Projection Design (projector) GetPower function incorrect for certain models

[scroix]

Tested with the Projection Design F12, F32 & F35 models.

The local_action_GetPower() function has a couple of issues when used to communicate with some of the PD models.

Looking at the protocol manual, all GET commands require a ' ? ' argument. This is actually missing from the recipe's function.

local_action_GetPower()
currently: result = send_cmd('POST')
should be: result = send_cmd('POST', '?')

A correct response to this message takes the form of :
%001 POWR 000001

The final argument (000001) being the response rcvpack[1] referenced in the send_cmd function.

A valid response isn't prefaced by an ' ! ' as the code suggests :

  if(result=='!00000' or result=='!00001'):
    print 'power is off'

'!' refer to a series of error codes in response to invalid commands, such as missing an argument.

Additionally, sending a '?' argument nullifies the related assert statement in the send_cmd function. As the response doesn't contain this character, unlike if you sent a numerical argument.
if(arg): assert arg in rcvpack[1]