MartinLogan MP500 v2 Firmware Update

Step 1: Get Your MP500 v2 Ready

Plug the MP500 v2 into your computer or phone and continue with the Start Update button below.

Quickest path: click Start Update first. The page will prompt for your MP500 v2's USB serial port and reboot it into firmware update mode automatically.

Why the refreshes later? MartinLogan MP500 v2 uses a two-stage update flow. Your browser needs to refresh between stages so it can reconnect to the device correctly.

Step 2: macOS Update

Follow the status messages next to the Start Update button.

1. Make sure your MP500 v2 is plugged in.
2. Click Start Update.
3. A browser pop-up will ask for permission. Select 5504FX-EK and click Connect.
4. The status message will tell you when it is time to REFRESH PAGE. Do it with ⌘+R.
5. After refreshing, the page may ask you to click the button again for Stage 2 permission. Select 5504FX-EK DFU Update and click Connect.
6. The status will again say REFRESH PAGE AGAIN.
7. One last time: after the final refresh, click the button if needed and the Update should start automatically.

Did it work? Keep an eye on the progress log. "Update Complete!" means success and your MP500 v2 will reboot with the new firmware.

Step 2: Windows Update

Follow the status messages next to the Start Update button.

1. Make sure your MP500 v2 is plugged in.
2. Click Start Update.
3. A browser pop-up will ask for permission. Select 5504FX-EK and click Connect.
4. The status message will tell you when it is time to REFRESH PAGE.
5. After refreshing, the page may ask you to click the button again for Stage 2 permission. Select 5504FX-EK DFU Update and click Connect.
6. The status will again say REFRESH PAGE AGAIN.
7. One last time: after the final refresh, click the button if needed and the Update should start automatically.

Did it work? Keep an eye on the progress log. "Update Complete!" means success and your MP500 v2 will reboot with the new firmware.

Step 2: Linux Update Prep (Permissions)

Linux usually needs a quick one-time udev rule so the browser can talk to the MP500 v2.

A. Create udev Rule (Choose One Method)

You only need to do this once per computer.

Method 1: Manual Steps

1. Open your terminal.
2. Create or edit the rules file:
   sudo nano /etc/udev/rules.d/51-mcuboot.rules
3. Paste these lines:

   SUBSYSTEM=="usb", ATTR{idVendor}=="2485", ATTR{idProduct}=="432f", MODE="0666", GROUP="plugdev"
   SUBSYSTEM=="usb", ATTR{idVendor}=="2485", ATTR{idProduct}=="4f2f", MODE="0666", GROUP="plugdev"

4. Save and exit Nano: Ctrl+X, then Y, then Enter.
5. Check group membership: run groups and see whether plugdev is listed.
6. Add yourself to the group if needed:
   sudo usermod -aG plugdev $USER
7. Reload rules:
   sudo udevadm control --reload-rules && sudo udevadm trigger
8. Log out and back in if the group membership changed.

Method 2: Bash One-Liner

This command creates the file, adds your user, and reloads the rules:

echo -e 'SUBSYSTEM=="usb", ATTR{idVendor}=="2485", ATTR{idProduct}=="432f", MODE="0666", GROUP="plugdev"\nSUBSYSTEM=="usb", ATTR{idVendor}=="2485", ATTR{idProduct}=="4f2f", MODE="0666", GROUP="plugdev"' | sudo tee /etc/udev/rules.d/51-mcuboot.rules > /dev/null && sudo usermod -aG plugdev $USER && sudo udevadm control --reload-rules && sudo udevadm trigger && echo "Rule created or updated. Log out/in if you were not already in plugdev."

B. Linux Update (After Setup & Login)

9. Re-plug your MP500 v2 after the rule setup and login refresh. It should be in firmware update mode.
10. Click Start Update.
11. If the browser asks, choose 5504FX-EK and click Connect.
12. Click REFRESH PAGE when the status tells you to.
13. After refreshing, the page may ask you to click the button again for Stage 2 permission. Select 5504FX-EK DFU Update and click Connect.
14. Click REFRESH PAGE AGAIN when asked.
15. Click the button after the second refresh if needed. Flashing starts from there.

Watch the progress log. "Update Complete!" means success and your MP500 v2 will reboot.

Step 2: Android Update Prep

You must use Google Chrome on Android for WebUSB to work reliably.

A. Get Connected & Check OTG

1. Make sure your MP500 v2 is powered on.
2. Plug MP500 v2 into your phone with either a USB-C cable or an OTG adapter.
3. Enable OTG if necessary. If the MP500 v2 is not detected later, check your phone settings for an OTG option.

B. Android Update

Then follow the messages next to the Start Update button:

4. Click Start Update.
5. Choose 5504FX-EK when Google Chrome asks for permission.
6. When the status says REFRESH PAGE, pull down from the top in Google Chrome until you see the refresh icon.
7. After refreshing, tap the button again if needed and pick 5504FX-EK DFU Update.
8. If the page says REFRESH PAGE AGAIN, pull down to refresh again.
9. Tap the button one last time if needed. The Update should then start automatically.

Keep an eye on the progress log. "Update Complete!" means your MP500 v2 is ready to reboot and show off.