I can make a transmitter with a chip that works with Bolt Cards that you can insert into your device. It will be about the size of a 10 baht coin as shown in the picture.
https://image.nostr.build/936cf65aa15b94fa9635727ac164770a5da054e75528304bcece67b49ab43430.jpg
 

 @supasit aui maybe we can think about making something together? Would be awesome a Nostr or BitPopArt Boltcard 

 "Oh, thank you very much! I'm studying it as well and currently testing it out. I'll update you on the progress if I get any results."

 

 Cool would be nice to make something like this 🙏