feat: publish current config to MQTT

rust/src/main.rs

@@ -268,6 +268,7 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
         publish_firmware_info(&mut board, version, ip_address, &timezone_time.to_rfc3339()).await;
         publish_battery_state(&mut board).await;
         let _ = publish_mppt_state(&mut board).await;
+        publish_config(&mut board).await;
     }
 
     log(
@@ -804,6 +805,21 @@ async fn publish_battery_state(
     }
 }
 
+async fn publish_config(
+    board: &mut MutexGuard<'_, CriticalSectionRawMutex, HAL<'_>>,
+) {
+    let config = board.board_hal.get_config();
+    match serde_json::to_string(&config) {
+        Ok(serialized) => {
+            let _ = mqtt::publish("/config", &serialized).await;
+        }
+        Err(err) => {
+            info!("Error serializing config: {}", err);
+        }
+    }
+}
+
+
 async fn wait_infinity(
     board: MutexGuard<'_, CriticalSectionRawMutex, HAL<'static>>,
     wait_type: WaitType,