> ## Documentation Index
> Fetch the complete documentation index at: https://support.customtypeone.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Wi‑Fi

SugarPixel Mini/Classic uses **2.4 GHz** WiFi to download your CGM readings. Open your SugarPixel's settings and tap **Wi‑Fi** (or use the **Connect to Wi‑Fi** step of the setup wizard). Then expand the section below that matches your network type. The green **School** and **University** chips at the top of the screen open the matching sections of this page.

> [accordion] Standard Home WiFi
>
> Connect to a standard 2.4 GHz home network
>
> SugarPixel Mini/Classic connects to **2.4 GHz WiFi** networks. The list shows the networks your SugarPixel can see.
>
> 1. Tap your WiFi network under **Networks SugarPixel Mini sees** (or **SugarPixel Classic**)
>
> 2. Enter the password and tap **Connect** (in the setup wizard, the button at the bottom reads **Connect**)
>
> 3. Wait while it joins. Once it's online, the wizard moves on, or the Wi‑Fi screen shows the network as **Connected**
>
> * If it can't join within about 45 seconds, the app shows **Not connected yet**, and SugarPixel Mini/Classic shows a WiFi error message — see the troubleshooting cards below.
>
> * If your network isn't listed, tap **Rescan**. If it still doesn't appear, it may be 5 GHz only. Only use **Enter network manually** for a hidden network — the name is case sensitive.
>
> * If your network has no password, turn on **Network has no password**.
>
> > [!NOTE]
> >
> > **Changing networks:** once a network is saved, the Wi‑Fi screen shows it with its **MAC address**. To join a different network or re-enter the password, tap **Clear Wi‑Fi settings** first, then pick the network again.

> [accordion] University
>
> Register your device on university authentication networks
>
> Set up SugarPixel Mini/Classic at home first, then change only the WiFi on campus. University networks often use special authentication. Most students connect via **device registration**, not a standard password. If you can't connect after following these steps, contact us with your school name.
>
> ### Option 1: Device Registration (Most Common)
>
> Most universities allow IoT devices like smart TVs or gaming consoles to connect by registering the device's MAC address. Search Google for **"\[school name] register device WiFi"** to find your school's instructions, then:
>
> 1. In the SugarPixel app, open your SugarPixel's settings, tap **Wi‑Fi** and note the **MAC address**. It's also shown under **System**.
> 2. Register SugarPixel Mini/Classic on the university website using that MAC address. *(Some schools provide a personal WiFi password instead.)*
> 3. In the app, select the university WiFi network name. If it's not listed, tap **Enter network manually** and type it.
> 4. Enter the password if provided, or turn on **Network has no password** if none is required, then tap **Connect**.
> 5. Continue with the rest of the SugarPixel Mini/Classic setup.
>
> ### Option 2: Standard WiFi Password (Less Common)
>
> Some universities offer a traditional password-based network. SugarPixel Mini/Classic can connect as long as it supports **2.4 GHz WiFi** and does not require a web login page.
>
> ### Option 3: Contact University IT
>
> If you're unsure which option applies, contact IT. They may assist with device registration, allow a small personal router, or provide an alternate network for medical devices. Ask them to reach us at [support@customtypeone.com](mailto:support@customtypeone.com) if needed.
>
> ### Option 4: Mobile Hotspot (Fallback)
>
> If none of the above work, see the **Mobile Hotspot** section for setup details.

> [accordion] School / Work / Firewall Reference
>
> Connect through enterprise or managed network environments
>
> Set up SugarPixel Mini/Classic at home first, then change only the WiFi when you get to school or work. Setup at a school or workplace usually requires IT assistance. Share the requirements below with your IT department. If they have questions, ask them to contact us at [support@customtypeone.com](mailto:support@customtypeone.com).
>
> ### Network Requirements
>
> * **2.4 GHz WiFi only**
> * **WPA2 (password-based) is supported**
> * **Enterprise WiFi (username/password) is not supported**
> * **Captive portals are not supported**
> * SugarPixel Mini/Classic does not need to be on the same WiFi as the CGM phone
>
> ### Firewall / Allowed Endpoints
>
> All connections use **HTTPS** except time sync. Only the CGM in use needs to be allowed.
>
> * **Dexcom:** \*.dexcom.com
> * **Libre:** \*.libreview\.io
> * **Gluroo:** \*.gluroo.com
> * **Nightscout:** patient-specific URL (provide to IT)
> * **System updates:** cdn.shopify.com, \*.customtypeone.com and \*.sugarpixel.com
> * **Time sync (NTP):** \*.ntp.org on port 123 — additional servers returned by NTP must also be reachable. A custom time server can be configured if needed (see Custom Time Server below).
>
> ### Notes for IT
>
> * This list may change as features are updated.
> * Whitelisting by **SugarPixel Mini/Classic MAC address** is the most reliable long-term approach. The MAC address is shown on the **Wi‑Fi** and **System** screens in the app.

> [accordion] Mobile Hotspot / Public WiFi
>
> For hotels, travel, or anywhere that requires a login page to connect
>
> Public WiFi (hotels, cafes, travel) requires a login page that SugarPixel Mini/Classic cannot complete. Connect it through a **mobile hotspot** instead.
>
> > [!NOTE]
> >
> > If you set your hotspot **name and password to match your home WiFi**, SugarPixel Mini/Classic will connect automatically when the hotspot is on — no reconfiguration needed.
>
> ### Hotspot Requirements
>
> * Name and password must use **letters and numbers only** — no spaces or special characters
> * Enable **Compatibility Mode** (or equivalent) to use **2.4 GHz** — this is unrelated to 5G cellular
> * iPhone hotspot name: Settings → General → About → Name
> * Android hotspot name: usually found in Settings → Hotspot settings
>
> ### If you have a second phone or tablet (Recommended)
>
> Most phones disable hotspot while Bluetooth is active.
>
> 1. Enable hotspot on your phone
> 2. Restart SugarPixel Mini/Classic
> 3. On the second device, add SugarPixel Mini/Classic in the SugarPixel app (see [Install & Add a SugarPixel](https://support.customtypeone.com/sugarpixel-mini-classic/mobile-app-setup.md)), open its **Wi‑Fi** settings and select the hotspot network
>
> ### If you only have one phone
>
> 1. Open the app and open your SugarPixel's **Wi‑Fi** settings (tap **Clear Wi‑Fi settings** first if a network is already saved)
> 2. Tap **Enter network manually**, enter the hotspot name and password, and tap **Connect**. The hotspot isn't on yet, so the app will say **Not connected yet** — that's expected. Tap **OK**.
> 3. Go back to the app's home screen and unplug SugarPixel Mini/Classic
> 4. Enable hotspot on your phone, then plug SugarPixel Mini/Classic back in

> [accordion] Custom Time Server (Advanced)
>
> Classic only — set an internal or alternate NTP server
>
> SugarPixel Classic uses public NTP servers by default. If your network requires an internal or alternate time server, you can set a custom one using a micro SD card (16 GB or smaller).
>
> 1. Create a file on the SD card named `config.txt`
> 2. Add one line: `ntpserver=YourServer` — replacing YourServer with an IP address, fully qualified domain name, or hostname.local
> 3. With SugarPixel Classic unplugged, insert the SD card into the slot on the back
> 4. Plug in power to start SugarPixel Classic
>
> If the custom time server is unavailable, SugarPixel Classic falls back to the default public servers. To revert to defaults, reboot SugarPixel Classic without the SD card inserted.

***

### Troubleshooting

> [card] [WiFi Error Messages](https://support.customtypeone.com/sugarpixel-mini-classic/troubleshooting/wifi-error-messages.md)

> [card] [Readings Delayed or Not Updating](https://support.customtypeone.com/sugarpixel-mini-classic/troubleshooting/delayed-readings-mesh-networks.md)

> [card] [Firewall Issue](https://support.customtypeone.com/sugarpixel-mini-classic/troubleshooting/firewall-issue.md)

> [card] [WiFi in Green](https://support.customtypeone.com/sugarpixel-mini-classic/troubleshooting/wifi-in-green.md)


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