maybe I will sound stupid...but...

Bist
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maybe I will sound stupid...but... Jul 30, 2013 1:45:18 GMT -8

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Post by Bist on Jul 30, 2013 1:45:18 GMT -8

Hi guys,

I have everything setup and working. Meaning I can connect the app to the server on an raspberry pi.
What I don't get is how I can control some GPIOs on the raspberry. I should add a button for example. But how the hell do I make it execute a python script for example.

Let's say I have a script called ledcontrol.py
How do I execute that script by pressing a button in the raspiconnect app?

Sorry for not seeing it..

Thanks a milion

SDL
Global Moderator

Posts: 5,655
Raspberry Pi: Yes
Other Device: PC, arduino, beagleBone

maybe I will sound stupid...but... Jul 30, 2013 8:20:55 GMT -8

Quote

Post by SDL on Jul 30, 2013 8:20:55 GMT -8

Hi Bist,

No, not a stupid question. Take a look at the documentation www2.milocreek.com:8080/wiki/index.php/RasPiConnectServer#Constructing_Your_Own_RasPiConnect_Responses_.28The_Magic.21.29

Copy over LocalExample.py to Local.py and then modify the file according to the documentation.

You can place your code in Local.py or put it into a python library and import it.

We are writing a separate tutorial for this and will have it done in August.

The key piece of code in your copied verison of Local.py to change is:

# not validate request, so execute

# note that python is in the main directory for this call, not the local directory

output = subprocess.call(["aplay", "sounds/match1.wav"])

Replace "output=...." with your own code for GPIO control.

Best regards,

BP

Bist
Guest

maybe I will sound stupid...but... Jul 31, 2013 22:55:05 GMT -8

Quote

Post by Bist on Jul 31, 2013 22:55:05 GMT -8

Hi,

Thanks for the response. Sounds a bit complicated for me. Always eager to learn. Few more questions

Would the command be something like this? output = subprocess.call(["python", "pathtopythonscript"]) ..is this correct? It's just a script which I like to run behind the button.

Next question. In this example we configured what is behind button called B-2......what if I want to add another button called B-3 or B-4 ....would I just add another section in local.py adding the other button or do I need to create more files like local.py.

I really want to understand this since I have no programming background but am I system administrator ;-) So i can more or less read what is happening ;-)

Thanks

SDL
Global Moderator

Posts: 5,655
Raspberry Pi: Yes
Other Device: PC, arduino, beagleBone

maybe I will sound stupid...but... Aug 1, 2013 8:25:53 GMT -8

Quote

Post by SDL on Aug 1, 2013 8:25:53 GMT -8

Bist,

Yes, subprocess.call(["python", "pathtopythonscript"]) will run your script. Remember adding DEBUG = True to your config.py will give you a lot of debugging help.

Yes, you are correct. Yes, add another section in the Local.py (remember it's a capital "L") file for "B-2", "B-3", etc.

BP

Bist Guest	maybe I will sound stupid...but... Aug 1, 2013 11:30:21 GMT -8 Quote Select Post Deselect Post Link to Post Back to Top Post by Bist on Aug 1, 2013 11:30:21 GMT -8 Alright...nice thanks..I will try this tonight

Bist
Guest

maybe I will sound stupid...but... Aug 1, 2013 11:41:51 GMT -8

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Post by Bist on Aug 1, 2013 11:41:51 GMT -8

OMG it works.....it's ALLLIIIVVEEEE mouhahaha

Thanks a milion BP

small question, if I wonna add another button in Local.py. I can see this is an IF statement. Can I just add the section with IF or should I do something with ELSE ?? or similar?

SDL
Global Moderator

Posts: 5,655
Raspberry Pi: Yes
Other Device: PC, arduino, beagleBone

maybe I will sound stupid...but... Aug 1, 2013 11:59:53 GMT -8

Quote

Post by SDL on Aug 1, 2013 11:59:53 GMT -8

Wooohoooooo!!!!!! Glad it is alive!

Just follow this model

# B-2 - play a beep on the Raspberry Pi
if (objectServerID == "B-2"):

code code code

# B-3 - start motor on Pi
if (objectServerID == "B-3"):

etc. etc.

Use the B-2 example as the model (cut and paste) so you can still validate your own controls.

Best regards,
BP

raspihawk New Member Posts: 3	maybe I will sound stupid...but... Feb 2, 2015 16:44:19 GMT -8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by raspihawk on Feb 2, 2015 16:44:19 GMT -8 would someone please upload a working Local.py of this? I can't seem to find where to insert the full B-2 code. thx

ve7mkf
New Member

Posts: 13

Raspberry Pi: Yes

maybe I will sound stupid...but... Feb 3, 2015 6:20:23 GMT -8

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Post by ve7mkf on Feb 3, 2015 6:20:23 GMT -8

Hi Raspihawk,

Here is my local.py file. Hopefully it makes some sense. In the local.py file, there is a "section" for each type of raspiconnect objects. In each section, you put the code for each different action. In my example, you will see, on line 77 it starts the section for BUTTON UITYPE. There I have 3 different action buttons. I think B-2 is the one you are looking for to play a sound. If you have other types of objects, e.g. voltmeter, you have a new section and there you will put code for each object of that type. Hopefully this is making sense.

Mike

#!/usr/bin/python
# Filename: LocalExample.py
# MiloCreek JS MiloCreek
# Version 2.8 8/12/13
#
# Local Execute Objects for RasPiConnect  
# to add Execute objects, modify this file 
#
#
#
# RasPiConnectServer interface constants

REMOTE_WEBVIEW_UITYPE = 1
ACTION_BUTTON_UITYPE = 16
FEEDBACK_ACTION_BUTTON_UITYPE = 17
SINGLE_LED_DISPLAY_UITYPE = 32
SPEEDOMETER_UITYPE = 64
VOLTMETER_UITYPE = 128
BARMETER_UITYPE = 129
SERVER_STATUS_UITYPE = 256
PICTURE_REMOTE_WEBVIEW_UITYPE = 512
LABEL_UITYPE = 1024
FM_BLINK_LED_UITYPE = 2048
TEXT_DISPLAY_UITYPE = 4096
TOGGLE_SWITCH_UITYPE = 33
SEND_TEXT_UITYPE = 34

# system imports
import sys
import subprocess
import RPi.GPIO as GPIO
import time
import os
import glob
import picamera

# RasPiConnectImports

import Config
import Validate
import BuildResponse 

def ExecuteUserObjects(objectType, element):

	# Example Objects

	# fetch information from XML for use in user elements

	#objectServerID is the RasPiConnect ID from the RasPiConnect App

        objectServerID = element.find("./OBJECTSERVERID").text
        objectID = element.find("./OBJECTID").text

        if (Config.debug()):
        	print("objectServerID = %s" % objectServerID)
	# 
	# check to see if this is a Validate request
	#
        validate = Validate.checkForValidate(element)

        if (Config.debug()):
        	print "VALIDATE=%s" % validate

        
	# Build the header for the response

	outgoingXMLData = BuildResponse.buildHeader(element)


	# objects are split up by object types by Interface Constants
	#
	#
	#
	# search for matches to object Type 

	# object Type match
	if (objectType == ACTION_BUTTON_UITYPE):

		if (Config.debug()):
			print "ACTION_BUTTON_UITYPE of %s found" % objectServerID

		# B-2 - play a beep on the Raspberry Pi
		if (objectServerID == "B-2"):	

                	#check for validate request
			# validate allows RasPiConnect to verify this object is here 
                	if (validate == "YES"):
                        	outgoingXMLData += Validate.buildValidateResponse("YES")
                        	outgoingXMLData += BuildResponse.buildFooter()
                        	return outgoingXMLData

			# not validate request, so execute

			# note that python is in the main directory for this call, not the local directory

			output = subprocess.call(["aplay", "sounds/match1.wav"])
			
			responseData = "OK"
                	outgoingXMLData += BuildResponse.buildResponse(responseData)
      			outgoingXMLData += BuildResponse.buildFooter()
                	return outgoingXMLData

		# B-3 Take a photo with the RasPi Camera
		if (objectServerID == "B-3"):	

                	#check for validate request
			# validate allows RasPiConnect to verify this object is here 
                	if (validate == "YES"):
                        	outgoingXMLData += Validate.buildValidateResponse("YES")
                        	outgoingXMLData += BuildResponse.buildFooter()
                        	return outgoingXMLData

			# not validate request, so execute

			# note that python is in the main directory for this call, not the local directory

		#	output = subprocess.call(["raspistill", "-o", "static/picamera.jpg"])
			with picamera.PiCamera() as camera:
				camera.resolution = (1024, 768)
				camera.start_preview()
				time.sleep(2)
				camera.capture('static/picamera.jpg')

			responseData = "OK"
                	outgoingXMLData += BuildResponse.buildResponse(responseData)
      			outgoingXMLData += BuildResponse.buildFooter()
                	return outgoingXMLData


		# B-12 - turn on GPIO 7 (LED)
		if (objectServerID == "B-12"):

			#check for validate request
			# validate allows RasPiConnect to verify this object is here
			if (validate == "YES"):
				outgoingXMLData += Validate.buildValidateResponse("YES")
				outgoingXMLData += BuildResponse.buildFooter()
				return outgoingXMLData

			# not validate request, so execute

			GPIO.setmode(GPIO.BCM)
			GPIO.setup(7,GPIO.OUT)
			GPIO.output(7,GPIO.HIGH)
			time.sleep(2)
			GPIO.output(7,GPIO.LOW)
			GPIO.cleanup ()

			responseData = "OK"
			outgoingXMLData += BuildResponse.buildResponse(responseData)
			outgoingXMLData += BuildResponse.buildFooter()
			return outgoingXMLData
		
	if (objectType == PICTURE_REMOTE_WEBVIEW_UITYPE):

                if (Config.debug()):
                        print "PICTURE_REMOTE_WEBVIEW_UITYPE of %s found" % objectServerID

		#W-15 is latest pi camera picture
                if (objectServerID == "W-15"):

                        #check for validate request
                        if (validate == "YES"):
                                outgoingXMLData += Validate.buildValidateResponse("YES")
                                outgoingXMLData += BuildResponse.buildFooter()
                                return outgoingXMLData

                        # normal response requested

                        imageName = "picamera.jpg"


                        responseData = "<html><head>"
                        responseData += "<title></title><style>body,html,iframe{margin:0;padding:0;}</style>"
                        responseData += "</head>"
                        responseData += "<body><img src=\""
                        responseData += Config.localURL()
                        responseData += "static/"
                        responseData += imageName
                        responseData += "\" type=\"jpg\" width=\"723\" height=\"500\">"
			responseData += "<BR>Picture<BR>"
                        responseData += "</body>"
                        responseData += "</html>"
                        outgoingXMLData += BuildResponse.buildResponse(responseData)
                        outgoingXMLData += BuildResponse.buildFooter()
                        return outgoingXMLData

	if (objectType == VOLTMETER_UITYPE):

                if (Config.debug()):
                        print "VOLTMETER_UITYPE of %s found" % objectServerID

		#M-1 is DS18B20 temperature
                if (objectServerID == "M-1"):

                        #check for validate request
                        if (validate == "YES"):
                                outgoingXMLData += Validate.buildValidateResponse("YES")
                                outgoingXMLData += BuildResponse.buildFooter()
                                return outgoingXMLData

                        # normal response requested
			os.system('modprobe w1-gpio')
			os.system('modprobe w1-therm')

			base_dir = '/sys/bus/w1/devices/'
			device_folder = glob.glob(base_dir + '28*')[0]
			device_file = device_folder + '/w1_slave'

			def read_temp_raw():
			    f = open(device_file, 'r')
			    lines = f.readlines()
			    f.close()
			    return lines

			lines = read_temp_raw()
			while lines[0].strip()[-3:] != 'YES':
			    time.sleep(0.2)
			    lines = read_temp_raw()
			equals_pos = lines[1].find('t=')
			if equals_pos != -1:
			    temp_string = lines[1][equals_pos+2:]
			temp_c = float(temp_string) / 1000.0

                        responseData = "%3.2f" % temp_c
                        outgoingXMLData += BuildResponse.buildResponse(responseData)
                        outgoingXMLData += BuildResponse.buildFooter()
                        return outgoingXMLData


	else:
		return ""
	# returning a zero length string tells the server that you have not matched 
	# the object and server 
	return ""

Last Edit: Feb 3, 2015 6:22:32 GMT -8 by ve7mkf

SDL Global Moderator Posts: 5,655 Raspberry Pi: Yes Other Device: PC, arduino, beagleBone	maybe I will sound stupid...but... Feb 10, 2015 10:20:43 GMT -8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by SDL on Feb 10, 2015 10:20:43 GMT -8 ve7mkf, Perfect response. Thank you! Best regards, BP

Post by Bist on Jul 30, 2013 1:45:18 GMT -8

Post by SDL on Jul 30, 2013 8:20:55 GMT -8

Post by Bist on Jul 31, 2013 22:55:05 GMT -8

Post by SDL on Aug 1, 2013 8:25:53 GMT -8

Post by Bist on Aug 1, 2013 11:30:21 GMT -8

Post by Bist on Aug 1, 2013 11:41:51 GMT -8

Post by SDL on Aug 1, 2013 11:59:53 GMT -8

Post by raspihawk on Feb 2, 2015 16:44:19 GMT -8

Post by ve7mkf on Feb 3, 2015 6:20:23 GMT -8

Post by SDL on Feb 10, 2015 10:20:43 GMT -8

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