diff --git a/tc420/__main__.py b/tc420/__main__.py
index abb9e62..9c7a1aa 100644
--- a/tc420/__main__.py
+++ b/tc420/__main__.py
@@ -19,6 +19,7 @@
 from random import random, randint
 from datetime import datetime
 from typing import Callable, Tuple
+from time import sleep
 
 import click
 import usb.core
@@ -290,6 +291,7 @@ def finalize(ctx: Context, _):
     Finalize command chain
     """
     if ctx.obj.mode_stop_neded:
+        sleep(0.01)
         # Close mode commands
         print("Finalizing modes...", end=" ", flush=True)
         check_result(ctx.obj.dev.mode_stop())
diff --git a/tc420/tc420.py b/tc420/tc420.py
index 9207d78..8deda04 100644
--- a/tc420/tc420.py
+++ b/tc420/tc420.py
@@ -19,6 +19,7 @@
 from datetime import datetime, time
 from struct import pack, unpack
 from time import time as timestamp
+from time import sleep
 import sys
 
 from threading import Thread
@@ -327,6 +328,9 @@ def send(self, packet: TC420Packet, check=True) -> bool:
             # It seems in case of error they just repeat the sent package from pos 2.
             res = res_pkt.data_len == 1 and res_pkt.data == self.OK
 
+        # give time for processing even though it returned success, issue #9
+        sleep(0.01)
+
         return res
 
     def time_sync(self, date: datetime = None) -> bool: