rechazar los sensores vacíos

puede pasar que los arduinos no respondan

app/controllers/readings_controller.rb

@@ -18,10 +18,12 @@ class ReadingsController < ActionController::API
       reading.raw_transaction = request.raw_post
       reading.verified = reading.verify_ssh_signature
 
-      params[:arduinos]&.each do |a|
+      params[:arduinos]&.reject do |a|
+        a[:id].blank? || a[:sensores].empty?
+      end&.each do |a|
         arduino = reading.arduinos.build local_id: a[:id], raspberry: raspberry
 
-        a[:sensores]&.each do |s|
+        a[:sensores].each do |s|
           arduino.sensors.build(sensor_params s)
         end
       end