> For the complete documentation index, see [llms.txt](https://docs.ssz.gg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ssz.gg/dma-guides/dma-introduction/makcu-guides/makcu-flashing.md).

# Makcu Flashing

The **SSZ.GG DMA Tool** includes a built-in Makcu firmware flasher (using a bundled esptool). No separate AIO Tool download.

<a href="https://mega.nz/folder/X0ZGXJbD#ViwAOHthSnhKXs-KEWgpqw" class="button primary" data-icon="desktop-arrow-down">Download SSZ.GG DMA Tool</a>

{% stepper %}
{% step %}

### Open the Makcu Setup tab

Launch the **SSZ.GG DMA Tool as Administrator** and click the **Makcu Setup** tab.

<figure><img src="/files/BSEKasqxG2yzuG9W2Jv9" alt="SSZ.GG DMA Tool — Makcu Setup tab"><figcaption></figcaption></figure>

The CH343 driver must already be installed — see [Makcu Driver](/dma-guides/dma-introduction/makcu-guides/makcu-driver.md).

{% hint style="info" %}
The first time you flash, the tool will **download esptool (\~33 MB)**. It's cached afterwards.
{% endhint %}
{% endstep %}

{% step %}

### Pick a firmware version

In the **Firmware Flasher** card on the right, choose a version from the **Firmware Version** dropdown.
{% endstep %}

{% step %}

### Flash the LEFT side

1. Connect the **LEFT side of the Makcu** to the 2nd PC via a **USB-C data cable**
2. Click **Flash LEFT**
3. Watch the **Operation Log** for progress
4. Wait for the success message
5. Disconnect the USB cable from the LEFT side
   {% endstep %}

{% step %}

### Flash the RIGHT side

1. Connect the **RIGHT side of the Makcu** to the 2nd PC via the same USB-C data cable
2. Click **Flash RIGHT**
3. Wait for the flash to complete
   {% endstep %}
   {% endstepper %}

***

## You're Done

Both sides of your Makcu are flashed. If you run into issues, see [Makcu Troubleshooting](/dma-guides/dma-introduction/makcu-guides/makcu-troubleshooting.md).


---

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