I’ve been asked a few times about my custom front-end for my Domoticz, Hue and Sonos setup, so here are a few HTML snippets and where to put them, assuming you are running Domoticz on your home control server.
Right from the offset I must stress that the Icons I have used are made by various incredibly skilled designers at http://www.flaticon.com/ and therefore this front end cannot be used for any commercial purpose.
I have previously written an extensive post about the continuous development of a home control user interface and have posed a video containing my front end, so this post will not be about the thought process behind creating a UI, rather how I have managed to put one together using HTML.
I must also stress that I am not an expert in baking a web app. Developers may read my code and scoff at its inefficiency but it works for me, and hopefully can give you some inspiration.
Layout
The layout of all panels follows the same template: A main area where the actual buttons and controls live, changing depending on which screen the user selects; the ‘scenes’ bar, a blue strip towards the bottom of the display which is a kind of ‘quick access’ ribbon for regularly used commands; and a Links bar which permanently shows the pages that can be displayed.
There is also a ‘notifications’ display which shows up just above the scenes bar with information provided by a variable in Domoticz. This text can be ‘cleared’ by touching it (more on this later).
All screens use variations on the same HTML so not every screen is shown in detail in this post.
Home Screen
Home is where the heart is. I like the home screen to be simple, uncluttered and good looking. It’s by far the screen shown most regularly so less is more here.
The interesting part of this screen is the background. It changes depending on the weather. First I saved six 2000×600 backgrounds with names ranging from weatherback-rain.png to weatherback-fog.png. You need cloudy, fog, partlycloudy, rain, snow and sunny. I set the size of these backgrounds to fit the tablet which the screen is displayed on so you may need to adjust accordingly.
The HTML code to change the background depending on the weather is as follows (change xx, yyyy and zz to the address of your Domoticz server, the port Domoticz is using and the idx code of your weather source in Domoticz):
function updateweather(){
var forecast
var xmlhttp = new XMLHttpRequest();
var url = "http://192.168.1.xx:yyyy/json.htm?type=devices&rid=zz";
var forecast
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var myArr = JSON.parse(xmlhttp.responseText);
forecast = myArr.result[0].ForecastStr;
console.log("Forecast is " + forecast + ".")
// myFunction(myArr);
if (forecast == "Partly Cloudy") {
document.getElementById("weatherindicator").src = "weatherback-partlycloudy.png";
}
if (forecast == "Sunny") {
document.getElementById("weatherindicator").src = "weatherback-sunny.png";
}
if (forecast == "Rain") {
document.getElementById("weatherindicator").src = "weatherback-rain.png";
}
if (forecast == "Fog") {
document.getElementById("weatherindicator").src = "weatherback-fog.png";
}
if (forecast == "Snow") {
document.getElementById("weatherindicator").src = "weatherback-snow.png";
}
if (forecast == "Cloudy") {
document.getElementById("weatherindicator").src = "weatherback-cloudy.png";
}
}
}
xmlhttp.open("GET", url, true);
xmlhttp.send();
setTimeout(updateweather,60000);
}
Notice that the last line of this code sets up the web page to update the weather picture every 60 seconds. Ok, in the body of your HTML you’ll need something like
<div id="weatherdisplay" align="left" class="weatherback"><img id="weatherindicator" src=""></div>
And you’ll need something like this wherever you save your CSS:
div.weatherback {
position: fixed;
top: 0px;
left: 0px;
width: 1000px;
height:600px;
}
Activating Hue scenes
The API for Hue is relatively easy to use. I used the API to save scenes to each room and then can recall them from the press of an icon on the scenes bar. The HTML at the scene bar is easy:
<a href="javascript:;" onClick="groupscene(1,7);switchoff(24)"><img src="scene-cinema.png" width="150" height="150" border="0"></a>
The button called scene-cinema.png does two things actually, sets the group 1 to scene 7 and then switches of a switch in Domoticz. Let’s see the code for each of these functions:
function groupscene(group,scene){
execute('PUT', 'http://192.168.1.aa/api/bbbbbbb/groups/'+group+'/action', '{"scene":"'+scene+'"}');
}
Change aa to the address of your Hue bridge and bbbbbb to the name of the developer (if you followed the Hue API instructions from the Hue website this might be “newdeveloper”. If your scene does not change straight away then your control panel might not be authorised to the Hue bridge. If this is the case, press the button on the Hue bridge and then try again a couple of times.
function switchon(devicecode){
execute('PUT', 'http://192.168.1.xx:yyyy/json.htm?type=command¶m=switchlight&idx='+devicecode+'&switchcmd=On', '');
}
function switchoff(devicecode){
execute('PUT', 'http://192.168.1.xx:yyyy/json.htm?type=command¶m=switchlight&idx='+devicecode+'&switchcmd=Off', '');
}
function toggle(devicecode){
execute('PUT', 'http://192.168.1.xx:yyyy/json.htm?type=command¶m=switchlight&idx='+devicecode+'&switchcmd=Toggle', '');
}
function dim(devicecode,dimlevel){
execute('PUT', 'http://192.168.1.xx:yyyy/json.htm?type=command¶m=switchlight&idx='+devicecode+'&switchcmd=Set%20Level&level='+dimlevel, '');
}
The above codes (again change xx to the address of your Domoticz server and yyyy to the port number) are all similar. Switchon, switchoff do what they say on the tin. Toggle changes the state of an on/off switch and then dim sets a certain switch you specify (idx) to the dim level you select (dimlevel).
While we’re here, here’s a list of the other Hue functions I put into the home control system:
function lightoff(light){
execute('PUT', 'http://192.168.1.aa/api/bbbbbb/lights/'+light+'/state', '{"on":false}');
}
function lightmax(light){
execute('PUT', 'http://192.168.1.aa/api/bbbbbb/lights/'+light+'/state', '{"on":true,"bri":255,"sat":0,"hue":0}');
}
function briup(group){
execute('PUT', 'http://192.168.1.aa/api/bbbbbb/groups/'+group+'/action', '{"bri_inc":40}');
}
function bridn(group){
execute('PUT', 'http://192.168.1.aa/api/bbbbbb/groups/'+group+'/action', '{"bri_inc":-40}');
}
function groupcontrol(group,hue,bri,sat){
execute('PUT', 'http://192.168.1.aa/api/bbbbbb/groups/'+group+'/action', '{"on":true,"bri":'+bri+',"sat":'+sat+',"hue":'+hue+'}');
}
function groupscene(group,scene){
execute('PUT', 'http://192.168.1.aa/api/bbbbbb/groups/'+group+'/action', '{"scene":"'+scene+'"}');
}
So these are the main components of the home page – and here’s a snippet of how I go the inside and outside temperature (change zz to the idx of your temperature sensor):
function updateintemp(){
var instatus
var xmlhttp = new XMLHttpRequest();
var url = "http://192.168.1.xx:yyyy/json.htm?type=devices&rid=zz";
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var myArr = JSON.parse(xmlhttp.responseText);
instatus = "Inside: " + myArr.result[0].Data;
console.log(instatus)
document.getElementById("intemp").innerHTML = instatus
}
}
xmlhttp.open("GET", url, true);
xmlhttp.send();
setTimeout(updateintemp,20000);
}
You need a div with id “intemp” positioned where you like, and again the last part of the above code sets up the web app to update the temperature each 20 seconds.
Devices screen
The devices screen updates the icons with a green bar when the switch is on and a grey bar when off. I save two identical png pictures, one with -on.png at the end and one with -off.png. I enter this HTML repeatedly, changing the id and the source of the picture for each button:
<a href="javascript:;" onClick=”toggle(xx)"><img src="chesterlampoff.png" width="125" height="125" hspace="5" vspace="5" border="0" id="chesterlamp"></a>
Change xx to the idx of the device in Domoticz (you can find the idx of the device in the ‘Devices’ tab of the Domoticz interface.
Change the id=”chesterlamp” to id=”whateveryourdeviceiscalled” then change the img src to the ‘off’ picture for your device.
In the code part you need the following:
function updatedevice(idx,location,onimage,offimage){
console.log("checking status of idx "+idx)
var xmlhttp = new XMLHttpRequest();
var url = "http://192.168.1.94:8080/json.htm?type=devices&rid="+idx;
var onoff
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var myArr = JSON.parse(xmlhttp.responseText);
onoff = myArr.result[0].Status;
// myFunction(myArr);
}
if (onoff == "On") {
document.getElementById(location).src = onimage;
}
if (onoff == "Off") {
document.getElementById(location).src = offimage;
}
if (onoff == "Open") {
document.getElementById(location).src = onimage;
}
if (onoff == "Closed") {
document.getElementById(location).src = offimage;
}
}
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
Then another function where you will put all the code to tell the web app to update the icons depending on how Domoticz reports the switch (on or off, or even open or closed if you’re using door sensors too):
window.setInterval(function(){
updatedevice(187,'chesterlamp',"chesterlampon.png","chesterlampoff.png");
updatedevice(132,'washingmachine',"washingmachineon.png","washingmachineoff.png");
countup();
updatenotification(11)
}, 1000);
I’ve put two switches here, Chester’s lamp and the washing machine. You can add as many switches as you like here, as long as they have been set up in the body of the HTML.
There are two other functions that are called each second too: countup() and updatenotification(11)
Automatically reverting to the Home Screen
If you want the screen to revert to home after two minutes of inactivity, you can use this code:
First put
var ticker = 0;
at the start of your code block, then put:
function countup(){
ticker=ticker+1
console.log("Ticker is " + ticker);
if (ticker>120) {
console.log("Moving to index...")
MM_goToURL('self','index.htm');
}
}
This means that once the variable ‘ticker’ has incremented to 120, the screen will go to the page called index.htm. If you use this code, remember to put this at the end of each function:
ticker = 0;
This will reset the timer so that another 2 minutes have been added to the time before the page will switch to the Home Screen.
Notifications from Domoticz
I have set up the screens to show a strip which indicates what Domoticz is up to. Some of my LUA scripts in Domoticz update a variable with a string of text in English to tell the user what Domoticz is doing. This could be confirmation that a switch has been turned on/off or it could report is something has been triggered automatically.
First, create a string variable in Domoticz called LastEvent and then note down its idx. In the below case the idx is 11 (and there’s already a string update in there too, yours will be empty when you first set it up).
Back to the home control HTML:
function updatenotification(idx){
console.log("checking status of idx "+idx)
var xmlhttp = new XMLHttpRequest();
var url = "http://192.168.1.xx:yyyy/json.htm?type=command¶m=getuservariable&idx="+idx;
var textentry
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var myArr = JSON.parse(xmlhttp.responseText);
textentry = myArr.result[0].Value;
// myFunction(myArr);
document.getElementById("notification").innerHTML = textentry;
}
}
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
And:
function clearnotification(idx){
execute('PUT', "http://192.168.1.94:8080/json.htm?type=command¶m=updateuservariable&idx="+idx+"&vname=LastEvent&vtype=2&vvalue=%00", '');
}
And in the body of the HTML (so once the text is clicked the variable in Domoticz is reset to null):
Something like this for the CSS:
div.notificationpane {
position: fixed;
bottom: 250px;
left: 0px;
width: 100%;
font-size: 30pt;
background-color: #333333;
text-indent: 25px;
opacity: 0.6;
}
Then in the LUA script, when you want to notify the user about something, you can add a line like this:
commandArray['Variable:LastEvent'] = tostring(os.date("%H") .. ':' .. os.date("%M") .. ' Rear balcony door opened, lights on for 15 minutes.')
This adds the time and the text to the variable, which then almost immediately pops up on the Home Control screen until it is clicked.
Where to store your HTML
When you have created your masterpiece, you can save it in a new folder of your choice below the /domoticz/www/ folder. You can use something like WinSCP to create a folder and then transfer all your files in one go.
Then, when you usually navigate to 192.168.1.1:8080 to go to the Domoticz home screen, add / then the name of your folder then /index.htm or whatever your home screen address is.
Summary
Due to the jerry-rigged nature of my HTML code I am not going to publish it in its entirety. I also don’t know the ins and outs of using the flaticons.com icons and publishing them directly. Hopefully, however, this post will give you some inspiration to write your own home control front end.
Domoticz is a small-footprint program that you can install on pretty much any computer, but if you want to connect to your devices via radio waves, to send on/off/dim signals, and receive temperature or movement sensor data, you’ll need to buy a separate piece of hardware. I bought an 
Then, the exciting part. When you type in the Pi’s network address (eg 192.168.1.34) and add on the port number (the default of the Pi when Domoticz is first installed is 8080), you’ll see an unpopulated screen with no devices. Adding devices is done in quite an innovative way: devices that send information routinely, like temperature sensors for example, appear in the ‘unused devices’ tab and with a few clicks they can be added to your dashboard. Adding other hardware that uses network commands, such as the Philips Hue Bridge, is done via the Hardware Setup page.
We have 17 
Fabulous Home Automation 