diff --git a/tools/AT_Debug/AT_Debug.ino b/tools/AT_Debug/AT_Debug.ino
index bc3245e..26db144 100644
--- a/tools/AT_Debug/AT_Debug.ino
+++ b/tools/AT_Debug/AT_Debug.ino
@@ -67,6 +67,8 @@ void loop() {
     return;
   }
 
+  SerialAT.begin(rate);
+
   // Access AT commands from Serial Monitor
   SerialMon.println(F("***********************************************************"));
   SerialMon.println(F(" You can now send AT commands"));
diff --git a/tools/Diagnostics/Diagnostics.ino b/tools/Diagnostics/Diagnostics.ino
index 8b6fe50..41d804d 100644
--- a/tools/Diagnostics/Diagnostics.ino
+++ b/tools/Diagnostics/Diagnostics.ino
@@ -12,10 +12,11 @@
 // Select your modem:
 #define TINY_GSM_MODEM_SIM800
 //#define TINY_GSM_MODEM_SIM900
+//#define TINY_GSM_MODEM_A6
 //#define TINY_GSM_MODEM_M590
 
 // Increase buffer fo see less commands
-#define GSM_RX_BUFFER 256
+#define TINY_GSM_RX_BUFFER 256
 
 #include <TinyGsmClient.h>
 #include <StreamDebugger.h>