Bitcoin is the money for the people, it is inclusive money. No one can can be excluded from the network for any reason. It's also great to run in very cheap and low power hardware.

A Bitcoin full node with Lightning Network runs in a Raspberry Pi, I have one running in a Raspberry Pi3.

Lightning Network will push Bitcoin to the next level. No more expensive transactions, no more slow transactions. Lightning Network will revolutionise the micro-transactions paradigm.

With cheap hardware like a M5-Stack (ESP32 modular development board) it's possible to implement interesting concepts integrating Lightning Network payments.

Hardware: M5 Stack, with a relay module.

The software was a mix of the very interesting M5ez interface builder for M5-Stack, with the tutorials of the developer @BTCSocialist (https://twitter.com/BTCSocialist).

For this project I used the Opennode API, however it is also possible (and easy to implement) the connection to our own Bitcoin full node.

Here is a video of the final result:

You can find the source code here: https://github.com/pepinto/M5-Lightning .

I hope you like.

Cheers.