updates

src/firmware/actions.ts

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-// Copyright (c) 2020-2025 The Pybricks Authors
+// Copyright (c) 2020-2026 The Pybricks Authors
 
 import { FirmwareReaderError, HubType } from '@pybricks/firmware';
 import { createAction } from '../actions';
@@ -139,15 +139,6 @@ export const didStart = createAction(() => ({
     type: 'flashFirmware.action.didStart',
 }));
 
-/**
- * Action that indicates current firmware flashing progress.
- * @param value The current progress (0 to 1).
- */
-export const didProgress = createAction((value: number) => {
-    // assert(value >= 0 && value <= 1, 'value out of range');
-    return { type: 'flashFirmware.action.didProgress', value };
-});
-
 /** Action that indicates that flashing firmware completed successfully. */
 export const didFinish = createAction(() => ({
     type: 'flashFirmware.action.didFinish',

src/firmware/alerts/UnsupportedDfuHub.tsx

@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2025-2026 The Pybricks Authors
+
+import { Intent } from '@blueprintjs/core';
+import { Error } from '@blueprintjs/icons';
+import React from 'react';
+import type { CreateToast } from '../../toasterTypes';
+import { useI18n } from './i18n';
+
+const UnsupportedDfuHub: React.FunctionComponent = () => {
+    const i18n = useI18n();
+    return (
+        <>
+            <p>{i18n.translate('unsupportedDfuHub.message')}</p>
+        </>
+    );
+};
+
+export const unsupportedDfuHub: CreateToast = (onAction) => ({
+    message: <UnsupportedDfuHub />,
+    icon: <Error />,
+    intent: Intent.DANGER,
+    onDismiss: () => onAction('dismiss'),
+});

src/firmware/alerts/index.ts

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-// Copyright (c) 2022-2025 The Pybricks Authors
+// Copyright (c) 2022-2026 The Pybricks Authors
 
 import { dfuError } from './DfuError';
 import { flashProgress } from './FlashProgress';
@@ -8,6 +8,7 @@ import { noDfuInterface } from './NoDfuInterface';
 import { noWebHid } from './NoWebHid';
 import { noWebUsb } from './NoWebUsb';
 import { releaseButton } from './ReleaseButton';
+import { unsupportedDfuHub } from './UnsupportedDfuHub';
 
 export default {
     dfuError,
@@ -17,4 +18,5 @@ export default {
     noWebHid,
     noWebUsb,
     releaseButton,
+    unsupportedDfuHub,
 };

src/firmware/alerts/translations/en.json

@@ -22,6 +22,9 @@
         "installUsbDriverButton": "Install USB Driver",
         "configureUdevRulesButton": "Configure udev rules"
     },
+    "unsupportedDfuHub": {
+        "message": "This hub has different internal electronics and requires a different firmware. Pybricks does not support this yet. We are working on it!"
+    },
     "noDfuInterface": {
         "message": "This is very unusual. The USB device did not contain the expected interface."
     },

src/firmware/reducers.test.ts

@@ -1,12 +1,11 @@
 // SPDX-License-Identifier: MIT
-// Copyright (c) 2021-2025 The Pybricks Authors
+// Copyright (c) 2021-2026 The Pybricks Authors
 
 import { AnyAction } from 'redux';
 import {
     FailToFinishReasonType,
     didFailToFinish,
     didFinish,
-    didProgress,
     didStart,
 } from './actions';
 import reducers from './reducers';
@@ -26,7 +25,6 @@ test('initial state', () => {
           "isFirmwareFlashEV3InProgress": false,
           "isFirmwareFlashUsbDfuInProgress": false,
           "isFirmwareRestoreOfficialDfuInProgress": false,
-          "progress": null,
           "restoreOfficialDialog": {
             "isOpen": false,
           },
@@ -44,8 +42,3 @@ test('flashing', () => {
         ).flashing,
     ).toBe(false);
 });
-
-test('progress', () => {
-    expect(reducers({ progress: 1 } as State, didStart()).progress).toBe(null);
-    expect(reducers({ progress: null } as State, didProgress(1)).progress).toBe(1);
-});

src/firmware/reducers.ts

@@ -1,11 +1,10 @@
 // SPDX-License-Identifier: MIT
-// Copyright (c) 2021-2025 The Pybricks Authors
+// Copyright (c) 2021-2026 The Pybricks Authors
 
 import { Reducer, combineReducers } from 'redux';
 import {
     didFailToFinish,
     didFinish,
-    didProgress,
     didStart,
     firmwareDidFailToFlashUsbDfu,
     firmwareDidFailToRestoreOfficialDfu,
@@ -33,18 +32,6 @@ const flashing: Reducer<boolean> = (state = false, action) => {
     return state;
 };
 
-const progress: Reducer<number | null> = (state = null, action) => {
-    if (didStart.matches(action)) {
-        return null;
-    }
-
-    if (didProgress.matches(action)) {
-        return action.value;
-    }
-
-    return state;
-};
-
 const isFirmwareFlashUsbDfuInProgress: Reducer<boolean> = (state = false, action) => {
     if (firmwareFlashUsbDfu.matches(action)) {
         return true;
@@ -100,7 +87,6 @@ export default combineReducers({
     installPybricksDialog,
     restoreOfficialDialog,
     flashing,
-    progress,
     isFirmwareFlashUsbDfuInProgress,
     isFirmwareRestoreOfficialDfuInProgress,
     isFirmwareFlashEV3InProgress,

src/firmware/sagas.test.ts

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-// Copyright (c) 2021-2024 The Pybricks Authors
+// Copyright (c) 2021-2026 The Pybricks Authors
 
 import {
     FirmwareMetadata,
@@ -43,7 +43,6 @@ import {
     MetadataProblem,
     didFailToFinish,
     didFinish,
-    didProgress,
     didStart,
     flashFirmware as flashFirmwareAction,
 } from './actions';
@@ -175,9 +174,6 @@ describe('flashFirmware', () => {
 
                 saga.put(didRequest(id));
 
-                action = await saga.take();
-                expect(action).toEqual(didProgress(offset / totalFirmwareSize));
-
                 action = await saga.take();
                 expect(action).toEqual(
                     alertsShowAlert(
@@ -213,9 +209,6 @@ describe('flashFirmware', () => {
 
             saga.put(programResponse(0x33, totalFirmwareSize));
 
-            action = await saga.take();
-            expect(action).toEqual(didProgress(1));
-
             action = await saga.take();
             expect(action).toEqual(
                 alertsShowAlert(
@@ -341,9 +334,6 @@ describe('flashFirmware', () => {
 
                 saga.put(didRequest(id));
 
-                action = await saga.take();
-                expect(action).toEqual(didProgress(offset / totalFirmwareSize));
-
                 action = await saga.take();
                 expect(action).toEqual(
                     alertsShowAlert(
@@ -379,9 +369,6 @@ describe('flashFirmware', () => {
 
             saga.put(programResponse(0xe0, totalFirmwareSize));
 
-            action = await saga.take();
-            expect(action).toEqual(didProgress(1));
-
             action = await saga.take();
             expect(action).toEqual(
                 alertsShowAlert(
@@ -1306,9 +1293,6 @@ describe('flashFirmware', () => {
 
                 saga.put(didRequest(id));
 
-                action = await saga.take();
-                expect(action).toEqual(didProgress(offset / totalFirmwareSize));
-
                 action = await saga.take();
                 expect(action).toEqual(
                     alertsShowAlert(
@@ -1482,9 +1466,6 @@ describe('flashFirmware', () => {
 
                 saga.put(didRequest(id));
 
-                action = await saga.take();
-                expect(action).toEqual(didProgress(offset / totalFirmwareSize));
-
                 action = await saga.take();
                 expect(action).toEqual(
                     alertsShowAlert(
@@ -1664,9 +1645,6 @@ describe('flashFirmware', () => {
 
                 saga.put(didRequest(id));
 
-                action = await saga.take();
-                expect(action).toEqual(didProgress(offset / totalFirmwareSize));
-
                 action = await saga.take();
                 expect(action).toEqual(
                     alertsShowAlert(
@@ -1702,9 +1680,6 @@ describe('flashFirmware', () => {
 
             saga.put(programResponse(0xf3, totalFirmwareSize));
 
-            action = await saga.take();
-            expect(action).toEqual(didProgress(1));
-
             action = await saga.take();
             expect(action).toEqual(
                 alertsShowAlert(
@@ -2230,9 +2205,6 @@ describe('flashFirmware', () => {
 
             saga.put(didRequest(id));
 
-            action = await saga.take();
-            expect(action).toEqual(didProgress(offset / totalFirmwareSize));
-
             action = await saga.take();
             expect(action).toEqual(
                 alertsShowAlert(
@@ -2267,9 +2239,6 @@ describe('flashFirmware', () => {
 
         saga.put(programResponse(0x27, totalFirmwareSize));
 
-        action = await saga.take();
-        expect(action).toEqual(didProgress(1));
-
         action = await saga.take();
         expect(action).toEqual(
             alertsShowAlert(

src/firmware/sagas.ts

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-// Copyright (c) 2020-2025 The Pybricks Authors
+// Copyright (c) 2020-2026 The Pybricks Authors
 
 import {
     FirmwareReader,
@@ -75,7 +75,6 @@ import {
     MetadataProblem,
     didFailToFinish,
     didFinish,
-    didProgress,
     didStart,
     firmwareDidFailToFlashEV3,
     firmwareDidFailToFlashUsbDfu,
@@ -531,8 +530,6 @@ function* handleFlashFirmware(action: ReturnType<typeof flashFirmware>): Generat
             );
             yield* waitForDidRequest(programAction.id);
 
-            yield* put(didProgress(offset / firmware.length));
-
             yield* put(
                 alertsShowAlert(
                     'firmware',
@@ -617,8 +614,6 @@ function* handleFlashFirmware(action: ReturnType<typeof flashFirmware>): Generat
             yield* disconnectAndCancel();
         }
 
-        yield* put(didProgress(1));
-
         yield* put(
             alertsShowAlert(
                 'firmware',
@@ -754,6 +749,15 @@ function* handleFlashUsbDfu(action: ReturnType<typeof firmwareFlashUsbDfu>): Gen
             return;
         }
 
+        if (
+            device.productId === LegoUsbProductId.SpikePrimeBootloader &&
+            device.deviceVersionMajor !== 1
+        ) {
+            yield* put(alertsShowAlert('firmware', 'unsupportedDfuHub'));
+            yield* put(firmwareDidFailToFlashUsbDfu());
+            return;
+        }
+
         const dfu = new WebDFU(
             device,
             // forceInterfacesName is needed to get the flash layout map
@@ -1033,6 +1037,7 @@ function* handleRestoreOfficialDfu(
     }
 }
 
+const firmwareEv3ProgressToastId = 'firmware.ev3.progress';
 const getNextEV3MessageId = createCountFunc();
 
 function* handleFlashEV3(action: ReturnType<typeof firmwareFlashEV3>): Generator {
@@ -1252,6 +1257,7 @@ function* handleFlashEV3(action: ReturnType<typeof firmwareFlashEV3>): Generator
                     error: eraseError,
                 }),
             );
+            yield* put(alertsHideAlert(firmwareEv3ProgressToastId));
             // FIXME: should have a better error reason
             yield* put(didFailToFinish(FailToFinishReasonType.Unknown, eraseError));
             yield* put(firmwareDidFailToFlashEV3());
@@ -1269,6 +1275,7 @@ function* handleFlashEV3(action: ReturnType<typeof firmwareFlashEV3>): Generator
                         error: sendError,
                     }),
                 );
+                yield* put(alertsHideAlert(firmwareEv3ProgressToastId));
                 // FIXME: should have a better error reason
                 yield* put(didFailToFinish(FailToFinishReasonType.Unknown, sendError));
                 yield* put(firmwareDidFailToFlashEV3());
@@ -1277,10 +1284,6 @@ function* handleFlashEV3(action: ReturnType<typeof firmwareFlashEV3>): Generator
             }
         }
 
-        yield* put(
-            didProgress((i + sectorData.byteLength) / action.firmware.byteLength),
-        );
-
         yield* put(
             alertsShowAlert(
                 'firmware',
@@ -1289,7 +1292,7 @@ function* handleFlashEV3(action: ReturnType<typeof firmwareFlashEV3>): Generator
                     action: 'flash',
                     progress: (i + sectorData.byteLength) / action.firmware.byteLength,
                 },
-                firmwareBleProgressToastId,
+                firmwareEv3ProgressToastId,
                 true,
             ),
         );
@@ -1303,7 +1306,7 @@ function* handleFlashEV3(action: ReturnType<typeof firmwareFlashEV3>): Generator
                 action: 'flash',
                 progress: 1,
             },
-            firmwareBleProgressToastId,
+            firmwareEv3ProgressToastId,
             true,
         ),
     );