diff --git a/src/main/java/com/ffii/fpsms/modules/jobOrder/service/PlasticBagPrinterService.kt b/src/main/java/com/ffii/fpsms/modules/jobOrder/service/PlasticBagPrinterService.kt
index e53ad3d..f0de9b9 100644
--- a/src/main/java/com/ffii/fpsms/modules/jobOrder/service/PlasticBagPrinterService.kt
+++ b/src/main/java/com/ffii/fpsms/modules/jobOrder/service/PlasticBagPrinterService.kt
@@ -1,8 +1,11 @@
 package com.ffii.fpsms.modules.jobOrder.service
 
+import com.ffii.core.support.JdbcDao
 import com.ffii.fpsms.modules.jobOrder.entity.JobOrderRepository
 import com.ffii.fpsms.modules.jobOrder.web.model.PrintRequest
 import com.ffii.fpsms.modules.jobOrder.web.model.LaserRequest
+import com.ffii.fpsms.modules.jobOrder.web.model.OnPackQrJobOrderRequest
+import com.ffii.fpsms.modules.stock.entity.StockInLineRepository
 import org.springframework.stereotype.Service
 import java.awt.Color
 import java.awt.Font
@@ -32,6 +35,8 @@ data class BitmapResult(val bytes: ByteArray, val width: Int)
 @Service
 open class PlasticBagPrinterService(
     val jobOrderRepository: JobOrderRepository,
+    private val jdbcDao: JdbcDao,
+    private val stockInLineRepository: StockInLineRepository,
 ) {
 
     fun generatePrintJobBundle(
@@ -142,6 +147,65 @@ open class PlasticBagPrinterService(
         return baos.toByteArray()
     }
 
+    fun generateOnPackQrZip(jobOrders: List<OnPackQrJobOrderRequest>): ByteArray {
+        val normalizedJobOrders = jobOrders
+            .map {
+                OnPackQrJobOrderRequest(
+                    jobOrderId = it.jobOrderId,
+                    itemCode = it.itemCode.trim(),
+                )
+            }
+            .filter { it.jobOrderId > 0 && it.itemCode.isNotBlank() }
+
+        require(normalizedJobOrders.isNotEmpty()) { "No job orders provided" }
+
+        val normalizedCodes = normalizedJobOrders
+            .map { it.itemCode }
+            .distinct()
+
+        val sql = """
+            select code, filename
+            from onpack_qr
+            where code in (:itemCodes)
+            order by code asc
+        """.trimIndent()
+
+        val rows = jdbcDao.queryForList(
+            sql,
+            mapOf("itemCodes" to normalizedCodes),
+        )
+
+        require(rows.isNotEmpty()) { "No OnPack QR records found for the selected date" }
+
+        val filenameByCode = rows.associate { row ->
+            row["code"]?.toString()?.trim().orEmpty() to row["filename"]?.toString()?.trim().orEmpty()
+        }
+
+        val baos = ByteArrayOutputStream()
+        ZipOutputStream(baos).use { zos ->
+            val addedEntries = linkedSetOf<String>()
+            normalizedJobOrders.forEach { jobOrder ->
+                val filename = filenameByCode[jobOrder.itemCode].orEmpty()
+                if (filename.isBlank()) return@forEach
+
+                val stockInLine = stockInLineRepository.findFirstByJobOrder_IdAndDeletedFalse(jobOrder.jobOrderId)
+                    ?: return@forEach
+                val itemId = stockInLine.item?.id ?: return@forEach
+                val stockInLineId = stockInLine.id ?: return@forEach
+
+                val qrContent = """{"itemId": $itemId, "stockInLineId": $stockInLineId}"""
+                val bmp = createQrCodeBitmap(qrContent, 600)
+                val zipEntryName = buildUniqueZipEntryName(filename, addedEntries)
+                if (!addedEntries.add(zipEntryName)) return@forEach
+                addToZip(zos, zipEntryName, bmp.bytes)
+            }
+
+            require(addedEntries.isNotEmpty()) { "No OnPack QR files could be generated for the selected date" }
+        }
+
+        return baos.toByteArray()
+    }
+
     private fun createMonochromeBitmap(text: String, targetHeight: Int): BitmapResult {
         // Step 1: Measure text width with temporary image
         val tempImg = BufferedImage(1, 1, BufferedImage.TYPE_BYTE_BINARY)
@@ -208,6 +272,73 @@ open class PlasticBagPrinterService(
         }
     }
 
+    fun checkPrinterConnection(
+        printerType: String,
+        printerIp: String?,
+        printerPort: Int?,
+        labelCom: String?,
+    ): Pair<Boolean, String> {
+        return when (printerType.lowercase()) {
+            "dataflex" -> checkTcpPrinter(printerIp, printerPort ?: 3008, "DataFlex")
+            "laser" -> checkTcpPrinter(printerIp, printerPort ?: 45678, "Laser")
+            "label" -> {
+                val comPort = labelCom?.trim().orEmpty()
+                if (comPort.isBlank()) {
+                    false to "Label printer COM port is not configured"
+                } else {
+                    checkSerialPrinter(comPort)
+                }
+            }
+            else -> false to "Unsupported printer type: $printerType"
+        }
+    }
+
+    private fun checkTcpPrinter(printerIp: String?, port: Int, printerName: String): Pair<Boolean, String> {
+        val ip = printerIp?.trim().orEmpty()
+        if (ip.isBlank()) {
+            return false to "$printerName IP is not configured"
+        }
+
+        return try {
+            Socket().use { socket ->
+                socket.connect(InetSocketAddress(ip, port), 3000)
+                true to "$printerName connected"
+            }
+        } catch (e: SocketTimeoutException) {
+            false to "$printerName connection timed out"
+        } catch (e: ConnectException) {
+            false to "$printerName connection refused"
+        } catch (e: Exception) {
+            false to "$printerName connection failed: ${e.message}"
+        }
+    }
+
+    private fun checkSerialPrinter(comPort: String): Pair<Boolean, String> {
+        val normalizedPort = comPort.trim().uppercase()
+        val osName = System.getProperty("os.name")?.lowercase().orEmpty()
+
+        if (!osName.contains("win")) {
+            return false to "Label printer COM check is only supported on Windows"
+        }
+
+        return try {
+            val process = ProcessBuilder("cmd", "/c", "mode", normalizedPort)
+                .redirectErrorStream(true)
+                .start()
+
+            val output = process.inputStream.bufferedReader().use { it.readText() }
+            val exitCode = process.waitFor()
+
+            if (exitCode == 0) {
+                true to "Label printer connected on $normalizedPort"
+            } else {
+                false to (output.trim().ifBlank { "Label printer $normalizedPort not available" })
+            }
+        } catch (e: Exception) {
+            false to "Label printer check failed: ${e.message}"
+        }
+    }
+
     private fun createQrCodeBitmap(content: String, contentSize: Int, totalSize: Int = contentSize + 80): BitmapResult {
         if (totalSize < contentSize) throw IllegalArgumentException("totalSize must be >= contentSize")
 
@@ -272,6 +403,34 @@ open class PlasticBagPrinterService(
         zos.closeEntry()
     }
 
+    private fun sanitizeFilePart(value: String): String {
+        return value.replace(Regex("""[\\/:*?"<>|]"""), "_")
+    }
+
+    private fun buildUniqueZipEntryName(filename: String, existingEntries: Set<String>): String {
+        val sanitized = sanitizeFilePart(filename)
+        if (sanitized.isBlank()) {
+            return buildUniqueZipEntryName("qr.bmp", existingEntries)
+        }
+
+        if (!existingEntries.contains(sanitized)) {
+            return sanitized
+        }
+
+        val dotIndex = sanitized.lastIndexOf('.')
+        val baseName = if (dotIndex > 0) sanitized.substring(0, dotIndex) else sanitized
+        val extension = if (dotIndex > 0) sanitized.substring(dotIndex) else ""
+
+        var counter = 2
+        while (true) {
+            val candidate = "${baseName}_${counter}${extension}"
+            if (!existingEntries.contains(candidate)) {
+                return candidate
+            }
+            counter++
+        }
+    }
+
     // ────────────────────────────────────────────────
     // The rest of your printer communication methods remain unchanged
     // ────────────────────────────────────────────────
diff --git a/src/main/java/com/ffii/fpsms/modules/jobOrder/web/PlasticBagPrinterController.kt b/src/main/java/com/ffii/fpsms/modules/jobOrder/web/PlasticBagPrinterController.kt
index 1c15144..80c49e8 100644
--- a/src/main/java/com/ffii/fpsms/modules/jobOrder/web/PlasticBagPrinterController.kt
+++ b/src/main/java/com/ffii/fpsms/modules/jobOrder/web/PlasticBagPrinterController.kt
@@ -4,6 +4,9 @@ import com.ffii.fpsms.modules.jobOrder.service.PlasticBagPrinterService
 import com.ffii.fpsms.modules.jobOrder.web.model.PrintRequest
 import com.ffii.fpsms.modules.jobOrder.web.model.LaserRequest
 import com.ffii.fpsms.modules.jobOrder.web.model.Laser2Request
+import com.ffii.fpsms.modules.jobOrder.web.model.OnPackQrDownloadRequest
+import com.ffii.fpsms.modules.jobOrder.web.model.PrinterStatusRequest
+import com.ffii.fpsms.modules.jobOrder.web.model.PrinterStatusResponse
 import jakarta.servlet.http.HttpServletResponse
 import org.springframework.http.HttpHeaders
 import org.springframework.web.bind.annotation.*
@@ -16,6 +19,50 @@ class PlasticBagPrinterController(
     private val plasticBagPrinterService: PlasticBagPrinterService,
 ) {
 
+    @PostMapping("/check-printer")
+    fun checkPrinter(@RequestBody request: PrinterStatusRequest): ResponseEntity<PrinterStatusResponse> {
+        val (connected, message) = plasticBagPrinterService.checkPrinterConnection(
+            printerType = request.printerType,
+            printerIp = request.printerIp,
+            printerPort = request.printerPort,
+            labelCom = request.labelCom,
+        )
+
+        val body = PrinterStatusResponse(
+            connected = connected,
+            message = message,
+        )
+
+        return if (connected) {
+            ResponseEntity.ok(body)
+        } else {
+            ResponseEntity.status(503).body(body)
+        }
+    }
+
+    @PostMapping("/download-onpack-qr")
+    fun downloadOnPackQr(
+        @RequestBody request: OnPackQrDownloadRequest,
+        response: HttpServletResponse,
+    ) {
+        try {
+            val zipBytes = plasticBagPrinterService.generateOnPackQrZip(request.jobOrders)
+            response.contentType = "application/zip"
+            response.setHeader(
+                HttpHeaders.CONTENT_DISPOSITION,
+                "attachment; filename=\"onpack_qr_codes.zip\""
+            )
+            response.setContentLength(zipBytes.size)
+            response.outputStream.write(zipBytes)
+            response.outputStream.flush()
+        } catch (e: IllegalArgumentException) {
+            response.status = HttpServletResponse.SC_BAD_REQUEST
+            response.contentType = "text/plain;charset=UTF-8"
+            response.writer.write(e.message ?: "Invalid request")
+            response.writer.flush()
+        }
+    }
+
     /**
      * Test API to generate and download the printer job files as a ZIP.
      * ONPACK2030
diff --git a/src/main/java/com/ffii/fpsms/modules/jobOrder/web/model/PlasticPrintRequest.kt b/src/main/java/com/ffii/fpsms/modules/jobOrder/web/model/PlasticPrintRequest.kt
index d701116..2bc2940 100644
--- a/src/main/java/com/ffii/fpsms/modules/jobOrder/web/model/PlasticPrintRequest.kt
+++ b/src/main/java/com/ffii/fpsms/modules/jobOrder/web/model/PlasticPrintRequest.kt
@@ -31,4 +31,25 @@ data class Laser2Request(
     val textChannel4: String? = null,
     val text3ObjectName: String? = "Text3",
     val text4ObjectName: String? = "Text4"
+)
+
+data class PrinterStatusRequest(
+    val printerType: String,
+    val printerIp: String? = null,
+    val printerPort: Int? = null,
+    val labelCom: String? = null,
+)
+
+data class PrinterStatusResponse(
+    val connected: Boolean,
+    val message: String,
+)
+
+data class OnPackQrDownloadRequest(
+    val jobOrders: List<OnPackQrJobOrderRequest>,
+)
+
+data class OnPackQrJobOrderRequest(
+    val jobOrderId: Long,
+    val itemCode: String,
 )
\ No newline at end of file
diff --git a/src/main/resources/db/changelog/changes/20260310_fai/01_onpack.sql b/src/main/resources/db/changelog/changes/20260310_fai/01_onpack.sql
new file mode 100644
index 0000000..7e6bbeb
--- /dev/null
+++ b/src/main/resources/db/changelog/changes/20260310_fai/01_onpack.sql
@@ -0,0 +1,10 @@
+--liquibase formatted sql
+--changeset fai:onpack_qr
+
+CREATE TABLE `onpack_qr` (
+  `code` varchar(100) NOT NULL,
+  `filename` varchar(200) NOT NULL,
+  PRIMARY KEY (`code`,`filename`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
+INSERT INTO `onpack_qr` VALUES ('PP1074','7ca95d6d3bac41260fd574ef1f3bdeee.bmp'),('PP1082','0f18c99102e492558b58881b6b870bff.bmp'),('PP1137','d52f73249ac72b3e98cc53690d9f32a9.bmp'),('PP1144','0f4099201cb4a745d7cd4060b265b319.bmp'),('PP1152','9a67037ccb6424b1f03074cf4d481756.bmp'),('PP1156','729613796bffee0191efa65cdb1ac56a.bmp'),('PP1178','d01a522c4b1469bb4208f8341253a29d.bmp'),('PP1181','6486634fee7e1115dceb242881598c84.bmp'),('PP1185','4759a46839b9c83b759c443c346b2925.bmp'),('PP1185','c8ad8bf83d9b34fd75dadc0a380920bc.bmp'),('PP1213','5efebf816c4a7900e9958a8f770b5df1.bmp'),('PP1214','b31bc80a6b29a4886afae778c69cf8f6.bmp'),('PP1216','9f51ebf7d98f4b1235d5be8a2e107f20.bmp'),('PP1217','55cb367a93c36a4658a031ef6d90a043.bmp'),('PP1234','264471bab05dd256ff27cde6dc9fc673.bmp'),('PP2214','d401cf78e5cc3a1d592571ceb42da22a.bmp'),('PP2215','d8dc55bf3e2bf26aa121caebbdde8c2d.bmp'),('PP2243','0cea359e7334fd827579af62b7141552.bmp'),('PP2331','d532731e132cb2207cd67ef2944b4001.bmp');