Re: [misterhouse-users] When the elements in a group are changing fast

[John M. <mcc...@st...>]

John wrote: 
>> What is the correct strategy for processing a queue of group member
changes? 

Bruce replied:
> I'm not sure I follow the question...

John tries again:
Each member of the group is bound to a pin (configured as input) of a 
Weeder Digital IO Module. When the pin changes state, MH receives a 
three-byte packet, whose meaning ('on' or 'off') has been defined in 
an .mht file.

These packets may be coming fast, and a pin may have returned to the 
previous state (and sent an offsetting packet) before its first state-
change gets processed.

Is the following the right strategy for processing one incoming state 
change at a time? Will MH serve up one incoming member state change 
per pass?

if ('member on' eq state_now $All_Sensors 
 || 'member off' eq state_now $All_Sensors) {

    $sensorname = member_changed $All_Sensors;
    $sensorstate = 
      ('member on' eq state_now $All_Sensors) ? 'on' : 'off';   
    # Can't use $sensor->{state} since it may have changed. ? 
    
    # ....
    # Do things based on the state of $sensorname and $sensorstate
    # ....
}