X10 with CM11a

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The purpose of the the first part is to connect the hardware. The second part of this page is to enable Domoticz to send X10 commands over the powerlines with the CM11a module. The third part enables Domoticz to listen to commands that are send over the powerlines by X10 modules. The CM11a is not supported from Domoticz directly but by following the below explanation it works nicely. I have got it workling together with a Raspberry PI.


Like always before doing an installation on a live system make a backup of the domoticz.db and better also a copy of the whole SD card (Image) before starting.

Part 1: Hardware

The CM11a was sold under various brand names and with various powerline connections. The connnection to the computer needa to be done with a serial to USB converter. The serial to USB converter delivered with the CM11a is supported by the raspberry PI already. If you have multiple USB devices please also read the page for persistent USB devices on this wiki.

Part 2: Enabling Domoticz to send X10 command using Heyu software

First Heyu software needs to be installed on the computer. This website will explain you how that works in more detail. Heyu Homepage

The raspberry installation does not come with a compiler. I used this compiler to compile the software.

sudo apt-get install build-essential

Try to get the usb device on port "ttyUSB0" please also see persistent USB devices. If you need to use an other USB device please alter this in the Heyu configuration file.

# /home/pi/.heyu/x10config
TTY	/dev/ttyUSB0

To test if the Heyu software can see the CM11a use this command in the terminal

heyu info

After installation of the software you can test sending commands from the command line in the terminal.

heyu on i7
heyu off a2

This command will send the X10 command "on" to the X10 housecode i number 7 and the off command to adres housecode a number 2

If this part is working you can add a dummy x10 device to your Domoticz setup. This dummy is to trigger a LUA script. This script execute the above mentioned HEYU system commands belonging to the X10 device module we want to configure in Domoticz.

-- ~/domoticz/scripts/lua/script_device_Apparaat01.lua
commandArray = {}
if (devicechanged['Apparaat01'] == 'On') then
	os.execute('sudo -u pi /home/pi/heyu-2.10/heyu on i11')
elseif (devicechanged['Apparaat01'] == 'Off') then
	os.execute('sudo -u pi /home/pi/heyu-2.10/heyu off i11')
return commandArray

To enable X10 dimmer modules in Domoticz we need to do a litlle more. First we need to setup an user variable the remembers the last dimm setting of the dimmer. This need to be done in Domoticz going to settings -> more options -> user variables. There an integer needs to be defined with a logical name. The this LUA script needs to be setup that executes the HEYU commands.

-- ~/domoticz/scripts/lua/script_device_LKantoor.lua
commandArray = {}
if (devicechanged['L Kantoor'] == 'On') then
	os.execute('sudo -u pi /home/pi/heyu-2.10/heyu on i1')
elseif (devicechanged['L Kantoor'] == 'Off') then
	os.execute('sudo -u pi /home/pi/heyu-2.10/heyu off i1')
elseif (devicechanged['L Kantoor'] == 'Set Level' and tonumber(otherdevices_svalues['L Kantoor']) > uservariables["L KantoorDimStand"]) then
	DimstandDelta = otherdevices_svalues['L Kantoor'] - uservariables["L KantoorDimStand"]
	os.execute('sudo -u pi /home/pi/heyu-2.10/heyu bright i1 ' .. math.ceil(DimstandDelta/14*22))
	commandArray['Variable:L KantoorDimStand']= tostring(uservariables["L KantoorDimStand"] + DimstandDelta)
elseif (devicechanged['L Kantoor'] == 'Set Level' and tonumber(otherdevices_svalues['L Kantoor']) < uservariables["L KantoorDimStand"]) then
	DimstandDelta = uservariables["L KantoorDimStand"] - otherdevices_svalues['L Kantoor']
	os.execute('sudo -u pi /home/pi/heyu-2.10/heyu dim i1 ' .. math.ceil(DimstandDelta/14*22))
	commandArray['Variable:L KantoorDimStand']= tostring(uservariables["L KantoorDimStand"] - DimstandDelta)
return commandArray

Please read the Heyu manual in the terminal for more nice functionality. Like "shopen"

heyu help

Part 3: Enabling Domoticz to listen to X10 command using Heyu software

First start heyu to work on the background

heyu start

To check if Heyu is indeed running execute this command, you now should see two lines of background processes

ps -A|grep heyu

To test if everty thing is working properly run the command in the terminal prompt.

heyu monitor

If you now send x10 command over the powerlines with a x10 transmitter you will see them in the terminal passing by.
To start Heyu at reboot and in case it fails (it does sometimes) it must be restarted again every hour. Run this command to edit the cron.

crontab -e

Now add these line to the file,

0 * * * * /home/pi/heyu-2.10/heyu start
@reboot /home/pi/heyu-2.10/heyu start

Now we can first define our aliases for x10 housecode and module numbers that we need in the heyu configuraton file. These aliases can also be used to send command from the tetrminal prompt. Please see some examples of defined

# /home/pi/.heyu/x10config
ALIAS  Switch_Keuken_Midden      I1   StdLM
ALIAS  Switch_Keuken_Hoog        I3   StdLM
ALIAS  Switch_Badkamer           I5   StdLM
ALIAS  Switch_Kamer              I6   StdLM

We can use the json api to let Heyu send commands to Domoticz. Please see this wiki for more explanation on json api. Please add in domoticz the IP adres of your pi to the safe ip adresses that do not need to login. This can be done in the setting, setting, local networks.

Here are some examples to use the domoticz api with json in the heyu configuration file.

# /home/pi/.heyu/x10config
SCRIPT Switch_Keuken_Midden off rcvi :: curl ""
SCRIPT Switch_Keuken_Hoog on rcvi :: curl ""
SCRIPT Switch_Badkamer on rcvi :: curl ""
SCRIPT Switch_Badkamer off rcvi :: curl ""
SCRIPT Switch_Kamer on rcvi :: curl ""
SCRIPT Switch_Kamer off rcvi :: curl ""

--Ronny (talk) 22:19, 30 November 2015 (CET)