diff --git a/src/bridge.h b/src/bridge.h
index 90b9f5b..f41c366 100644
--- a/src/bridge.h
+++ b/src/bridge.h
@@ -159,8 +159,6 @@ class BridgeClass {
 
     bool started = false;
 
-    MsgPack::str_t router_ver;
-
 public:
 
     explicit BridgeClass(HardwareSerial& serial) {
diff --git a/src/monitor.h b/src/monitor.h
index a1227bf..a9738ca 100644
--- a/src/monitor.h
+++ b/src/monitor.h
@@ -31,7 +31,7 @@ class BridgeMonitor: public Stream {
     RingBufferN<BufferSize> temp_buffer;
     struct k_mutex monitor_mutex{};
     bool _connected = false;
-    bool _compatibility_mode;
+    bool _compatibility_mode = true;
 
 public:
     explicit BridgeMonitor(BridgeClass& bridge): bridge(&bridge) {}
@@ -61,7 +61,7 @@ class BridgeMonitor: public Stream {
         bool out = false;
         _connected = bridge->call(MON_CONNECTED_METHOD).result(out) && out;
         MsgPack::str_t ver;
-        _compatibility_mode = !bridge->call(GET_VERSION_METHOD).result(ver);
+        _compatibility_mode = !bridge->getRouterVersion(ver);
         k_mutex_unlock(&monitor_mutex);
         return out;
     }