Mopeka std fixes (#5041)

Co-authored-by: Your Name <you@example.com>

tests/test2.yaml

@@ -397,6 +397,19 @@ sensor:
       name: MICS-4514 C2H5OH
     ammonia:
       name: MICS-4514 NH3
+  - platform: mopeka_std_check
+    mac_address: D3:75:F2:DC:16:91
+    tank_type: CUSTOM
+    custom_distance_full: 40cm
+    custom_distance_empty: 10mm
+    temperature:
+      name: Propane test temp
+    level:
+      name: Propane test level
+    distance:
+      name: Propane test distance
+    battery_level:
+      name: Propane test battery level
 
 time:
   - platform: homeassistant