Add climate docs

source/_components/climate.eq3btsmart.markdown

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+---
+layout: page
+title: "EQ3 Bluetooth Smart Thermostats"
+description: "Instructions how to integrate EQ3 Bluetooth Smart Thermostats into Home Assistant."
+date: 2016-04-18 22:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: eq3.gif
+ha_category: Climate
+ha_iot_class: "Local Poll"
+---
+
+
+The `eq3btsmart` climate platform allows you to integrate EQ3 Bluetooth Smart Thermostats.
+
+The only functionality is to set the temperature, there doesn't seem to be any way to query the temperature sensor or battery level ([read more](https://forum.fhem.de/index.php/topic,39308.15.html)).
+
+Setup is a bit more cumbersome than for most other thermostats. It has to be paired first:
+
+```bash
+bluetoothctl
+scan on
+<Wait for the thermostat to be found, which looks like this: [NEW] Device 00:11:22:33:44:55 CC-RT-BLE>
+scan off
+<Set the thermostat to pairing mode.>
+pair <MAC>
+trust <MAC>
+disconnect <MAC>
+exit
+```
+
+Then check with gatttool if the connection works as expected:
+
+```bash
+gatttool -b 00:11:22:33:44:55 -I
+[00:11:22:33:44:55][LE]> connect
+Attempting to connect to 00:11:22:33:44:55
+Connection successful
+[00:11:22:33:44:55][LE]> char-write-req 0x0411 03
+Characteristic value was written successfully
+Notification handle = 0x0421 value: 02 01 09 14 04 2d
+[00:11:22:33:44:55][LE]> disconnect
+[00:11:22:33:44:55][LE]> exit
+```
+
+Important: For gatttool or homeassistant to work, the thermostat needs to be disconnected from bluetoothd, so I found it best to modify the hass-daemon startscript by adding:
+
+```bash
+/usr/bin/bt-device -d CC-RT-BLE
+```
+
+to the start function of /etc/init.d/hass-daemon.
+
+
+```yaml
+# Example configuration.yaml entry
+climate:
+  platform: eq3btsmart
+    devices:
+      room1:
+        mac: '00:11:22:33:44:55'
+```