diff --git a/app/controllers/readings_controller.rb b/app/controllers/readings_controller.rb
index 8231af7..8e1b877 100644
--- a/app/controllers/readings_controller.rb
+++ b/app/controllers/readings_controller.rb
@@ -50,16 +50,16 @@ class ReadingsController < ActionController::API
                                       :battery_status,
                                       :sample,
                                       :signature,
-                                      coordinates: %i[lat lng])
+                                      coordinates: %i[lat lng]).tap do |p|
+                                        p[:timestamp] = Time.at p[:timestamp]
+                                      rescue TypeError
+                                      end
   end
 
   # Procesa los parámetros de un sensor
   def sensor_params(sensor)
     sensor.permit(:timestamp, :type, :value, :unit, :error).tap do |p|
       p[:local_type] = p.delete :type
-      p[:timestamp] = Time.at p[:timestamp]
-    rescue TypeError
     end
   end
 end
-
diff --git a/app/models/sensor.rb b/app/models/sensor.rb
index 69b2bf8..edd6f11 100644
--- a/app/models/sensor.rb
+++ b/app/models/sensor.rb
@@ -3,5 +3,5 @@
 class Sensor < ApplicationRecord
   belongs_to :arduino
 
-  validates_presence_of :timestamp, :local_type, :value, :unit
+  validates_presence_of :local_type, :value, :unit
 end
diff --git a/db/migrate/20220309175041_remove_timestamp_from_sensor.rb b/db/migrate/20220309175041_remove_timestamp_from_sensor.rb
new file mode 100644
index 0000000..2904c30
--- /dev/null
+++ b/db/migrate/20220309175041_remove_timestamp_from_sensor.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class RemoveTimestampFromSensor < ActiveRecord::Migration[6.1]
+  def change
+    remove_column :sensors, :timestamp, :datetime
+  end
+end