CPU core is fully utilized after calling Firmate.begin()

[Qowy]

Due to the constantly polling nature of the inputThread() listening for messages from the serial connection one CPU core is fully utilized during the entire runtime of the Firmata class.

#113 proposes a simple optional fix that allows one to specifiy a polling intervall during constuction of the UwpFirmata class.

#115 Is a nicer solution but requires a change to Microsoft.Maker.Serial.ISerial (ms-iot/serial-wiring#20) that introduces (in order to not change existing functionality) a readBlocking() method that puts the current thread to sleep until LoadAsync() is complete

I also experimented with a solution that exposes ISerial::available() and read() (or would introduce availableAsync() etc.) as IAsyncOperation<uint16_t>,
however this would require even more changes to the ISerial interface and is complex to do with the create_task().then() approach.

co_await might make it easy, but I am unsure if using #include <experimental\resumable> is allowed in such a low level library

[saraclay]

If this issue is still relevant, please file this at: https://github.com/MicrosoftDocs/windows-iotcore-docs