fix(telegraf): keep full decision text in sample config

config/telegraf.sample.conf

@@ -22,6 +22,41 @@
       topic = "+/batcontrol/+"
       measurement = "_/measurement/_"
       tags = "_/_/pivot_field"
+   # The "value" parser keeps only the last whitespace separated token of a
+   # payload, so free text like /decision would arrive truncated. It is
+   # handled by the dedicated consumer below instead.
+   [inputs.mqtt_consumer.tagdrop]
+      pivot_field = ["decision"]
+
+# /decision is a full sentence ("Charge from Grid 1250 W - ..."), so it needs
+# a parser that takes the payload as a whole instead of the "value" parser.
+[[inputs.mqtt_consumer]]
+   servers = ["tcp://mqtt:1883"]
+   topics  = [
+	"house/batcontrol/decision"
+	]
+   name_override = "batcontrol-decision"
+   data_format   = "grok"
+   grok_patterns = ["%{GREEDYDATA:decision}"]
+
+# Optional: the machine readable side of the same status change. "reason" is
+# null until the first decision with a decisive step, hence optional ("mode" is always an int).
+#[[inputs.mqtt_consumer]]
+#   servers = ["tcp://mqtt:1883"]
+#   topics  = [
+#	"house/batcontrol/decision/attributes"
+#	]
+#   name_override = "batcontrol-decision"
+#   data_format = "json_v2"
+#   [[inputs.mqtt_consumer.json_v2]]
+#      [[inputs.mqtt_consumer.json_v2.tag]]
+#         path = "decided_by.reason"
+#         rename = "reason"
+#         optional = true
+#      [[inputs.mqtt_consumer.json_v2.field]]
+#         path = "mode"
+#         type = "int"
+#         optional = true
 
 [[inputs.mqtt_consumer]]
    servers = ["tcp://mqtt:1883"]