> For the complete documentation index, see [llms.txt](https://development-test.pycom.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://development-test.pycom.io/advanced-topics/downgrade.md).

# Firmware Downgrade

The firmware upgrade tool usually updates your device to the latest available firmware version. If you require to downgrade your device to a previous firmware there are two methods to achieve this.

{% hint style="info" %}
If you are using an Expansion Board 1.0 or 2.0, you will need to have a jumper connected between `G23` and `GND` to use either procedure below. You will also need to press the reset button before beginning.
{% endhint %}

You can obtain previous firmware versions here:

* [WiPy](https://software.pycom.io/downloads/WiPy.html)
* [LoPy](https://software.pycom.io/downloads/LoPy.html)
* [SiPy](https://software.pycom.io/downloads/SiPy.html)
* [GPy](https://software.pycom.io/downloads/GPy.html)
* [FiPy](https://software.pycom.io/downloads/FiPy.html)
* [LoPy4](https://software.pycom.io/downloads/LoPy4.html)

{% hint style="info" %}
Prior to version `1.16.0.b1` the firmware for modules with LoRa functionality was frequency specific. From `1.16.0.b1` and onward, the firmware is region agnostic and this can either be set programatically or via the config block (see [here](/advanced-topics/cli.md#lpwan)).
{% endhint %}

## GUI

As of version `1.12.0.b0` of the firmware update tool, you can now provide a `.tar` or `.tar.gz` archive of the firmware you wish to upload to the board.

When you start the update tool you will see the following screen:

![](https://3086745545-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LIL0iGdl11z7Jos_jpX%2F-LKN7scqKKkb6TqB3uYO%2F-LKN85lnGg4XmrOf1mPm%2Fdowngrade_gui.png?generation=1534782108075363\&alt=media)

When you tick the `Flash from local file` option, an address bar will appear. Click the `...` button and locate the `.tar(.gz)` file with the firmware you wish to flash to your device. From this point the updater will behave just like a regular update but using the local file instead of downloading the latest.

## Command line

You can also use the [CLI](/advanced-topics/cli.md) version of the update tool to downgrade your device. Will need to get a `.tar` or `.tar.gz` archive of the firmware you wish to upload to the board. Then run the following commands:

```bash
$ pycom-fwtool-cli -v -p PORT flash -t /path/to/firmware/archive.tar.gz
```