am 29470362: am 7d23080f: am 8af10fb9: am 7b12399f: It turns out that the Arduino serial port char buffer is only 500 bytes, so message size has to be < 500 or else data is lost. This change bumps it down to 128 bytes which should still be big enough. This also has a 

Merge commit '29470362de51f3df085a8ef59aadef9539392f13'

* commit '29470362de51f3df085a8ef59aadef9539392f13':
  It turns out that the Arduino serial port char buffer is only 500 bytes, so