It’s actually using https://github.com/riccardobl/nostrduino by nostr:npub1klt4m7gsqtx0e5erq9snquk8g2sw79mwm6kjau02nufnny99pcysd4kr0p which is loosely based on nostr:npub1dqepr0g4t3ahvnjtnxazvws4rkqjpxl854n29wcew8wph0fmw90qlsmmgt ‘s lib though :)