diff --git a/mycodo/functions/bang_bang.py b/mycodo/functions/bang_bang.py
index 373e1f77a..58d7d38f8 100644
--- a/mycodo/functions/bang_bang.py
+++ b/mycodo/functions/bang_bang.py
@@ -105,7 +105,6 @@ def __init__(self, function, testing=False):
         super().__init__(function, testing=testing, name=__name__)
 
         self.control_variable = None
-        self.timestamp = None
         self.control = DaemonControl()
         self.outputIsOn = False
         self.timer_loop = time.time()
@@ -132,8 +131,6 @@ def __init__(self, function, testing=False):
             self.try_initialize()
 
     def initialize(self):
-        self.timestamp = time.time()
-
         self.output_channel = self.get_output_channel_from_channel_id(
             self.output_channel_id)
 
diff --git a/mycodo/functions/bang_bang_on_off.py b/mycodo/functions/bang_bang_on_off.py
index d071cf59d..b2634bf8d 100644
--- a/mycodo/functions/bang_bang_on_off.py
+++ b/mycodo/functions/bang_bang_on_off.py
@@ -116,7 +116,6 @@ def __init__(self, function, testing=False):
         super().__init__(function, testing=testing, name=__name__)
 
         self.control_variable = None
-        self.timestamp = None
         self.control = DaemonControl()
         self.timer_loop = time.time()
 
@@ -146,8 +145,6 @@ def __init__(self, function, testing=False):
             self.try_initialize()
 
     def initialize(self):
-        self.timestamp = time.time()
-
         self.output_raise_channel = self.get_output_channel_from_channel_id(
             self.output_raise_channel_id)
         self.output_lower_channel = self.get_output_channel_from_channel_id(
diff --git a/mycodo/functions/bang_bang_pwm.py b/mycodo/functions/bang_bang_pwm.py
index 74312f04f..182e29d0f 100644
--- a/mycodo/functions/bang_bang_pwm.py
+++ b/mycodo/functions/bang_bang_pwm.py
@@ -135,7 +135,6 @@ def __init__(self, function, testing=False):
         super().__init__(function, testing=testing, name=__name__)
 
         self.control_variable = None
-        self.timestamp = None
         self.control = DaemonControl()
         self.outputIsOn = False
         self.timer_loop = time.time()
@@ -166,8 +165,6 @@ def __init__(self, function, testing=False):
             self.try_initialize()
 
     def initialize(self):
-        self.timestamp = time.time()
-
         self.output_channel = self.get_output_channel_from_channel_id(
             self.output_channel_id)