How to add LinkNLink eMotion sensor to OpenHAB

[veetrik (Vee Cortes)]

I ordered the LinknLink eMotion Human Radar sensor and and it can be query
using the ModBus TCP protocal. I set it up to work with OpenHAb as follows:

1. Install the Modbus Binding from the Add-on Store

2. create modbus.things or add to existing things file after editing host IP address :

```csv
Bridge modbus:tcp:remotehost [ host="192.168.x.xxx", port=502, id=1 ] 
{    
    Bridge poller holding [ start=802, length=1, refresh=5000, type="holding", maxTries=5]
	{
        Thing data hold802 [ readStart="802", readValueType="int16" ]
    }
}

3) Create modbus.item or add to existing item file:


```csv
Number eMotion "eMotion3 [%d]" { channel="modbus:tcp:remotehost:holding:hold802:number" }

4. Sample rule:

rule "eMotion3 changed Rule"  
when  
    Item eMotion changed
then
    logInfo("INFO","sensor-> eMotion {}", eMotion.state)
	if (eMotion.state == 1)
	{
		Upstairs_Light.sendCommand(ON) // Turn on light
	}
	else
	if (eMotion.state == 0)
	{
		Upstairs_Light.sendCommand(OFF) // Turn off light
	}
end