diff --git a/public/mcm-81339-v0-28-0.bin b/public/mcm-81339-v0-28-0.bin
deleted file mode 100644
index 4b2793a..0000000
--- a/public/mcm-81339-v0-28-0.bin
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:c652ec7f96135755ed6011d4399a6afaa6aa9d1ac45d959d0732895550fbf8a1
-size 1742544
diff --git a/public/mcm-81339-v0-29-0.bin b/public/mcm-81339-v0-29-0.bin
new file mode 100644
index 0000000..10e93fd
--- /dev/null
+++ b/public/mcm-81339-v0-29-0.bin
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:be7e1d5c74df7f0fdeeffb44c14edc3247a367f7ec95806e6f1151efb9834320
+size 1780768
diff --git a/public/mcm-81349-v0-28-0.bin b/public/mcm-81349-v0-28-0.bin
deleted file mode 100644
index ca76ba0..0000000
--- a/public/mcm-81349-v0-28-0.bin
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:6bb45a666c91ff3b02b0ae257978a3714ce08eb41d23dbaf084afaa5897b2d3c
-size 1742608
diff --git a/public/mcm-81349-v0-29-0.bin b/public/mcm-81349-v0-29-0.bin
new file mode 100644
index 0000000..abed4ef
--- /dev/null
+++ b/public/mcm-81349-v0-29-0.bin
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4ba65115e4ad45f42b66d19b5d318e0346e7791837b38f696354bb459025c2de
+size 1780832
diff --git a/src/js/usbMcmLin.js b/src/js/usbMcmLin.js
index b487a54..0477b73 100644
--- a/src/js/usbMcmLin.js
+++ b/src/js/usbMcmLin.js
@@ -1,9 +1,11 @@
 import { McmGeneric } from './usbMcmGeneric';
 import { convertUint16ToUint8Array, convertUint32ToUint8Array, MasterMode, mcmMlxMessageId, mcmVendorRequest } from './usbTransport';
 
-const MEMORY_FLASH = 1;
-const MEMORY_NVRAM = 0;
-
+const BTL_MEMORY = {
+  nvram: 0,
+  flash: 1,
+  flash_cs: 2,
+};
 const OPP_PROGRAM = 0;
 const OPP_VERIFY = 1;
 
@@ -37,6 +39,11 @@ export class McmLin extends McmGeneric {
       await this.disableLinMode();
     }
 
+    const memType = BTL_MEMORY[memory.toLowerCase()];
+    if (memType === undefined) {
+      throw new Error(`Unknown memory type: "${memory}". Valid types: ${Object.keys(BTL_MEMORY).join(', ')}`);
+    }
+
     // transfer hex file
     await this.transport.doHexfileTransfer(hexfile);
 
@@ -44,7 +51,7 @@ export class McmLin extends McmGeneric {
     payload.set(convertUint32ToUint8Array(bitRate), 0); // baudrate to be used during bootloader operations
     payload[4] = manualPower ? 1 : 0; // 1: manual power cycling
     payload[5] = broadcast ? 1 : 0; // 1: bootloading shall be done in broadcast mode
-    payload[6] = memory.toLowerCase() === 'flash' ? MEMORY_FLASH : MEMORY_NVRAM; // memory type to perform action on (0: NVRAM; 1: flash)
+    payload[6] = memType; // memory type to perform action on (0: NVRAM; 1: flash; 2=flash_cs)
     payload[7] = operation.toLowerCase() === 'program' ? OPP_PROGRAM : OPP_VERIFY; // action type to perform (0: program; 1: verify)
 
     try {
diff --git a/src/views/pwm/PwmController.vue b/src/views/pwm/PwmController.vue
index 17e3648..75c0d13 100644
--- a/src/views/pwm/PwmController.vue
+++ b/src/views/pwm/PwmController.vue
@@ -11,6 +11,8 @@ const mcm = new McmPwm(transport);
 
 const errorMsg = ref('');
 const isErrorMsg = ref(false);
+let errorCount = 0;
+const ERROR_DISPLAY_POLLS = 10; /* 10 × 250 ms = 2.5 s */
 
 const pwmFrequency = ref(1000);
 const pwmDutyCycle = ref(0);
@@ -34,6 +36,7 @@ onMounted(async () => {
   } catch (error) {
     isErrorMsg.value = true;
     errorMsg.value = error.message;
+    errorCount = ERROR_DISPLAY_POLLS;
   }
 });
 
@@ -51,6 +54,7 @@ async function updateDutyCycle () {
   } catch (error) {
     isErrorMsg.value = true;
     errorMsg.value = error.message;
+    errorCount = ERROR_DISPLAY_POLLS;
   }
 }
 
@@ -60,6 +64,7 @@ async function updateFrequency () {
   } catch (error) {
     isErrorMsg.value = true;
     errorMsg.value = error.message;
+    errorCount = ERROR_DISPLAY_POLLS;
   }
 }
 
@@ -82,6 +87,14 @@ async function updateStatus () {
   } catch {
     /* silent polling error (optional) */
   }
+
+  if (errorCount > 0) {
+    errorCount -= 1;
+    if (errorCount === 0) {
+      isErrorMsg.value = false;
+      errorMsg.value = '';
+    }
+  }
 }
 </script>
 
@@ -163,12 +176,6 @@ async function updateStatus () {
               Live Status
             </h5>
 
-            <StatusMessage
-              :is-error="isErrorMsg"
-              :message="errorMsg"
-              class="mb-3"
-            />
-
             <div class="status-grid">
               <div class="status-label">
                 PWM Frequency
@@ -191,6 +198,12 @@ async function updateStatus () {
                 {{ pwmStatFgFrequency ?? '--' }} Hz
               </div>
             </div>
+
+            <StatusMessage
+              :is-error="isErrorMsg"
+              :message="errorMsg"
+              class="mb-3"
+            />
           </div>
         </div>
       </div>
diff --git a/src/views/system/SystemUpgrade.vue b/src/views/system/SystemUpgrade.vue
index 5fad69f..488e0f9 100644
--- a/src/views/system/SystemUpgrade.vue
+++ b/src/views/system/SystemUpgrade.vue
@@ -23,8 +23,8 @@ const firmwareBaseNames = {
   'Melexis Compact Master LIN': 'mcm-lin',
 };
 const firmwareLatestRev = {
-  'mcm-81339': 'v0.28.0',
-  'mcm-81349': 'v0.28.0',
+  'mcm-81339': 'v0.29.0',
+  'mcm-81349': 'v0.29.0',
   'mcm-lin': 'v0.4.0',
 };
 let firmwareBaseName = '';