You can find the entire repo here.

config/sensor/nest.yaml

@@ -0,0 +1,25 @@
+###################################################
+## * [Nest Thermostats](http://amzn.to/2eAhB1k)
+# @CCOSTAN
+# Original Repo : https://github.com/CCOSTAN/Home-AssistantConfig
+###################################################
+
+- platform: nest
+  monitored_conditions:
+#     - 'temperature'
+#     - 'target'
+     - 'humidity'
+#     - 'operation_mode'
+#     - 'last_connection'
+#     - 'co_status'
+#     - 'smoke_status'
+
+- platform: template
+  sensors:
+     upstairs_away_mode:
+       value_template: "{{ is_state_attr('climate.upstairs', 'away_mode', 'on') }}"
+
+- platform: template
+  sensors:
+     downstairs_away_mode:
+       value_template: "{{ is_state_attr('climate.downstairs', 'away_mode', 'on') }}"