diff --git a/rtu/device/base_device.hpp b/rtu/device/base_device.hpp
new file mode 100644
index 0000000..a64d708
--- /dev/null
+++ b/rtu/device/base_device.hpp
@@ -0,0 +1,40 @@
+#pragma once
+
+#include "base_config.hpp"
+#include "modbus/modbus.hpp"
+#include "port/base_port.hpp"
+
+#include <sdbusplus/async.hpp>
+#include <xyz/openbmc_project/Sensor/Value/aserver.hpp>
+
+namespace phosphor::modbus::rtu::device
+{
+
+class Device;
+
+using SensorValueIntf =
+    sdbusplus::aserver::xyz::openbmc_project::sensor::Value<Device>;
+using PortIntf = phosphor::modbus::rtu::port::BasePort;
+
+class BaseDevice
+{
+  public:
+    BaseDevice() = delete;
+
+    explicit BaseDevice(sdbusplus::async::context& ctx,
+                        const config::Config& config, PortIntf& serialPort);
+
+    auto readSensorRegisters() -> sdbusplus::async::task<void>;
+
+  private:
+    auto createSensors() -> void;
+
+    using sensors_map_t =
+        std::unordered_map<std::string, std::unique_ptr<SensorValueIntf>>;
+    sdbusplus::async::context& ctx;
+    const config::Config config;
+    PortIntf& serialPort;
+    sensors_map_t sensors;
+};
+
+} // namespace phosphor::modbus::rtu::device