diff --git a/ModemPool.py b/ModemPool.py
index 7e7ae22..7122d4e 100644
--- a/ModemPool.py
+++ b/ModemPool.py
@@ -91,12 +91,16 @@ class ModemPool:
 
     def _send_command(self, cmd: str, ser, wait_time_in_s: int = 0) -> bytes:
         ser.write(cmd.encode())
-        msg = ser.read(100)
-        count = 0
-        while 'OK' not in str(msg) and count < wait_time_in_s:
-            time.sleep(1)
-            count = count + 1
+        msg = None
+        try:
             msg = ser.read(100)
+            count = 0
+            while 'OK' not in str(msg) and count < wait_time_in_s:
+                time.sleep(1)
+                count = count + 1
+                msg = ser.read(100)
+        except Exception as exc:
+            print(exc)
         # msg = ser.read(100)
         print(msg)
         return msg