Install TicWatch E & S (mooneye)

Hardware Support

Before installing AsteroidOS to your watch, make sure you are aware of the capabilities and limitations of AsteroidOS on the TicWatch E & S. The following table should summarize the current support of this watch:


You can report any hardware support issue here. Use the label mooneye for issues specific to your watch.


Download AsteroidOS nightly builds

Store the files in your "Downloads" folder so the later commands work

asteroid-image-mooneye.ext4 zImage-dtb-mooneye.fastboot

Install ADB & Fastboot

On Linux systems with apt package manager

sudo apt install android-tools-adb android-tools-fastboot

On Windows systems install this ADB driver from clockworkmod


Download this zip file containing ADB & Fastboot from Android SDK

Extract the content to a folder of your liking.
Navigate to that folder using Windows commandline (cmd.exe).


1. Unlock your bootloader

Installing AsteroidOS requires an unlocked bootloader. Accessing the bootloader can be achieved via ADB in Wear OS, as described in steps 1.1 to 1.4 below.
You can skip these steps if you are familiar with the manual method to access the bootloader. This might need some practice and timing. Hold down the power until the watch reboots. When the MOBVOI logo appears, quickly slide on the screen from the upper left corner to the lower right corner.

Enable ADB on your watch with the following steps:
  1. Open the settings app and go to the "About" page.
  2. Tap the Build number 7 times until Developer options become enabled.
  3. Go back to the settings menu and then to the "Developer options" page.
  4. Enable ADB debugging.

Finally, to unlock the bootloader enter the following commands in a terminal with your watch connected:
adb reboot bootloader
fastboot oem unlock
Follow the instructions on your watch's screen. Please note it may void your warranty.

2. Flash and boot AsteroidOS

Only temporary installation supported

On most watches, you can decide if you want to replace Wear OS definitively or try AsteroidOS as a dual-boot. On the TicWatch E & S the real installation is not supported and you can only try AsteroidOS as a dual-boot using the temporary installation method.

  1. Temporary installation
  2. Reboot to Wear OS, re-enable developer mode and ADB debugging.
    Push AsteroidOS to the internal sdcard using Linux:
    adb push -p ~/Downloads/asteroid-image-mooneye.ext4 /sdcard/asteroidos.ext4
    or using Windows:
    adb push -p %systemdrive%%homepath%\Downloads\asteroid-image-mooneye.ext4 /sdcard/asteroidos.ext4
    Everytime you want to reboot AsteroidOS from Wear OS, run:
    adb reboot bootloader
    Then, if you are using Linux:
    fastboot boot ~/Downloads/zImage-dtb-mooneye.fastboot
    or on Windows:
    fastboot boot %systemdrive%%homepath%\Downloads\zImage-dtb-mooneye.fastboot

3. Enjoy your new OS!