diff --git a/app/models/controller.rb b/app/models/controller.rb
new file mode 100644
index 0000000..654345f
--- /dev/null
+++ b/app/models/controller.rb
@@ -0,0 +1,2 @@
+class Controller < ApplicationRecord
+end
diff --git a/db/migrate/20250423005211_create_controllers.rb b/db/migrate/20250423005211_create_controllers.rb
new file mode 100644
index 0000000..c9909e1
--- /dev/null
+++ b/db/migrate/20250423005211_create_controllers.rb
@@ -0,0 +1,7 @@
+class CreateControllers < ActiveRecord::Migration[8.0]
+  def change
+    create_table :controllers do |t|
+      t.timestamps
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index cab8406..0f651a4 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,14 +10,5 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2025_04_16_131440) do
-  create_table "schedules", force: :cascade do |t|
-    t.integer "hour"
-    t.integer "minute"
-    t.boolean "is_active"
-    t.float "temperature"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.index ["hour", "minute"], name: "index_schedules_on_hour_and_minute", unique: true
-  end
+ActiveRecord::Schema[8.0].define(version: 0) do
 end
diff --git a/test.rb b/test.rb
new file mode 100644
index 0000000..5ea916a
--- /dev/null
+++ b/test.rb
@@ -0,0 +1,12 @@
+require "rmodbus"
+require "ccutrer-serialport"
+
+value = ARGV[0]&.to_i
+
+ModBus::RTUClient.new("/dev/ttyUSB0", 9600) do |cl|
+  cl.with_slave(7) do |slave|
+    regs = slave.holding_registers
+    regs[2] = value
+    sleep 0.1
+  end
+end
diff --git a/test/fixtures/controllers.yml b/test/fixtures/controllers.yml
new file mode 100644
index 0000000..d7a3329
--- /dev/null
+++ b/test/fixtures/controllers.yml
@@ -0,0 +1,11 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+# This model initially had no columns defined. If you add columns to the
+# model remove the "{}" from the fixture names and add the columns immediately
+# below each fixture, per the syntax in the comments below
+#
+one: {}
+# column: value
+#
+two: {}
+# column: value
diff --git a/test/models/controller_test.rb b/test/models/controller_test.rb
new file mode 100644
index 0000000..c355ca7
--- /dev/null
+++ b/test/models/controller_test.rb
@@ -0,0 +1,7 @@
+require "test_helper"
+
+class ControllerTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end