Huawei SmartLogger: add curtailment (#32585)

templates/definition/meter/huawei-smartlogger.yaml

@@ -3,7 +3,7 @@ products:
   - brand: Huawei
     description:
       generic: SmartLogger
-capabilities: ["battery-control"]
+capabilities: ["battery-control", "curtail"]
 params:
   - name: usage
     choice: ["grid", "pv", "battery"]
@@ -84,6 +84,33 @@ render: |
       decode: int64
     scale: 0.01
   maxacpower: {{ .maxacpower }}
+  curtail:
+    source: modbus
+    {{- include "modbus" . | indent 2 }}
+    register:
+      address: 40428 # Active power [–100%, 100%] - a negative value indicates the limit for active power supplied from the grid to the ESS
+      type: writesingle
+      encoding: int16
+    scale: 10
+  curtailed:
+    source: go
+    in:
+    - name: limit
+      type: int
+      config:
+        source: modbus
+        {{- include "modbus" . | indent 6 }}
+        register:
+          address: 40428 # Active power [–100%, 100%] - a negative value indicates the limit for active power supplied from the grid to the ESS
+          type: holding
+          decode: int16
+        scale: 0.1
+    script: |
+      percent := int(limit)
+      if percent < 0 || percent > 100 {
+        percent = 100
+      }
+      percent
   {{- end }}
   {{- if eq .usage "battery" }}
   power: