cm11a-js

A Node.js module for controlling X10 devices through a serial CM11A interface. It allows NodeJe applications to conrol X10 devices through the serial interface of the CM11A, and monitors status of X10 devices.

Installation

npm install cm11a-js

Usage

// Import the module
const CM11A = require('cm11a-js');

// Create an CM11 object
let cm11 = CM11A();

// Start the service, connecting to the Serial Port
cm11.start('/dev/ttyUSB0');

// Issue Commands
let units = ['A1', 'A2'];

cm11.turnOn(units);
cm11.dim(units, 11);
cm11.bright(units, 11);
cm11.turnOff(units);

// Close the connection to the CM11A
cm11.stop();

Commands

Start

cm11.start(port);

Opens serial communications with the CM11A on the specified serial port, and begins monitoring for unit status.

• port is the serial port to open, e.g. /dev/ttyUSB0 on Linux, and COM1 on Windows.

Stop

cm11.stop();

Close serial communications with the CM11A, and stops monitoring device status.

Turn On

cm11.turnOn(addresses);

Turns on the specified unit addresses.

• addresses is an array of X10 device addresses. e.g. ['A1', 'A3']

Turn Off

cm11.turnOff(addresses);

Turns off the specified unit addresses.

• addresses is an array of X10 device addresses. e.g. ['A1', 'A3']

Bright

cm11.bright(addresses, level);

Brightens the the specified unit addresses by the specfied level.

• addresses is an array of X10 device addresses. e.g. ['A1', 'A3']
• level is a value between 0 and 22, indicating how much to brighten the device. Note: this is a relative value, not an absolute value.

Dim

cm11.dim(addresses, level);

Dims the the specified unit addresses by the specfied level.

• addresses is an array of X10 device addresses. e.g. ['A1', 'A3']
• level is a value between 0 and 22, indicating how much to dim the device. Note: this is a relative value, not an absolute value.

setClock

cm11.setClock();

Sets the clock of the CM11A controller to the current time provided by the PC.

status

cm11.status();

Reads the status from the CM11A returns the status through the status callback event below.

Events

Calling modules can subscribe to the following events on cm11a-js interface.

Unit Status

Provides the status of X10 devices when the CM11A detects a change on the power line.

cm11a.on('unitStatus', callback);

When the status of a device changes, the callback function will be called with the following object:

{
    // An array of unit codes for which status is being reported.
    units: array,
        
    // The X10 Function that was called on the device       
    x10Function: string,
    
    // The level of the function is DIM or BRIGHT    
    level: number
}

Device Status

Provides the status of the CM11A as read from the device with the status() function.

cm11a.on('status', callback);

After the status has been read from the CM11A, the specified callback function will be called with the following object:

See section 9 in the Interface Communication Protocol on the Heyu website for more details.

{
    // Time since last battery change
    batteryTimer: value,
  
    // CM11A Firmware Revision
    firmwareRev: value,
  
    // An object containing values of the CM11A's clock
    time: {
        // Day of the year
        dayOfYear: value,

        // Hour of the day
        hours: value,

        // Minute of the hour
        minutes: value,

        // Second of the minute
        seconds: value
    },
    
    // An object containing the status of monitored devices
    monitoredDevices: {
        // House code being monitored
        houseCode: value,

        // Currently addressed devices    
        addresed: value,

        // On/Off status of monitored devices
        onOffStatus: value,

        // Dim status of the monitored devices
        dimStatus: value
    },
    // A bitmask indicating Which day it is (SMTWTFS)
    dayMask: value
}

Close

Notifies the calling software when communications with the CM11A have been closed.

cm11a.on('close', callback);

When the serial port has been closed, the specified callback function will be called with no parameters.

Acknowledgements

Heyu

Kudos to the Heyu project. Heyu provides a complete interface to the CM11A (and other devices). The documentation and research they have done has been priceless! Heyu ran my house for many years!