Arduino - Missing File 'LowPower.h'

[TGit-Tech]

While trying to use this library on an Arduino UNO with Arduino 1.8.3 IDE.

Took a while to find out this missing dependency had a link in the MqttsnClient.cpp file on line #223 //https://github.com/LowPowerLab/LowPower.

Might consider adding the dependency to the instructions :)

Also, it seems there's a reference to 'using namespace std' - of which I'm thinking requires another outside library.

I ended up with compile error ->

C:\Users\<username>\AppData\Local\Temp\ccU2dsiN.ltrans2.ltrans.o: In function `Print::print(__FlashStringHelper const*) [clone .constprop.26]':

C:\Users\<username>\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.6.20\cores\arduino/Print.cpp:51: undefined reference to `debug'

Before, I gave up and decided to go back to the Synchronous MQTT-SN code which compiled without errors.