Only God knows why Android doesn't have Thai keyboard layouts installed. Nevertheless this tiny tool adds Thai keyboard layouts to your Android devices. Now you can type Thai from any physical keyboards: Bluetooth or USB keyboard.

No visible app to cluster your devices. Only what your device needs keyboard layout which you can select in Physical Keyboard section.

This includes both Kedmanee and Pattachote layout.

Please check out YouTube for how to enable Thai layout for your keyboard https://youtu.be/iUze_2-IIw4