Controls: Input and Response

Julian,

Thank you for your kind words.

All of the controls are "generic", meaning you have to define the function.

In the RasPiConnectServer directory, there is a sub directory called "ExecuteFiles". Look for the "BL-1" code using grep from the command line (if you don't know how to use grep, please learn! It's a fabulous command for the Raspberry Pi).

You will find it in "ExecuteFreqModLED.py".  The code for BL-1 looks like this (from the file):

    if (objectServerID == "BL-1"):

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

                       return outgoingXMLData

               output = subprocess.check_output(["uptime", ""])
               list = output.split("average:")
               list2 = list[1].split(",")
               if (Config.debug()):
                       print list2
                       print list2[0]
               element = list2[0]

               FMOutput = 1/(float(element)*4.0+0.01)



               responseData = "%3.2f, %3.2f, %s" % (FMOutput, float(element),"CPU Load")


               outgoingXMLData += BuildResponse.buildResponse(responseData)


       else:

               # invalid RaspiConnect Code
               outgoingXMLData += Validate.buildValidateResponse("NO")


       outgoingXMLData += BuildResponse.buildFooter()
       if (Config.debug()):
               print outgoingXMLData

       return outgoingXMLData


Look under "ExecuteFiles" to find the "ExecuteMeter.py" file.  These are all great examples on how to use a control.

Here is the code that finds the number of processes


      elif (objectServerID == "M-2"):

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

                       return outgoingXMLData

               p1 = subprocess.Popen(['ps', 'xaf'], stdout=subprocess.PIPE)
               p3 = subprocess.Popen(['wc', '-l'], stdin=p1.stdout,stdout=subprocess.PIPE)
               p1.stdout.close()  # Allow p1 to receive a SIGPIPE if p3 exits.
               output = p3.communicate()[0]
               numberofprocesses = int(output)
               responseData = "%i" % numberofprocesses
               outgoingXMLData += BuildResponse.buildResponse(responseData)
       else:
               # invalid RaspiConnect Code
               outgoingXMLData += Validate.buildValidateResponse("NO")


       outgoingXMLData += BuildResponse.buildFooter()

       return outgoingXMLData


Best regards,

BP