I am thinking about moving some code from Minder to a PAC. (There is no PAC yet but have been coding using PICED and testing the code) The Minder sets a flag which would be picked up by the PAC and then the PAC would execute the required code. My question is, which would process the code quicker or more efficiently, the Minder or PAC? The code does the following Code only executed when we are home. Flag is set. A PIR would set a flag when triggered in Minder. There are no light sensors etc. In the PAC Module gets triggered when flag is set. Check if it is NIGHT, if not EXIT See if light is on If not, turn it on to a set % Start Timer If it is on, see it we turned it on before If yes, restart timer If PAC did not turn it on, then a switch turned it on so EXIT When timer reaches set time, turn off light and timer Martin