diff --git a/examples/rpc_lite_client/rpc_lite_client.ino b/examples/rpc_lite_client/rpc_lite_client.ino
index 22a1ad2..aaeb392 100644
--- a/examples/rpc_lite_client/rpc_lite_client.ino
+++ b/examples/rpc_lite_client/rpc_lite_client.ino
@@ -1,10 +1,10 @@
 #include <Arduino_RPClite.h>
 
-SerialTransport transport(&Serial0);
+SerialTransport transport(&Serial1);
 RPCClient client(transport);
 
 void setup() {
-    Serial0.begin(115200);
+    Serial1.begin(115200);
     transport.begin();
     pinMode(LED_BUILTIN, OUTPUT);
     Serial.begin(9600);
diff --git a/examples/rpc_lite_server/rpc_lite_server.ino b/examples/rpc_lite_server/rpc_lite_server.ino
index 86faf69..81da0e1 100644
--- a/examples/rpc_lite_server/rpc_lite_server.ino
+++ b/examples/rpc_lite_server/rpc_lite_server.ino
@@ -1,6 +1,6 @@
 #include <Arduino_RPClite.h>
 
-SerialTransport transport(&Serial0);
+SerialTransport transport(&Serial1);
 RPCServer server(transport);
 
 int add(int a, int b){
@@ -16,7 +16,7 @@ MsgPack::str_t loopback(MsgPack::str_t message){
 }
 
 void setup() {
-    Serial0.begin(115200);
+    Serial1.begin(115200);
     transport.begin();
     pinMode(LED_BUILTIN, OUTPUT);
     Serial.begin(9600);
diff --git a/src/DummyTransport.h b/src/DummyTransport.h
index 89150e1..dc3b3b7 100644
--- a/src/DummyTransport.h
+++ b/src/DummyTransport.h
@@ -24,6 +24,7 @@ class DummyTransport: public ITransport {
 
         size_t write(const uint8_t* data, size_t size) override {
             // Mock write
+            (void)data;
             return size;
         }
 
diff --git a/src/wrapper.h b/src/wrapper.h
index b64e719..b43fab3 100644
--- a/src/wrapper.h
+++ b/src/wrapper.h
@@ -94,11 +94,7 @@ class RpcFunctionWrapper<R(Args...)>: public IFunctionWrapper {
             return false;
         }
 
-        //unpacker not ready if deserialization fails at this point
-        std::tuple<Args...> args;
-        if (!deserialize_all<Args...>(unpacker, args)) return false;
-
-        return handle_call(args, packer);
+        return handle_call(unpacker, packer);
 
 #ifdef HANDLE_RPC_ERRORS
     } catch (const std::exception& e) {
@@ -116,7 +112,10 @@ class RpcFunctionWrapper<R(Args...)>: public IFunctionWrapper {
 
     template<typename Dummy = R>
     typename std::enable_if<std::is_void<Dummy>::value, bool>::type
-    handle_call(auto&& args, auto&& packer) {
+    handle_call(MsgPack::Unpacker& unpacker, MsgPack::Packer& packer) {
+        //unpacker not ready if deserialization fails at this point
+        std::tuple<Args...> args;
+        if (!deserialize_all<Args...>(unpacker, args)) return false;
         MsgPack::object::nil_t nil;
         invoke_with_tuple(_func, args, arx::stdx::make_index_sequence<sizeof...(Args)>{});
         packer.serialize(nil, nil);
@@ -125,7 +124,10 @@ class RpcFunctionWrapper<R(Args...)>: public IFunctionWrapper {
 
     template<typename Dummy = R>
     typename std::enable_if<!std::is_void<Dummy>::value, bool>::type
-    handle_call(auto&& args, auto&& packer) {
+    handle_call(MsgPack::Unpacker& unpacker, MsgPack::Packer& packer) {
+        //unpacker not ready if deserialization fails at this point
+        std::tuple<Args...> args;
+        if (!deserialize_all<Args...>(unpacker, args)) return false;
         MsgPack::object::nil_t nil;
         R out = invoke_with_tuple(_func, args, arx::stdx::make_index_sequence<sizeof...(Args)>{});
         packer.serialize(nil, out);