diff --git a/services/device.service.js b/services/device.service.js
new file mode 100644
index 0000000..d4c8a44
--- /dev/null
+++ b/services/device.service.js
@@ -0,0 +1,81 @@
+const {
+  getAllDevicesDb,
+  getDeviceByIdDb,
+  getDeviceByCodeDb,
+  createDeviceDb,
+  updateDeviceDb,
+  softDeleteDeviceDb
+} = require('../db/device.db');
+const { ErrorHandler } = require('../helpers/error');
+
+class DeviceService {
+  // Get all devices
+  static async getAllDevices() {
+    const devices = await getAllDevicesDb();
+    return devices;
+  }
+
+  // Get device by ID
+  static async getDeviceById(id) {
+    const device = await getDeviceByIdDb(id);
+    if (!device) {
+      throw new ErrorHandler(404, 'Device not found');
+    }
+    return device;
+  }
+
+  // Get device by code
+  static async getDeviceByCode(code) {
+    const device = await getDeviceByCodeDb(code);
+    if (!device) {
+      throw new ErrorHandler(404, 'Device not found');
+    }
+    return device;
+  }
+
+  // Create device
+  static async createDevice(data, userId) {
+    if (!data || typeof data !== 'object') data = {};
+
+    data.created_by = userId;
+    data.is_active = 1;
+
+    // cek kode unik
+    const existingDevice = await getDeviceByCodeDb(data.device_code);
+    if (existingDevice) {
+      throw new ErrorHandler(400, 'Device code already exists');
+    }
+
+    const newDevice = await createDeviceDb(data);
+    return newDevice;
+  }
+
+  // Update device
+  static async updateDevice(id, data, userId) {
+    if (!data || typeof data !== 'object') data = {};
+
+    const existingDevice = await getDeviceByIdDb(id);
+    if (!existingDevice) {
+      throw new ErrorHandler(404, 'Device not found');
+    }
+
+    data.updated_by = userId;
+    data.updated_at = new Date();
+
+    await updateDeviceDb(id, data);
+    return { message: 'Device updated successfully' };
+  }
+
+  // Soft delete device
+  static async deleteDevice(id, userId) {
+    const existingDevice = await getDeviceByIdDb(id);
+    if (!existingDevice) {
+      throw new ErrorHandler(404, 'Device not found');
+    }
+
+    await softDeleteDeviceDb(id, userId);
+    return { message: 'Device deleted successfully' };
+  }
+}
+
+module.exports = DeviceService;