AAPS on Wear OS smartwatch

You can install AndroidAPS app on your Wear OS based smartwatch. Watch version of AAPS allows you to:

  • display data on your watch: by providing custom watchfaces or in standard watchfaces with use of complications
  • control AAPS on phone: to bolus, set a temporary target etc.

Before you buy watch...

  • Some features like complications require Wear OS version 2.0 or newer to work
  • Google rebranded Android Wear 1.x to Wear OS from version 2.x, so when it says Android Wear it may indicate older 1.x version of system
  • If description of smartwatch indicates only compatibility with Android and iOS - it does not means it runs on Wear OS - it may as well be some other sort of Vendor specific OS which is not compatible with AAPS wear!
  • Check list of tested phones and watches and ask community if in doubt if your watch will be supported

Building Wear OS version of AAPS

To build Wear OS version of AAPS you needed to select the build variant “fullRelease” when building the APK (or “pumpRelease” will allow you to just remote control the pump without looping).

Make sure both phone and wear versions of AAPS are signed with same keys!

Wear variant of APK need to be installed on watch in the same way you will install phone APK on phone. It may require enabling developer mode on watch and uploading and installing APK on watch with: adb install wear-full-release.apk

When using wear version of AAPS, always update it together with phone version of app - keep their versions in sync.

Setup on the Phone

Within AndroidAPS, in the ConfigBuilder you need to enable Wear plugin.

Controlling AAPS from Watch

AndroidAPS is designed to be controlled by Android Wear watches. If you want to bolus etc. from the watch then within “Wear settings” you need to enable “Controls from Watch”.

The following functions can be triggered from the watch:

  • set a temporary target
  • administer a bolus
  • administer eCarbs
  • use the bolus calculator (calculation variables can be defined in settings on the phone)
  • check the status of loop and pump
  • show TDD (Total daily dose = bolus + basal per day)

AAPS Watchfaces

There are several watchfaces to choose from that include average delta, IOB, currently active temp basal rate and basal profiles + CGM readings graph.

Ensure notifications from AndroidAPS are not blocked on the watch. Confirmation of action (e.g. bolus, tempt target) comes via notification which you will need to swipe and tick.

To get faster to the AAPS menu, do a double tap on your BG. With a double tap onto the BG curve you can change the time scale..

Watchfaces available

Available watchfaces

AAPSv2 watchface - Legend

Legend AndroidAPSv2 watchface

A - time since last loop run

B - CGM reading

C - minutes since last CGM reading

D - change compared to last CGM reading (in mmol or mg/dl)

E - average change CGM reading last 15 minutes

F - phone battery

G - basal rate (shown in U/h during standard rate and in % during TBR)

H - BGI (blood glucose interaction) -> the degree to which BG “should” be rising or falling based on insulin activity alone.

I - carbs (carbs on board | e-carbs in the future)

J - insulin on board (from bolus | from basal)

Accessing main menu of AAPS

To access main menu of AAPS you can use on of following options:

  • double tap on your BG value
  • select AAPS icon in watch applications menu
  • tap on AAPS complication (if configured for menu)

Settings (in wear watch)

To access to the watchface settings, enter AAPS main menu, slide up and select “Settings”.

Filled star is for enabled state (On), and hollow star icon indicates that setting is disabled (Off):

Settings on/off

AAPS companion parameters

  • Vibrate on Bolus (default On):
  • Units for Actions (default mg/dl): if On units for actions is mg/dl, if Off unit is mmol/l. Used when setting a TT from watch.

Watchface settings

  • Show Date (default Off): note, date is not available on all watchfaces
  • Show IOB (default On): Display or not IOB value (setting for detailed value is in AAPS wear parameters)
  • Show COB (default On): Display or not COB value
  • Show Delta (default On): Display or not the BG variation of the last 5 minutes
  • Show AvgDelta (default On): Display or not the average BG variation of the last 15 minutes
  • Show Phone Battery (default On): Phone battery in %. Red if below 30% .
  • Show Rig Battery (default Off): Rig battery is a synthesis of Phone battery, pump battery and sensor battery (generally the lowest of the 3 values)
  • Show Basal Rate (default On): Display or not current basal rate (in U/h or in % if TBR)
  • Show Loop Status (default On): show how many minutes since last loop run (arrows around value turn red if above 15’).
  • Show BG (default On): Display or not last BG value
  • Show Direction Arrow (default On): Display or not BG trend arrow
  • Show Ago (default On): show how many minutes since last reading.
  • Dark (default On): You can switch from black background to white background (except for Cockpit and Steampunk watch face)
  • Highlight Basals (default Off): Improve the visibility of basal rate and temp basals
  • Matching divider (default Off): For AAPS, AAPSv2 and AAPS(Large) watchfaces, show contrast background for divider (Off) or match divider with the background color (On)
  • Chart Timeframe (default 3 hours): you can select in the sub menu the max time frame of your chart between 1 hour and 5 hours.

User Interface setting

  • Input Design: with this parameter, you can select the position of “+” and “-” buttons when you enter commands for AAPS (TT, Insulin, Carbs...)

Input design options

Specific watchface parameters

Steampunk watchface

  • Delta Granularity (default Medium)

Steampunk_gauge

Circle WF

  • Big Numbers (default Off): Increase text size to improve visibility
  • Ring History (default Off): View graphically BG history with gray rings inside the hour’s green ring
  • Light Ring History (default On): Ring history more discreet with a darker gray
  • Animations (default On): When enabled, on supported by watch and not in power saving low-res mode, watchface circle will be animated

Commands settings

  • Wizard in Menu (default On): Allow wizard interface in main menu to input Carbs and set Bolus from watch
  • Prime in Menu (default Off): Allow Prime / Fill action from watch
  • Single Target (default On):
    • On: you set a single value for TT
    • Off: you set Low target and high target for TT
  • Wizard Percentage (default Off): Allow bolus correction from wizard (value entered in percentage before confirmation notification)

Troubleshooting the wear app:

  • On Android Wear 2.0 the watch screen does not install by itself anymore. You need to go into the playstore on the watch (not the same as the phone playstore) and find it in the category apps installed on your phone, from there you can activate it. Also enable auto update.
  • Sometimes it helps to re-sync the apps to the watch as it can be a bit slow to do so itself: Android Wear > Cog icon > Watch name > Resync apps.
  • Enable ADB debugging in Developer Options (on watch), connect the watch via USB and start the Wear app once in Android Studio.

View Nightscout data

If you are using another looping system and want to view your looping detail on an Android Wear watch, or want to watch your child’s looping, then you can build/download just the NSClient APK. To do this follow the build APK instructions selecting the build variant “NSClientRelease”. There are several watchfaces to choose from that include average delta, IOB, currently active temp basal rate and basal profiles + CGM readings graph.

Pebble

Pebble users can use the Urchin watchface to view looping data (if uploaded to Nightscout), but you will not be able to interact with AndroidAPS through the watch. You can choose fields to display such as IOB and currently active temp basal rate and predictions. If open looping you can use IFTTT to create an applet that says if Notification received from AndroidAPS then send either SMS or pushover notification.