Tool/firmware tester

tools/calibrator/index.html

@@ -169,8 +169,11 @@ <h4 class="font-semibold text-gray-900 mb-4">Serial connection</h4>
                                     <span class="status-dot disconnected" id="serialStatus"></span>
                                     <span class="ml-2 text-sm" id="serialStatusText">Not connected</span>
                                 </div>
-                                <button id="connectBtn"
-                                    class="btn-primary px-4 py-2 rounded-lg text-sm font-medium">Connect</button>
+                                <div class="flex items-center gap-3">
+                                    <span id="baudSelector"></span>
+                                    <button id="connectBtn"
+                                        class="btn-primary px-4 py-2 rounded-lg text-sm font-medium">Connect</button>
+                                </div>
                             </div>
                             <p class="text-xs text-gray-500">
                                 Click Connect and select your printer's serial port (usually contains "USB" or "CH340").
@@ -832,6 +835,7 @@ <h4 class="font-semibold text-blue-600 mb-2">Z error</h4>
     <script src="../shared/file-downloader.js"></script>
     <script src="../shared/wizard-framework.js"></script>
     <script src="../shared/printer-interface.js"></script>
+    <script src="../shared/baud-selector.js"></script>
     <script src="../shared/camera-manager.js"></script>
     <script src="../shared/inverse-kinematics.js"></script>
     <script src="../shared/calibration-corrector.js"></script>
@@ -849,6 +853,7 @@ <h4 class="font-semibold text-blue-600 mb-2">Z error</h4>
     <script src="js/calibration.js"></script>
     <script src="js/results.js"></script>
     <script src="js/app.js"></script>
+    <script>BaudSelector.mount('baudSelector');</script>
 </body>
 
 </html>

tools/firmware-builder/js/app.js

@@ -895,6 +895,14 @@ function exportConfig(showToastNotification = true) {
     // Download as JSON using shared utility
     downloadJSON(exportData, filename);
 
+    // Also stash the config in localStorage so the Firmware Tester can pick it up
+    // automatically, without forcing the user to re-upload the file.
+    try {
+        localStorage.setItem('rep5x_firmware_builder_config', JSON.stringify(exportData));
+    } catch (e) {
+        console.warn('Could not save firmware config to localStorage:', e);
+    }
+
     // Show feedback toast
     if (showToastNotification) {
         showToast('Configuration saved', 'save');

tools/firmware-tester/README.md

@@ -0,0 +1,47 @@
+# Firmware Tester
+
+Browser-based tool that verifies a freshly flashed Rep5x Marlin firmware against the hardware it's running on, and produces a corrected Firmware Builder JSON config if anything is wired backwards.
+
+## What it checks
+
+1. **Diagnostics**: `M115` (firmware ID), `M122` (TMC driver UART), `M119` (no endstop currently triggered), `M105` (thermistors read room temperature).
+2. **Endstop walk-through**: for each endstop (X, Y, Z, B microswitch, C optical sensor), the user is prompted to manually trigger it; the tool polls `M119` until the state flips.
+3. **Stepper directions**: sends a small relative move on each axis (X/Y/Z/C/B) and asks the user whether it moved as expected.
+4. **Homing direction**: for axes whose endstops passed, sends `G28 X` etc. and asks whether the carriage moved *toward* the endstop.
+5. **Extruder**: direction test, plus optional E-steps calibration via "extrude 100 mm, measure how much actually came out".
+
+## Output
+
+If a Firmware Builder JSON config was uploaded at the start, the tester produces a `*-corrected.json` with the discovered fixes applied:
+
+- Stepper direction reversed → `invert<axis>` flipped
+- Homing direction reversed → `<axis>HomeDir` sign flipped
+- Extruder reversed → `invertE` flipped
+- E-steps calibrated → `stepsE` updated
+
+Re-import the corrected JSON into the Firmware Builder, regenerate, re-flash, and run the tester again to confirm.
+
+## Where it sits in the workflow
+
+1. **Firmware Builder** → configure → download `firmware.bin` (and the JSON config alongside)
+2. **Firmware Tester** ← *(this tool)*: verify the flash worked, fix any reversals
+3. **Printer Setup** → kinematic calibration
+
+## Files
+
+- `index.html`: wizard skeleton (7 steps, Tailwind-based)
+- `js/app.js`: entry point, wizard init, results aggregation
+- `js/connect.js`: connection step (uses `StepConnectBase` from shared/)
+- `js/diagnostics.js`: M115 / M122 / M119 / M105 checks
+- `js/endstop-test.js`: manual endstop trigger walk-through
+- `js/stepper-test.js`: stepper direction prompts
+- `js/homing-test.js`: homing direction config-vs-physical-side check (no motor moves)
+- `js/extruder-test.js`: extruder direction + optional E-steps calibration
+- `js/results.js`: summary view + corrected JSON output
+- `styles.css`: small tool-specific overrides on top of shared/styles.css
+
+Shared dependencies:
+- `shared/printer-interface.js` (now extended with `queryEndstops`, `queryDriverStatus`, `queryFirmwareInfo`)
+- `shared/wizard-framework.js`
+- `shared/step-connect-base.js`
+- `shared/storage-manager.js`