audio fixes attempt

drb-c2-core/app/routers/nodes.py

@@ -1,5 +1,5 @@
 import secrets
-from fastapi import APIRouter, HTTPException, Depends
+from fastapi import APIRouter, HTTPException, Depends, Query
 from app.models import CommandPayload
 from app.internal import firestore as fstore
 from app.internal.mqtt_handler import mqtt_handler
@@ -93,7 +93,12 @@ async def reissue_node_key(node_id: str, _: dict = Depends(require_admin_token))
 
 
 @router.post("/{node_id}/config/{system_id}")
-async def assign_system(node_id: str, system_id: str):
+async def assign_system(
+    node_id: str,
+    system_id: str,
+    hardware_preset: str = Query("rtl-sdr-v3"),
+    ppm_override: float = Query(None),
+):
     """
     Assign a system to a node. Fetches the system config from Firestore
     and pushes it to the node via MQTT, then marks the node as configured.
@@ -106,13 +111,22 @@ async def assign_system(node_id: str, system_id: str):
     if not system:
         raise HTTPException(404, f"System '{system_id}' not found.")
 
-    # Push config to the node via MQTT
-    mqtt_handler.push_config(node_id, system)
+    # Include hardware preset in the push so the edge node applies it when
+    # generating the OP25 config. Strip it from the system doc first so it
+    # doesn't collide with SystemConfig field validation on the node side.
+    push_payload = {**system, "hardware_preset": hardware_preset}
+    if ppm_override is not None:
+        push_payload["ppm_override"] = ppm_override
+    mqtt_handler.push_config(node_id, push_payload)
 
     # Update Firestore
-    await fstore.doc_update("nodes", node_id, {
+    node_updates = {
         "assigned_system_id": system_id,
         "configured": True,
-    })
+        "hardware_preset": hardware_preset,
+    }
+    if ppm_override is not None:
+        node_updates["ppm_override"] = ppm_override
+    await fstore.doc_update("nodes", node_id, node_updates)
 
     return {"ok": True}