List of X10 commands

Code  Function     DescriptionOne WayTwo Way
0 0 0 0      All units off Switch off all devices with the house code indicated in the message                       X  
0 0 0 1 All lights on Switches on all lighting devices (with the ability to control brightness) X  
0 1 1 0 All lights off Switches off all lighting devices X  
0 0 1 0 On Switches on a device X  
0 0 1 1 Off Switches off a device X  
0 1 0 0 Dim Reduces the light intensity X  
0 1 0 1 Bright Increases the light intensity X  
0 1 1 1 Extended code Extension code   X
1 0 0 0 Hail request Requests a response from the device with the house code indicated in message   X
 1 0 0 1 Hail acknowledge Response to the previous command   X
1 0 1 0 Pre-set dim Allows the selection of two predefined levels of light intensity   X
1 1 0 1 Status is on Response to the Status Request indicating that the device is switched on   X
1 1 1 0 Status is off Response indicating that the device is switched off   X
1 1 1 1 Status request Request requiring the status of a device   X