diff --git a/contrib/etc/ebusd/mqtt-hassio.cfg b/contrib/etc/ebusd/mqtt-hassio.cfg
index 4b426509..3ad026c6 100644
--- a/contrib/etc/ebusd/mqtt-hassio.cfg
+++ b/contrib/etc/ebusd/mqtt-hassio.cfg
@@ -229,6 +229,18 @@ state_class ?= ,
 unit_of_measurement ?= ,
   "unit_of_measurement":"%unit"
 
+# HA integration: optional variable with the minimum numeric value
+min_number ?= ,
+  "min":%min
+
+# HA integration: optional variable with the maximum numeric value
+max_number ?= ,
+  "max":%max
+
+# HA integration: optional variable with the numeric step value
+step_number ?= ,
+  "step":%step
+
 # field type part suffix to use instead of the field type itself, see below.
 # HA integration: %type_part variable mapped from the mapped %type_topic
 type_part-by = %type_topic
@@ -237,10 +249,7 @@ type_part-by = %type_topic
 # %type_part).
 # HA integration: %type_part variable for number %type_topic
 type_part-number = ,
-  "command_topic":"%topic/set",
-  "min":%min,
-  "max":%max,
-  "step":%step%unit_of_measurement%state_class%type_class_number
+  "command_topic":"%topic/set"%min_number%max_number%step_number%unit_of_measurement%state_class%type_class_number
 
 # HA integration: %type_part variable for sensor %type_topic
 type_part-sensor = %unit_of_measurement%state_class%type_class_sensor