> For the complete documentation index, see [llms.txt](https://tankmate.gitbook.io/tankmate/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tankmate.gitbook.io/tankmate/wi-fi-connectivity/reconnect-v1-level-sensor.md).

# Reconnect - v1 Level Sensor

{% hint style="info" %}
v1 Sensors have a green circuit board inside the sender unit, with a PCB version number starting with v1. 

Note: the app no longer supports adding v1 products to an account.
{% endhint %}

### To clear existing Wi-Fi credentials on a v1 sensor:

* undo the screws to open the lid
* press the external RESET button to wake the unit up
* **hold down** the small button marked **SETUP - as per the video below**

{% embed url="<https://youtu.be/A5TDbmVvBZw>" %}
v1 Sensor - clear the existing Wi-Fi credentials&#x20;
{% endembed %}

### Connect a v1 sensor:

* open the list of **available Wi-Fi networks** on your phone or tablet
* **connect** to the  "**Photon-xxxxxx**" network
* open a **web browser** on your phone
* type in the address **192.168.0.1**
* you will see a blue TankMate screen with prompts to search for the SSID / enter password etc.