diff --git a/rtu/firmware/device_firmware.hpp b/rtu/firmware/device_firmware.hpp
new file mode 100644
index 0000000..c3839f4
--- /dev/null
+++ b/rtu/firmware/device_firmware.hpp
@@ -0,0 +1,55 @@
+#pragma once
+
+#include "device/base_config.hpp"
+#include "port/base_port.hpp"
+
+#include <sdbusplus/async.hpp>
+#include <sdbusplus/async/server.hpp>
+#include <xyz/openbmc_project/Association/Definitions/aserver.hpp>
+#include <xyz/openbmc_project/Software/Activation/aserver.hpp>
+#include <xyz/openbmc_project/Software/Version/aserver.hpp>
+
+namespace phosphor::modbus::rtu::device
+{
+
+namespace config
+{
+
+struct Config;
+
+} // namespace config
+
+namespace config_intf = phosphor::modbus::rtu::device::config;
+using PortIntf = phosphor::modbus::rtu::port::BasePort;
+
+class DeviceFirmware;
+
+using FirmwareIntf = sdbusplus::async::server_t<
+    DeviceFirmware, sdbusplus::aserver::xyz::openbmc_project::software::Version,
+    sdbusplus::aserver::xyz::openbmc_project::software::Activation,
+    sdbusplus::aserver::xyz::openbmc_project::association::Definitions>;
+
+class DeviceFirmware
+{
+  public:
+    DeviceFirmware() = delete;
+
+    explicit DeviceFirmware(sdbusplus::async::context& ctx,
+                            const config_intf::Config& config,
+                            PortIntf& serialPort);
+
+    auto readVersionRegister() -> sdbusplus::async::task<void>;
+
+  protected:
+    // Object path of current firmware object
+    // TODO: check if its possible to get rid off this via mocking since its
+    // only used in tests
+    const sdbusplus::message::object_path objectPath;
+
+  private:
+    std::unique_ptr<FirmwareIntf> currentFirmware;
+    const config_intf::Config config;
+    PortIntf& serialPort;
+};
+
+} // namespace phosphor::modbus::rtu::device