I also have bipolar, and use this to track my mood. The macro pad that I used is from Aliexpress and lets you program each button to act out a series of keystrokes. I made an AutoHotkey script that converts those keystrokes to a mood rating link, which I keep track with Obsidian (a markdown text editor/knowledge management system).

This is the AutHotkey code I use.

This is an example of it working

From there, you can look at the backlinks of each mood rating to see the dates and times where you had those moods. Useful to see the trends in my highs vs lows.