User guide

SugarHalo Mini User Guide

A practical guide for setting up a brand-new or freshly reset SugarHalo Mini, troubleshooting common symptoms, and understanding every setting after setup is complete.

Setup Guide / What's in the box

What's in the box

This setup guide is for a brand-new or freshly reset SugarHalo Mini. Follow it from top to bottom the first time you set up the device.

Included

  • SugarHalo Mini device.
  • USB-C to USB-A power cable.

Before powering on

Remove the protective film from the screen. The film has a pull tab at the bottom edge.

Setup Guide / Power on

Power on

Plug the device in and let it start the WiFi setup flow automatically.

USB-C cable being plugged into SugarHalo Mini
SugarHalo Mini boot screen showing the SugarHalo logo and loading progress bar
  1. Connect the cable. Plug the USB-C end of the cable into SugarHalo Mini.
  2. Connect power. Plug the USB-A end into any USB-A power source.
  3. Wait for WiFi setup. The device powers on automatically and boots to the WiFi setup screen.

Setup Guide / Connect to WiFi

Connect to WiFi

First, SugarHalo Mini creates a temporary setup network. That network is only used to connect the device to your home WiFi.

Two portals, two purposes

The temporary SugarHalo-XXXXXX setup network is only for connecting the display to home WiFi. The six-character suffix is unique to that display and matches the end of its WiFi MAC address. After the display joins your home network, the setup network disappears. Open the regular portal using the unique address shown on the display, such as sugarhalo-XXXXXX.local, while your phone or computer is on the same home WiFi.

  1. Read the setup network on the device. The screen shows a network named SugarHalo-XXXXXX and an 8-character password. Use the network whose six-character suffix matches the display you are setting up. Letters in the password are uppercase.
  2. Join the SugarHalo network. On your phone or computer, open WiFi settings and join the SugarHalo network shown on the device.
  3. Open the setup portal. The portal should open automatically. If it does not, tap Portal QR on the display and scan the QR code. You can also enter 192.168.4.1 in your browser while connected to the SugarHalo setup network.
  4. Connect home WiFi. In the portal, select your home WiFi network from the list, enter the password, and tap Connect.
  5. Let the device reboot. SugarHalo Mini reboots and joins your home WiFi network.

Setup Guide / Set up your CGM

Set up your CGM

After rebooting onto home WiFi, SugarHalo Mini shows a CGM Setup screen with a QR code and a 4-digit PIN below it. Start here, then open the separate page for the CGM source you use.

  1. Open the full portal. Scan the QR code, or enter the unique address shown on the display, such as sugarhalo-XXXXXX.local, in a browser on the same home WiFi. If that address does not open, use the IP address shown as the fallback on the display.
  2. Enter the PIN. Use the 4-digit PIN shown on the device screen.
  3. Open CGM Setup. In the portal, open CGM Setup and choose your source.

Dexcom

Use Dexcom if your readings come through Dexcom Share.

Open Dexcom setup

Nightscout

Use Nightscout if your readings are available from a Nightscout site.

Open Nightscout setup

LibreLinkUp

Use LibreLinkUp if a follower account can already see the person you want displayed.

Open LibreLinkUp setup

Setup Guide / Set up your CGM / Dexcom

Dexcom setup

Use this source when glucose data is available through Dexcom Share.

  1. Turn on Dexcom Share first. In the Dexcom app, open Connections > Share, turn sharing on, and make sure at least one follower is invited or active. SugarHalo cannot fetch Dexcom readings until Share is enabled.
  2. Choose Dexcom. In SugarHalo CGM Setup, select Dexcom as the source.
  3. Enter the Dexcom User ID and password. Use the login for the Dexcom account that is publishing the readings, not a follower-only Dexcom Follow account. The User ID may be a username, email address, or mobile number, depending on how the Dexcom account was created. If the account uses a mobile number, enter it with a plus sign, country code, and no spaces or punctuation, like +11234567890.
  4. Choose the server region. Select US if the Dexcom account is in the United States, or Outside US for international Dexcom Share accounts. A correct User ID and password can still fail if the wrong server option is selected.
  5. Save the source. Continue after the portal confirms the Dexcom connection.

Setup Guide / Set up your CGM / Nightscout

Nightscout setup

Use this source when glucose data is published to a compatible Nightscout site.

  1. Choose Nightscout. In CGM Setup, select Nightscout as the source.
  2. Enter the Nightscout URL. Use the main site URL, not a direct API path.
  3. Enter the API key. Add the API key if your Nightscout site requires one.
  4. Save the source. Continue after the portal confirms the Nightscout connection.

Setup Guide / Set up your CGM / LibreLinkUp

LibreLinkUp setup

Use this source when a LibreLinkUp follower account can already see the person you want displayed.

  1. Choose LibreLinkUp. In CGM Setup, select LibreLinkUp as the source.
  2. Enter your login. Enter the LibreLinkUp email and password for the follower account.
  3. Choose the person. After signing in, SugarHalo Mini shows the people the follower account is following. Tap the person you want the device to display.
  4. Confirm the selection. Nothing is auto-selected, even if there is only one person. You always tap to choose.

Setup Guide / Finish setup

Finish setup

After the CGM source is connected, finish the profile and save the device configuration.

  1. Name the profile. Set a custom profile name in the portal.
  2. Adjust glucose thresholds. Set the high and low thresholds you want SugarHalo Mini to use.
  3. Save and reboot. Tap Save and Reboot at the bottom of the portal. The device reboots, connects to the glucose service, and shows the home screen.

Setup Guide / Your home screen

Your home screen

Once setup is complete, the home screen shows your current reading and device status.

SugarHalo Mini firmware 1.4.9 home screen showing the Control Center chevron, profile name, glucose value, trend, and refresh bar 1 2 3 4 5
1

Status bar

Digital time is on the top left. The wide down chevron in the center opens Control Center. The sound and WiFi icons are on the right.

2

Profile name

The custom profile name appears below the status bar.

3

Glucose number

The large value shows the current glucose reading and unit, either mg/dL or mmol/L.

4

Delta and trend

The delta value and trend arrow show how the reading is changing.

5

Refresh bar

The blue bar fills to show when the next reading will be fetched.

Open Portal

Open Control Center, then tap the QR icon labeled Open Portal. The portal opens for 15 minutes and displays its QR code, unique local address, fallback IP address, and PIN.

Sound icon

The speaker turns red with an X when the device is muted or the volume is set to zero.

WiFi icon

Normal means connected with internet. Amber means connected to WiFi but no internet. Red means no WiFi connection.

Control Center

Tap the wide down chevron at the top center of the home screen. Control Center provides quick brightness, volume, mute, sleep mode, theme color, alert duration, Open Portal, and full Settings controls.

Troubleshooting / Device won't power on

Device won't power on

Start with the power source and cable before assuming the device has failed.

  1. Check the cable. Make sure the USB-C plug is fully seated in the device.
  2. Try another power source. Use a different USB-A wall adapter, computer port, or charger.
  3. Try another cable if available. A damaged cable can prevent the device from booting.
  4. Contact support. If the screen never lights after trying known-good power, email support@sugarhalo.com.

Troubleshooting / Can't connect to WiFi

Can't connect to WiFi

Most WiFi setup problems come from joining the wrong network, mistyping the password, or using a network the device cannot use.

  1. Use 2.4 GHz WiFi. If your router separates bands, choose the 2.4 GHz network.
  2. Check the password. Re-enter the home WiFi password carefully.
  3. Stay near the router. Move the device closer during setup if signal is weak.
  4. Restart setup if needed. Rejoin the temporary SugarHalo-XXXXXX network shown on this display and try connecting again.

Troubleshooting / Setup portal won't open

Setup portal won't open

Some phones or computers do not automatically open captive setup portals.

  1. Confirm you joined SugarHalo-XXXXXX. Match the six-character suffix shown on the display. The portal only opens while connected to that temporary setup network.
  2. Use the QR fallback. Tap Portal QR on the display and scan the code.
  3. Type the setup address. While still connected to the SugarHalo setup network, enter 192.168.4.1 in a browser.
  4. Try another device. If a Windows computer does not open it, try a phone or another browser.

Troubleshooting / Can't sign in to CGM / login error

Can't sign in to CGM / login error

Check credentials, source-specific options, and whether the source account can actually see readings.

Dexcom

Check the username and password, then confirm the correct US or Outside US server option is selected.

LibreLinkUp

Check the email and password, and confirm the follower account can see the person's readings in LibreLinkUp.

Nightscout

Check the Nightscout URL, API key, and whether the site is online in a normal browser.

Troubleshooting / No glucose data showing

No glucose data showing

No glucose data means the device does not currently have a fresh usable reading from the selected source.

  1. Check WiFi. Make sure the WiFi icon is connected and not red.
  2. Check internet. Amber WiFi means connected to WiFi but no internet.
  3. Check the source app. Confirm Dexcom, LibreLinkUp, or Nightscout has recent readings.
  4. Wait for retry. Leave the device powered so it can keep fetching data.
  5. Recheck CGM settings. If the source account changed, update the CGM source from settings.

Troubleshooting / Alerts not sounding

Alerts not sounding

Alert sound depends on thresholds, volume, duration, and whether the current reading is outside range.

  1. Check volume. Make sure the volume slider is not set to zero.
  2. Check thresholds. Confirm the high and low thresholds match what you expect.
  3. Check duration. A very short duration may be easy to miss.
  4. Test the sound. Use the portal sound test after changing alert settings.

Troubleshooting / Firmware update appears stuck

Firmware update appears stuck

Firmware updates need stable power, internet, and enough time to finish.

  1. Keep power connected. Do not unplug immediately while the update is running.
  2. Wait a few minutes. Downloading, applying, and rebooting can take time.
  3. Power cycle if it never returns. If the normal screen does not come back, unplug the device and plug it in again.
  4. Retry on a stable network. Reopen the portal and try the update again when WiFi and internet are steady.

SugarHalo Settings / Control Center

Control Center

Control Center puts the settings you use most within one tap of the home screen.

  1. Open Control Center. Tap the wide down chevron at the top center of the home screen.
  2. Use quick controls. Adjust brightness and volume, mute sound, toggle sleep mode, choose a theme color, or change alert duration.
  3. Open the web portal. Tap the QR icon labeled Open Portal to show the device-specific QR code, local address, fallback IP address, and PIN.
  4. Open full Settings. Tap Settings for the complete on-device menus.

SugarHalo Settings / Accessing the web portal

Accessing the web portal

The regular web portal is available after SugarHalo Mini is already connected to your home WiFi.

  1. Open Control Center. Tap the wide down chevron at the top center of the home screen.
  2. Activate the portal. Tap the QR icon labeled Open Portal.
  3. Open the portal. Scan the QR code or enter the unique address shown on the display, such as sugarhalo-XXXXXX.local, while connected to the same home WiFi.
  4. Use the fallback if needed. If the unique local address does not open, enter the fallback IP address shown on the display.
  5. Enter the PIN. Use the 4-digit PIN shown by the device.
  6. Finish within the window. The portal stays open for 15 minutes for security, then closes.

How settings save in firmware 1.4.9

Most profile, time, display, alert, audio, brightness, sleep, appearance, and update preferences save automatically and apply without restarting. WiFi and CGM source changes still use Save & Restart when a restart is required.

SugarHalo Settings / Alerts and sounds

Alerts and sounds

Customize how SugarHalo Mini sounds when glucose crosses your configured thresholds.

  • Use up to four custom alert sound slots.
  • Custom alert sounds must be MP3 files.
  • Set a duration per alert. The sound loops until the set duration is reached.
  • Mute the device fully by setting the volume slider to zero.
  • Set high and low glucose thresholds from the portal.

SugarHalo Settings / Sleep schedule and brightness

Sleep schedule and brightness

Sleep mode keeps the screen faintly visible while making it less distracting at night.

  • Turn on the sleep schedule and set the time window when sleep mode activates.
  • Sleep brightness defaults to 1%, so the screen remains faintly visible.
  • To change sleep brightness, the device must currently be in sleep mode during the scheduled window, then adjust the brightness slider.
  • When the device is not in the sleep window, the brightness slider adjusts normal daytime brightness.

SugarHalo Settings / Custom themes

Custom themes

Custom themes let you choose a background color for SugarHalo Mini screens.

  • Set a custom theme in the web portal or on the device under Display Settings.
  • Choose a background color from the palette, applied across all screens.
  • When a custom theme is active, SugarHalo Mini detects whether the background is dark or light and uses white or black text for contrast.
  • Custom themes turn off default glucose color-coding.
  • In the default black theme, the glucose number and delta are color-coded: green in range, yellow for high or low warning, and red for urgent high or urgent low.

SugarHalo Settings / Switching WiFi without a full reset

Switching WiFi without a full reset

You can change WiFi without clearing CGM, display, and alert settings.

  • Use the WiFi section in the web portal, or use on-device Settings -> WiFi -> Change WiFi.
  • The device returns to WiFi setup access point mode.
  • All other saved settings are remembered.

SugarHalo Settings / Switching CGM source without a full reset

Switching CGM source without a full reset

Change the CGM source without clearing WiFi and other saved settings.

  • On the device, open Settings -> CGM Settings -> delete/change CGM.
  • The device returns to the CGM Setup QR screen.
  • Set up the new source from the portal.
  • WiFi and other saved settings are retained.

SugarHalo Settings / Other settings

Other settings

These settings are useful after the device is already set up.

General Settings

Choose 12-hour or 24-hour time format and set the time zone.

CGM Settings

Set units to mg/dL or mmol/L, edit the profile name, or delete CGM settings.

Factory reset

Use factory reset when you want to clear saved settings and start over from the beginning.

Have an idea for SugarHalo Mini? Send a feature request and help shape what comes next.
Request a feature