Program Code
try:
#logging example, uncomment to generate a log file
#interfaceKit.enableLogging(PhidgetLogLevel.PHIDGET_LOG_VERBOSE, "phidgetlog.log")
interfaceKit.setOnAttachHandler(interfaceKitAttached)
# interfaceKit.setOnDetachHandler(interfaceKitDetached)
interfaceKit.setOnErrorhandler(interfaceKitError)
interfaceKit.setOnInputChangeHandler(interfaceKitInputChanged)
interfaceKit.setOnOutputChangeHandler(interfaceKitOutputChanged)
interfaceKit.setOnSensorChangeHandler(interfaceKitSensorChanged)
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
print("Exiting....")
exit(1)
print("Opening phidget object....")
try:
interfaceKit.openPhidget()
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
print("Exiting....")
exit(1)
print("Waiting for attach....")
try:
interfaceKit.waitForAttach(10000)
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
try:
interfaceKit.closePhidget()
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
print("Exiting....")
exit(1)
print("Exiting....")
exit(1)
else:
# displayDeviceInfo()
print("Would normally display device ino but not today ")
print("Setting the data rate for tripwire sensor 3 to 4ms....")
try:
interfaceKit.setDataRate(3, 4)
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
#print("Setting the data rate for each sensor index to 4ms....")
#for i in range(interfaceKit.getSensorCount()):
# try:
#
# interfaceKit.setDataRate(i, 4)
# except PhidgetException as e:
# print("Phidget Exception %i: %s" % (e.code, e.details))
print("Press Enter to quit....")
chr = sys.stdin.read(1)
print("Closing...")
try:
interfaceKit.closePhidget()
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
print("Exiting....")
exit(1)
print("Done.")
exit(0)
