Bought some large servers with Vincent. 3 ProLiant ML350 G6 with loads of memory and cores. My 2 nodes are running Ovirt Virtualisation, connected to a qnap iscsi host using 10gbps SFPs. Vincents server is running Proxmox.
For my home automation i’m using Home Assistant and Domoticz. All 433Mhz Temperature/Humidity are connected to a RFXcom device on two domoticx instances. (Master slave construction)
I’ve made a php script and a bash script to draw all sensors on a floorplan in realtime.
There is also a cron running which takes a snapshot of the generated image every 5 minutes. These images are being converted to MP4 and animated GIF to have a timelapse with all temperatures displayed on a floorplan.
An obfuscated view of the floorplan
The circles are where sensors are placed. Colors are from blue till red, representing the heat. In the center is the measured temperature value.
The (shortened) PHP script: (index.php)
<?php
header('Content-type: image/png');
// This is the floorplan empty ..
$png_image = imagecreatefrompng('plattegrondenmerge.png');
$white = ImageColorAllocate($png_image, 0, 0, 0);
$max = 40;
$min = -10;
// living
// getstate is a bash script (see below which gets the values from domoticz using curl)
// 840 is the domoticz idx
$temp840 = shell_exec('./getstate 840');
// A gray circle will be drawn if the temperature age is > 500 seconds
$age = shell_exec('./new.sh 18 840 500 >/dev/null || echo gray');
// location of circle
$start_x = 950;
$start_y = 760;
$line = $temp840 + 10;
// get x-th line from colors
$colorfromlist = shell_exec("tail --lines=$line ./colors2 | head -1");
if(strpos($age, "gray") !== false){
$colorfromlist = "128,128,128";
};
$colors = explode(",", $colorfromlist);
$color = imagecolorallocatealpha($png_image, $colors[0], $colors[1], $colors[2], 50);
// draw circle
imagefilledellipse ($png_image, $start_x, $start_y, 175, 175, $color);
$start_x = $start_x - 70;
$start_y = $start_y + 15;
// add text
imagettftext($png_image, 24, 0, $start_x, $start_y, $white, './verdana.ttf', $temp840);
// winecellar
$temp840 = shell_exec('./getstate 839');
$age = shell_exec('./new.sh 18 839 700 >/dev/null || echo gray');
$start_x = 560;
$start_y = 840;
$line = $temp840 + 10;
$colorfromlist = shell_exec("tail --lines=$line ./colors2 | head -1");
if(strpos($age, "gray") !== false){
$colorfromlist = "128,128,128";
};
$colors = explode(",", $colorfromlist);
$color = imagecolorallocatealpha($png_image, $colors[0], $colors[1], $colors[2], 50);
imagefilledellipse ($png_image, $start_x, $start_y, 175, 175, $color);
$start_x = $start_x - 70;
$start_y = $start_y + 15;
imagettftext($png_image, 24, 0, $start_x, $start_y, $white, './verdana.ttf', $temp840);
// ETC ETC
imagesavealpha($png_image, TRUE);
imagepng($png_image);
imagedestroy($png_image);
?>
getstate bash script (gets the temperature from domoticz instance1 given an idx)
I have a rol of printer paper that was used by an old 8bit computer. I forgot which one, one out of my collection.
Fractal-like ‘art’
I dont think it is thermal paper, maybe the printer uses electricity just like the movie clip you see below. (Well .. not using 220V directly on the paper maybe) 🙂
Having fun at our old place during moving to Hilversum.
