diff --git a/app.js b/app.js
index 29ac577..e69433c 100644
--- a/app.js
+++ b/app.js
@@ -1,3 +1,5 @@
+//app.js
+
 require("dotenv").config({ path: ".env" })
 require("events").EventEmitter.prototype._maxListeners = 30
 const morgan = require("morgan")
@@ -14,6 +16,7 @@ const LibMail = require("./library/LibMail")
 const LibHelper = require("./library/LibHelper")
 const nanoid = require("nanoid").nanoid
 const LibWinston = require("./library/LibWinston")
+const cron = require("node-cron")
 
 const express = require("express")
 // const routes = require("./routes/routes")
@@ -288,6 +291,102 @@ async function commitMessage(now, logDevice) {
 	}
 }
 
+async function checkMaintenanceMileage(vhc) {
+	try {
+		if (!vhc || !vhc.id) return false
+
+		const lastHistory = await db.query(
+			`SELECT odometer FROM t_vehicles_maintenance_history 
+			 WHERE vhc_id = ? AND isdeleted = 0 
+			 ORDER BY id DESC LIMIT 1`,
+			[vhc.id],
+		)
+
+		if (!lastHistory?.length) return false
+
+		const lastOdometer = Number(lastHistory[0].odometer || 0)
+		const currentMileage = Number(vhc.sum_milleage || 0)
+		const diff = currentMileage - lastOdometer
+
+		const thresholds = [5000, 10000, 150000]
+		if (!thresholds.includes(diff)) return false
+
+		await db.query(
+			`INSERT INTO t_vehicles_maintenance_history SET vhc_id = ?, odometer = ?`,
+			[vhc.id, currentMileage],
+		)
+
+		const users = await db.query(
+			`SELECT phone FROM t_users WHERE status_sms = 1 AND FIND_IN_SET(?, vhc) > 0`,
+			[vhc.id],
+		)
+		if (!users?.length) return false
+
+		const nopol = (vhc.nopol1 ?? "") + (vhc.nopol2 ?? "") + (vhc.nopol3 ?? "")
+
+		const rawMsg = `${nopol} | MAINTENANCE | ${diff} km sejak maintenance terakhir`.substring(0, 150).trim()
+		const countryCode = process.env.SMS_COUNTRY_CODE ?? "670"
+		const smsHost = process.env.SMS_HOST ?? "http://192.168.40.2:8181/submitsm/ka"
+
+		await Promise.allSettled(
+			users
+				.filter((u) => u.phone)
+				.map(async (user) => {
+					try {
+						await axios.get(`${smsHost}`, {
+							params: { to: `${countryCode}${user.phone}`, msg: rawMsg, sender: "Maintenance FROTA" },
+						})
+					} catch (smsErr) {
+						console.error("Error sending SMS:", smsErr.response ? JSON.stringify(smsErr.response.data) : smsErr.message)
+					}
+
+					try {
+						await db.query(`INSERT INTO sms_notif SET to_no = ?, message = ?`, [user.phone, rawMsg])
+					} catch (dbErr) {
+						console.error("Error logging SMS to DB:", dbErr.message)
+					}
+				}),
+		)
+	} catch (e) {
+		console.error("Error checkMaintenanceMileage:", e)
+	}
+}
+
+async function checkMaintenanceMileageScheduler() {
+	console.log("Maintenance mileage check job executed:", moment().format("YYYY-MM-DD HH:mm:ss"))
+	try {
+		console.time("Maintenance mileage check")
+
+		// ambil semua vehicle aktif beserta mileage & nopol
+		// vhc.id di sini didapat dari kolom `id` tabel t_vehicles, BUKAN dari device
+		const vehicles = await db.query(
+			`SELECT id, nopol1, nopol2, nopol3, sum_milleage 
+			 FROM t_vehicles 
+			 WHERE dlt IS NULL`,
+			[],
+		)
+
+		if (!vehicles?.length) {
+			console.log("No active vehicles found.")
+			console.timeEnd("Maintenance mileage check")
+			return
+		}
+
+		for (const vhc of vehicles) {
+			try {
+				await checkMaintenanceMileage(vhc)
+			} catch (err) {
+				console.error(`Error checking maintenance for vhc_id ${vhc.id}:`, err.message)
+			}
+		}
+
+		console.timeEnd("Maintenance mileage check")
+	} catch (error) {
+		console.error("Error in checkMaintenanceMileageScheduler:", error.message)
+	}
+	console.log("Maintenance mileage check job completed.")
+}
+
 const devices = []
 const netConn = require("./config/netConn")
 /**
@@ -519,8 +618,8 @@ net.createServer(
 
 			commitMessage(now, logDevice)
 		})
-		c.on("end", () => {})
-		c.on("close", () => {})
+		c.on("end", () => { })
+		c.on("close", () => { })
 
 		c.on("drain", (a) => {
 			console.log("client drain", a)
@@ -643,3 +742,4 @@ udp.on("listening", () => {
 })
 
 udp.bind(process.env.PORT_UDP)
+cron.schedule("0 * * * *", () => { checkMaintenanceMileageScheduler() })