Support multiple sensors.

.gitignore

@@ -1,2 +1,3 @@
 data.csv
 .ruby-version
+config.yaml

config.yaml.example

@@ -4,3 +4,5 @@ mqtt_server: mqtt://192.168.178.48
 sensors:
   zigbee2mqtt/0x00158d00073a7ba8:
     name: Test Sensor
+  zigbee2mqtt/0x00158d0007110b9a:
+    name: Lorem ipsum

logger.rb

@@ -13,20 +13,22 @@ sensors_config = config['sensors']
 
 # Connect to the MQTT broker
 MQTT::Client.connect(config['mqtt_server']) do |client|
-  # For each sensor
-  sensors_config.each_key do |sensor_topic|
-    sensor = sensors_config[sensor_topic]
-    # Subscribe its topic
-    client.get(sensor_topic.to_s) do |topic, message|
+  # Subscribe topics
+  client.get('zigbee2mqtt/#') do |topic, message|
+    # Only observe configured sensors
+    next unless sensors_config.keys.include?(topic)
+
+    sensor = sensors_config[topic]
+
     # Log the output
-      puts "#{sensor["name"]}: #{message}"
+    puts "#{sensor['name']}: #{message}"
 
     payload = JSON.parse(message)
 
     # Log payload in a csv file
     CSV.open('data.csv', 'ab') do |csv|
       csv << [Time.now,
-                sensor["name"],
+              sensor['name'],
               topic,
               payload['humidity'],
               payload['temperature'],
@@ -37,4 +39,3 @@ MQTT::Client.connect(config['mqtt_server']) do |client|
     end
   end
 end
-end