diff --git a/app/controllers/readings_controller.rb b/app/controllers/readings_controller.rb
index 0752949..a9aa8be 100644
--- a/app/controllers/readings_controller.rb
+++ b/app/controllers/readings_controller.rb
@@ -14,7 +14,6 @@ class ReadingsController < ActionController::API
     Reading.transaction do
       reading = raspberry.readings.build reading_params
       reading.id = params[:transaction_uuid]
-      # TODO: Verificar firma
       reading.signature = request.headers[:'X-Signature']
 
       params[:arduinos]&.each do |a|
@@ -31,6 +30,8 @@ class ReadingsController < ActionController::API
         head :bad_request
       end
     end
+  rescue ActiveRecord::RecordNotUnique
+    render plain: params[:transaction_uuid], status: :ok
   end
 
   private