Galaxy Watch4 / Android Notes

Project for creating this Galaxy Watch 4 face.

On Linux host, connect to wifi network to connect to phone/watch, which are then available on both Linux and Windows VM.

Connecting to watch

Enable debug mode on watch:

• Settings>About>Software Information> tap Software version six times
• Enable ADB debug mode and wifi debugging
• Enter pairing mode under wifi debugging

On PC (Linux or Windows)

• cd <android platform tools>
• ./adb pair <ip:port> this is provided by pairing screen on watch (if "unknown host service", run adb kill-server and try again)
• ./adb connect <ip:port> the port is different from the pairing port and is provided on the wifi debug screen
• ./adb devices to confirm connection

In WatchFaceStudio:

• Click Publish
• Set password to password
• May need to create keystore
• Build apk then use below adb method to install. Studio doesn't succeed pairing to watch in latest version 24/11/2023)

To install built .apk (both phone and watch use adb connect):

./adb install -r <\path\to\app.apk>

If more than one device connected when installing,

• run: ./adb devices then use device after -s:
• ./adb -s 192.168.6.88:5555 install -r <\path\to\app.apk>

If error about signatures not matching existing package, uninstall previous installation:

• ./adb -s 192.168.6.88:5555 uninstall "com.watchfacestudio.led"

For Android phone: connecting phone to PC (unrelated to Watch)

Can use MTP mode for transfer (not necessary but maybe stops charging if not required).

If connect to phone does not work:

• Connect phone with usb cable to PC.
• ./adb usb
• ./adb tcpip 5555
• ./adb connect <phone ip address>

If phone is connected via usb, you can use the USB device name eg something like RF8N10T8WCJ as the parameter to -s without using the adb connect command.

Useful links:

• https://forum.xda-developers.com/t/debloat-galaxy-watch-4.4324147/
• https://forum.xda-developers.com/t/watch4-adb-commands-disable-enable-uninstall-restore-system-app-install-pull-apps.4324063/
• https://developer.android.com/training/wearables/get-started/debugging - enable wifi debugging on watch

To find app ids, from PC:

adb connect 192.168.xxx.xxx:5555 (your watch IP address & enable debugging)
adb shell
pm list packages