diff --git a/app/services/modbus/polling_service.rb b/app/services/modbus/polling_service.rb
index a8e5be8..b981e70 100644
--- a/app/services/modbus/polling_service.rb
+++ b/app/services/modbus/polling_service.rb
@@ -37,6 +37,7 @@ module Modbus
       def apply_schedule(schedule)
         if schedule.is_active
           run_script("on_off.rb", "0", "[Schedule] ON")
+          sleep 2
           run_script(
             "serial.rb",
             (schedule.temperature * 10).to_i.to_s,