fix (atorch_dt20_energymeter): improvements from device info

- over current is actually temperature
- some ranges are different
- some dps are missing

Full info is still not available for this device, so what could be
figured out from "Xtend tuya diagnostics" was added, but since there is no
description, some is still unclear.

Issue #3868

custom_components/tuya_local/devices/atorch_dt20_energymeter.yaml

@@ -61,22 +61,22 @@ entities:
         name: value
         unit: V
         range:
-          min: 1
-          max: 2750
+          min: 0
+          max: 42000
         mapping:
-          - scale: 10
+          - scale: 100
   - entity: number
     category: config
-    name: Overcurrent threshold
-    class: current
+    name: Over temperature threshold
+    class: temperature
     dps:
       - id: 105
         type: integer
         name: value
-        unit: A
+        unit: C
         range:
           min: 1
-          max: 1000
+          max: 1500
         mapping:
           - scale: 10
   - entity: number
@@ -90,7 +90,7 @@ entities:
         unit: W
         range:
           min: 1
-          max: 27500
+          max: 252000
   - entity: select
     category: config
     translation_key: language
@@ -194,6 +194,23 @@ entities:
             value: Measurement
           - dps_val: back
             value: Settings
+          - dps_val: display_off
+            value: "Off"
+  - entity: number
+    name: Undervoltage threshold
+    category: config
+    class: voltage
+    dps:
+      - id: 119
+        type: integer
+        optional: true
+        name: value
+        unit: V
+        range:
+          min: 0
+          max: 42000
+        mapping:
+          - scale: 100
   - entity: number
     category: config
     name: Mini measure amp
@@ -252,14 +269,16 @@ entities:
             value: ok
           - dps_val: ""
             value: ok
+          - dps_val: "off"
+            value: "off"
           - dps_val: ovp
-            value: Overvoltage
+            value: Over voltage
           - dps_val: opp
-            value: Overpower
+            value: Over power
           - dps_val: lvp
-            value: Undervoltage
+            value: Under voltage
           - dps_val: otp
-            value: Overtemp
+            value: Over temperature
   - entity: sensor
     name: Total charge
     dps:
@@ -324,4 +343,6 @@ entities:
           - dps_val: 500A
             value: "500 amp"
           - dps_val: 600A
+            value: "600 amp"
+          - dps_val: 1000A
             value: "1000 amp"