lamps.php

lamps.php

<?php

$offafter=15*60;
$loop=60;
$lightstatus = array();
$lightstatus[0]='off';
$lightstatus[1]='on';



function lampset($state) {
	global $lightstatus;
	for ($i=13; $i<=15;$i++) {
		system("snmpset -v1 -c XXXXXXXXXX NETCONTROLIP .1.3.6.1.4.1.19865.2.3.1.$i.6.0 i $state >/dev/null 2>/dev/null");
	}
	echo "Lamps set to ".$lightstatus[$state]."\n";
	system('/usr/bin/twidge -c /home/vasil/.twidgerc update "initLab street lights turned '.$lightstatus[$state].' at `date +%H:%M`"');
}

function getstate() {
	$state = array();

	$state['sun']=`/usr/local/bin/sunpos -D 42.70N 23.33E `;
	$state['lamps']=`snmpget -v1 -c public NETCONTROLIP .1.3.6.1.4.1.19865.2.3.1.15.6.0|awk '{print $4}'| tr -d '\n'`;

	$doorjs=file_get_contents('http://DOORPI/status?key=XXXXXXXXXXX');
	$doorstat=json_decode($doorjs);

	$state['door']=$doorstat->latch;

	if (file_exists('/tmp/lamptrigger')) {
	//	unlink('/tmp/lamptrigger');
	//	the trigger needs to be removed by cron
		$state['trigger']=1;
	} else {
		$state['trigger']=0;
	}
	return $state;
}

function printstate($state) {
	global $lightstatus;
	echo "S ".time()." sun: ".$state['sun']." lights:".$lightstatus[$state['lamps']]." door:".$state['door']." trigger:".$state['trigger']."\n";
}

$doorstatechg=0;
$sn="/tmp/lamper";
$sock=socket_create(AF_UNIX, SOCK_DGRAM, 0);

@unlink($sn);
socket_bind($sock, $sn);
chmod($sn, 0777);
socket_set_nonblock($sock);


while(42) {
	$r = array($sock);
	$w = NULL;
	$e = NULL;
	socket_select($r, $w, $e, $loop);
	socket_recvfrom($sock, $buff, 1024, 0, $src);

	if (!empty($state)) $oldstate=$state;
	$state = getstate();
	$now=time();
	printstate($state);	

	if (!empty($oldstate)) {
		if ($state['door']!=$oldstate['door']) $doorstatechg=$now;
	}


	if ($state['lamps']=='1') {
	// Lamps are on
		if ($state['sun']=='day' && $state['trigger']==0) {
			// It's daytime,the lamps are on and there is not trigger, turn them off
			lampset(0);
			continue;
		}
		if ($state['sun']=='night' && $state['door']=='locked' && $state['trigger']==0 && $now-$doorstatechg>($offafter)) {
			// There's nobody in the lab (it was locked more than 15 minutes ago) and no trigger, turn the lamps off
			lampset(0);
			continue;
		}
	} else {
	// Lamps are off 
		if ($state['trigger']==1) {
			// unconditional turn on if the trigger is set
			lampset(1);
			continue;
		}
		if ($state['sun']=='night' && $state['door']=='unlocked') {
			// it's night and there are people in the lab
			lampset(1);
			continue;
		}
	}
}

while(42)!! 👍

What the heck... Why PHP? ;)