> For the complete documentation index, see [llms.txt](https://docs.senstream.com/senstream-researcher-ring-application-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.senstream.com/senstream-researcher-ring-application-user-guide/senstream-research-ring/update-firmware.md).

# Update Firmware

### How to Update Firmware

#### Step 1: Updating ring firmware requires an iOS device and the Senstream app. 

If installing the app for the first time we recommend reviewing the [iOS app getting started documentation](/senstream-researcher-ring-application-user-guide/ios-mobile-app/getting-started.md).

#### Step 2:  Open Record a Session screen using a variety of options in the app.

<div align="left"><figure><img src="/files/EhUZKdRsfiVGRiKZCTLm" alt="" width="188"><figcaption><p>Local Files Browser mode</p></figcaption></figure> <figure><img src="/files/Hg1zF3bDLWHOsaYYtGWy" alt="" width="188"><figcaption><p>Senstream Cloud mode</p></figcaption></figure></div>

#### Step 3:  Find the ring or pair it if it's not connected.&#x20;

If new firmware is available an indicator will show. Tap on the ring to see the Ring Details.

<div align="left"><figure><img src="/files/G5haxIRsTecehoVa6Bvb" alt="" width="188"><figcaption></figcaption></figure></div>

#### Step 4: Find Firmware in Ring Details and tap “Upgrade firmware”

<div align="left"><figure><img src="/files/eJiXgXuvjFICeLkxKANZ" alt="" width="188"><figcaption></figcaption></figure></div>

#### Step 5:  View available firmware and select the latest to update. &#x20;

Note: It is possible to change the firmware to any version.  After selecting the firmware version, the list will close and return to the Ring Detail screen where a progress bar will show the firmware loading onto the ring.

<div align="left"><figure><img src="/files/CvDZtdElFQx3WwRdHc2E" alt="" width="188"><figcaption></figcaption></figure> <figure><img src="/files/7eNrVITwI0biS30K7FRd" alt="" width="188"><figcaption></figcaption></figure></div>

#### The firmware is now updated

<div align="left"><figure><img src="/files/APR2BpnAoL9LsiUoOGg3" alt="" width="188"><figcaption></figcaption></figure></div>

***

### Release Notes

<table><thead><tr><th width="116">Version</th><th width="479">Notes</th><th>Date</th></tr></thead><tbody><tr><td>1.2.1</td><td><p>LED state changes</p><ul><li>Battery charging and discharging calculation improvement </li><li>Temperature calculation fix</li><li>Simplified LED state during charging (Yellow = Charging, Green = Fully charged) </li></ul></td><td>8/23/24</td></tr><tr><td>1.2.0</td><td><p>Features</p><ul><li>50Hz 3-axis linear acceleration</li><li>ECG LPF changed from 160Hz to 320Hz</li><li>Finger detection time reduced from 2.5s to 0.5s</li></ul><p>Fixes</p><ul><li>Remaining battery life % accuracy improved</li></ul></td><td>4/30/24</td></tr><tr><td>1.1.0</td><td>Simplified LED indication of battery charge progress; Ring restart if place on charger more than 30 seconds since last startup</td><td>10/16/23</td></tr><tr><td>1.0.1</td><td>First beta release version of the Senstream Research Ring FW</td><td>02/12/23</td></tr><tr><td>0.1.3</td><td>First beta release version of the Senstream Research Ring FW</td><td>02/12/23</td></tr></tbody></table>