adding command line sensor

sensors/sensors.yaml

@@ -17,3 +17,12 @@
 - platform: command_line
   name: Python Version
   command: "python3 --version"
+
+- platform: command_line
+  command: 'curl -s -m 20 -H "Content-Type: application/json" -X GET cypher/matemeter/api.php'
+  name: remaining_bottles
+  json_attributes:
+    - remaining_bottles
+  value_template: "{{ value_json.remaining_bottles |int }}"
+  scan_interval: 20
+  command_timeout: 30