μPnP: Plug-‐and-‐Play Peripherals for the Internet-‐of-‐Things
Fan Yang, Nelson MaIhys, Rafael Bachiller, Sam Michiels, Wouter Joosen, Danny Hughes iMinds-‐DistriNet, KU Leuven, Leuven, B-‐3001, Belgium [email protected] MOTIVATION
Conven5onal Plug-‐and-‐Play peripheral integra5on is infeasible for resource-‐
constrained Internet-‐of-‐Things devices: §  Mainstream approaches like USB are power-‐hungry and have too much soYware overhead §  Peripheral drivers are mostly pla;orm-‐speciﬁc import uart;
§  Tradi5onal discovery protocols are heavyweight uint8_t idx, rfid[12];
bool busy;
OUR APPROACH
event init():
# 9600 baud, no parity, 1 stop bit, 8 data bits
signal uart.init(9600, USART_PARITY_NONE,
USART_STOP_BITS_1, USART_DATA_BITS_8);
idx = 0;
busy = false;
1. Low-‐cost, low-‐power peripheral iden5ﬁca5on based on on passive electrical characteris5cs
event destroy():
# restore uart to platform defaults
signal uart.reset();
2. Pla;orm-‐independent, compact and over-‐the-‐air deployable drivers
event read():
if !busy:
busy = true;
signal uart.read(); # initiate read operation
3. Remote peripheral discovery and usage via standard IPv6 mul5cast Example driver code of a UART-based RFID
networking
card reader.
CURRENT PROTOTYPE AND PERFORMANCE
§  Ultra-‐low power consump5on (6 orders of magnitude lower than USB) §  Easy driver language (-‐50% Code, -‐90% RAM) §  IPv6 Mul5cast discovery (in 2KB of ROM) §  Extremely low cost (< 1¢ per peripheral) §  Tiny memory footprint (< 10% of AVR/ATMega128) NEXT STEPS
§  New testbed with 100 nodes §  Global ID management §  Secure driver deployment
§  Smaller and cheaper hardware
Funded by:
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http://www.micropnp.com/