Sync with upstream: battery_current datatype fix (U16->S16)

- Merged upstream changes from bohdan-s/SunGather
- Fixed battery_current register datatype from U16 to S16 for proper negative values
- Preserved local VS Code debug configuration
- Updated to SunGather v0.5.2

.vscode/tasks.json

@@ -0,0 +1,15 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Build and Push SunGather Docker Image (Multi-Arch)",
+            "type": "shell",
+            "command": "docker buildx build --push --platform linux/amd64,linux/arm64/v8 -t gitea.elixirtechnologies.au/alex/sungather:latest .",
+            "problemMatcher": [],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            }
+        }
+    ]
+}

SunGather/exports/mqtt.py

@@ -61,7 +61,24 @@ class export_mqtt(object):
         if reason_code == 0:
             logging.info(f"MQTT: Connected to {client._host}:{client._port}")
         if reason_code > 0:
-            logging.warn(f"MQTT: FAILED to connect {client._host}:{client._port}")
+            reason_messages = {
+                # MQTT 3.1.1
+                1: "Unacceptable Protocol Version",
+                2: "Identifier Rejected",
+                3: "Server Unavailable",
+                4: "Bad Username or Password",
+                5: "Not Authorized",
+                # MQTT 5.0 common
+                128: "Unspecified Error",
+                129: "Malformed Packet",
+                130: "Protocol Error",
+                131: "Implementation Specific Error",
+                135: "Not Authorized",
+                140: "Server Moved",
+                141: "Server Unavailable",
+            }
+            error_message = reason_messages.get(reason_code, "Unknown Error")
+            logging.warning(f"MQTT: FAILED to disconnect (reason {reason_code}): {error_message}")
 
     def on_disconnect(self, client, userdata, flags, reason_code, properties):
         if reason_code == 0:

SunGather/sungather.py

@@ -141,8 +141,10 @@ def main():
                     exports.append(getattr(export_load, "export_" + export.get('name'))())
                     retval = exports[-1].configure(export, inverter)
             except Exception as err:
-                logging.error(f"Failed loading export: {err}" +
-                            f"\n\t\t\t     Please make sure {export.get('name')}.py exists in the exports folder")
+                logging.error(
+                    f"Failed loading export '{export.get('name')}'",
+                    exc_info=True
+                )
 
     scan_interval = config_inverter.get('scan_interval')