import fs module and update OTA check logic to compare version numbers correctly

src/routes/sensorbox.ts

@@ -11,6 +11,7 @@ import {
   saveDevice,
 } from "../data";
 import { generateDeviceToken, sensorboxAuth, verifyDeviceToken } from "../auth";
+import fs from "fs";
 
 const router = express.Router();
 
@@ -119,15 +120,13 @@ router.get("/ota/check", sensorboxAuth, (req, res) => {
   saveDevice(device);
 
   const update = findLatestReleaseDb(device.type, group, hardwareVersion);
-  if (!update || update.version === softwareVersion) {
+  if (!update || update.version <= softwareVersion) {
     res.sendStatus(204);
     return;
   }
 
   const link = createDownloadLinkDb(device.id, update.id);
   const downloadUrl = `${config.baseUrl}/download/${link.id}`;
-  // Get size of the update file to include in the response header
-  const fs = require("fs");
   let fileSize = 0;
   try {
     const stats = fs.statSync(update.filePath);