# node-red-contrib-powermateble

A <a href="http://nodered.org" target="_blank">Node-RED</a> node for interacting with a <a href="https://griffintechnology.com/us/powermate-bluetooth" target="_blank">PowerMate Bluetooth</a> device.

Under the hood, this node makes use of and thus has a dependency on the <a href="https://github.com/sandeepmistry/noble" target="_blank">noble</a> Node.js library.

## Prerequisites

### Linux

* Node.js v0.12.x or greater 
* Bluetooth 

Install the prerequisite bluetooth libraries by running the following command.

    sudo apt-get install bluetooth bluez libbluetooth-dev libudev-dev 

**Optional:** The ```noble``` library requires Node.js to run as sudo or root. Run the following command to grant the ```node``` binary ```cap_net_raw``` privileges so that this is no longer a requirement.

    sudo apt-get install libcap2-bin
    sudo setcap cap_net_raw+eip $(eval readlink -f '/path/to/node/binary')

## Install

Run the following command in the root directory of your Node-RED install

    npm install node-red-contrib-powermateble

## Usage

### powermate-in

A node that listens to a PowerMate Bluetooth device for device events.

Select or connect to a new PowerMate device via the _Device_ field by entering it's MAC address. The **msg.payload** property contains the parsed event value. Additionally, **msg.topic** contains the name of the captured event.

Possible events/value combinations are:

<table cellspacing="0" cellpadding="0" style="border-collapse:collapse;width:100%;">
	<thead>
		<tr>
			<td><b>Event</b></td>
			<td><b>Values</b></td>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td>battery</td>
			<td>
				<ul>
					<li>Integer percentage battery level between 0 and 100</li>
				</ul>
			</td>
		</tr>
		<tr>
			<td>knob</td>
			<td>
				<ul>
					<li>'release' for the release of a short press</li>
					<li>'clockwise' for a clockwise rotation</li>
					<li>'anticlockwise' for an anticlockwise rotation</li>
					<li>'hold1' to 'hold6' for a long press</li>
					<li>'holdClockwise' for a clockwise rotation whilst depressed</li>
					<li>'holdAnticlockwise' for an anticlockwise rotation whilst depressed</li>
					<li>'holdRelease' for the release of a long press</li>
				</ul>
			</td>
		</tr>
	</tbody>
</table>

#### Screenshots

![Screenshot1](https://cdn.rawgit.com/circuitbeard/node-red-contrib-powermateble/b65177cc94d5411f905d852e527a89e25f61f421/assets/screen1_2.PNG) 

_**Caption:** powermate-in config dalog_

![Screenshot2](https://cdn.rawgit.com/circuitbeard/node-red-contrib-powermateble/b65177cc94d5411f905d852e527a89e25f61f421/assets/screen1_3.PNG) 

_**Caption:** powermate-in device dialog_

![Screenshot3](https://cdn.rawgit.com/circuitbeard/node-red-contrib-powermateble/788d98dba4a0aa73fceb38dda342c58b25ab473a/assets/screen1.PNG) 

_**Caption:** powermate-in node wired to debug_

### powermate-led

A node that sets the brightness of a PowerMate Bluetooth device LED.

Select or connect to a new PowerMate device via the _Device_ field  by entering it's MAC address. Enter the percentage brightness into the _Brightness_ field to set the devices LED brightness. If left blank the passed in **msg.payload** will be used.

Setting a value of **-1** will pulse the LED.

#### Screenshots

![Screenshot4](https://cdn.rawgit.com/circuitbeard/node-red-contrib-powermateble/b65177cc94d5411f905d852e527a89e25f61f421/assets/screen2_2.PNG) 

_**Caption:** powermate-led config dialog_

![Screenshot5](https://cdn.rawgit.com/circuitbeard/node-red-contrib-powermateble/788d98dba4a0aa73fceb38dda342c58b25ab473a/assets/screen2.PNG) 

_**Caption:** powermate-LED node wired to random percentage generator_