Arduino (Devices StandardFirmata 2.x)
IO (Devices BMC meM-PIO)
IO (Devices Wiesemann+Theis Digital-EA)
...and many more
The easiest way to get data from sensors into vvvv is to use an Arduino board. But of course any other IO board is welcome:
Arduino Boards (dedicated node in the addonpack)
Phidgets (dedicated nodes in the addonpack)
Wearable FLORA (Arduino-compatible)
Wearable Lilypad (Arduino-compatible)
Wiesemann+Theis Interfaces (dedicated node)
[www.bmcm.de/us/pr-usb-pio.html|BMC USB-PIO Cable] (dedicated node)
IO-Warrior (dedicated node)
Cinetix RS-232 Sensorbox (dedicated node)
For many devices and boards you can use a bare RS232 (Devices) to talk to them.
As a side note check the How To RS232.
Examples in your vvvv\girlpower\ directory: