> For the complete documentation index, see [llms.txt](https://linemasters-organization.gitbook.io/linemaster-2.4ghz-zephyr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://linemasters-organization.gitbook.io/linemaster-2.4ghz-zephyr/resources/firmware-update.md).

# Firmware Update

One of the features we’re proud to offer is the ability to **add new functionalities and fix bugs through firmware updates**. Keep in mind—this is a fully handcrafted project, and it's not free from imperfections. All updates are **free of charge**. 

Firmware updates are designed to apply **progressively and automatically**, so you can go from version 1 to version 10 in a single step—no need to manually install 2, 3, 4... through 9.

{% hint style="warning" %}
Read this section carefully before attempting any update. Improper handling could leave your device in an unrecoverable state.
{% endhint %}

## How to Update

{% stepper %}
{% step %}

### Remove the battery

Power off the handle, unscrew the battery cover, and remove the battery.\
Place it in a safe spot—**avoid short circuits**, which could damage the battery or cause a fire.
{% endstep %}

{% step %}

### Remove the SD card

The SD card is located just above the positive battery contact. (Use tweezers if needed.) Take note of the orientation so you can reinsert it correctly later. 

{% embed url="<https://www.youtube.com/watch?v=luY4QEwenn4>" %}
{% endstep %}

{% step %}

### Insert the SD card into a computer&#x20;

Connect the card using an adapter or built-in SD reader.

{% hint style="info" %}
The contents of the SD card will remain after the update, but we **recommend making a backup** of the card on your computer.
{% endhint %}
{% endstep %}

{% step %}

### Download the firmware

Download the latest firmware file from the section below and copy it directly onto the SD card — not inside any folder. The file must be named exactly: `firmware.bin`.

{% hint style="danger" %}
*Do not use firmware from other sources—this may corrupt your device.* Proceed at your own risk and understand that it may void support.
{% endhint %}
{% endstep %}

{% step %}

### Reinsert the SD card into the handle

Safely eject the SD card from your computer and insert it into the handle, ensuring it is **firmly seated**. Reinstall the battery, cover, and screw—**be careful not to press against the SD card when closing the cover.**

{% hint style="danger" %}
Respect the battery polarity as marked on the handle. Incorrect polarity may damage the device or cause a fire.
{% endhint %}
{% endstep %}

{% step %}

### Power on the handle

Turn the handle on and wait a few seconds. If everything was done correctly, you’ll see a **confirmation message** indicating the update was successful. The device will then restart automatically.

To double-check, go to the **Information** menu and confirm the installed firmware version.\
Congratulations! Your device is now up to date.
{% endstep %}
{% endstepper %}

## Versions

### V 1.3.2 (Latest stable version)

#### Change log

* Implemented throttle input smoothing.

{% hint style="info" %}
After updating with this version, it’s a good idea to **run trigger calibration** once to ensure the throttle range is perfectly aligned.
{% endhint %}

### V 1.2.6&#x20;

#### Change log

* Implement trigger calibration feature
* Optimized performance

### V 1.1.5

#### Change log

* Solved interference issues
* Improving the security layer with encrypted signal
* Optimized performance

{% hint style="warning" %}
This firmware version is only compatible with receiver firmware **V 1.1.0** or higher. To update your receiver visit <https://linemasters-organization.gitbook.io/linemaster-2.4ghz-lm-5x-5ch-receiver/firmware-update>.
{% endhint %}

{% file src="/files/k0uJ8teumZCJDJSkKUib" %}