Hmm. I'm going to try this: https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=59420 Seems like I need to solder the pins 25 & 26 together on the USB chip of the Nano. Now my Duemilanove is failing to connect on boot as well...

OK, issue reported: https://github.com/NodeBB/nodebb-theme-persona/issues/244

I made a pull request. The sketch GatewaySerial.ino now sets the serial speed to 38400 if the Arduino is running on 8MHz clock speed. https://github.com/mysensors/Arduino/pull/391 EDIT: My pull request was accepted into the Domoticz master branch :)