I build my first POS device.

It is a lillygo board wit keypad. The case i printed on my 3D printer!

You can find a good guide here:

https://ereignishorizont.xyz/lnpos/en/

Its all only possible because the #LNbits team! special thanks to them.

https://github.com/arcbtc/LNURLPoS

Now a store could receive LN bitcoin without being connected to the internet.