Nice solution. Also that is a very compact (tested and safe) 220V ac -> 19V DC converter inside... hm...

@hek Accordingly to LowPower library documentation, library support Atmega32U4 processor, so should work on Leonardo. Look's like i need to investigate deeper.

Hi @doctor64 , How did you solve the battery reporting? Did you implement the changes in h and cpp file from the link and compiled/uploaded the gateway sketch again?