1. opensensor Part 4 Opensensor details
Frank H.P. Fitzek
Anders Grauballe
Gian Paolo Perrucci
Ben Kroeger
Aalborg University
Stephan Rein
Technical University of Berlin

2. overview Opensensor specification Opensensor functionality Timer
Digital/analog ports
UART
SPI - nRF
Opensensor interfaces
Serial interface
Opensensor debug and test
SPI (nRF905) interface
Bluetooth interface (next time)

3. opensensor details Opensensor specification
Microchip dsPIC30f3013 processor
16 bit architecture
C compiler optimized instruction set
24KB program memory
2KB RAM
20 I/O pins
2 UART interfaces
SPI interface
Timers 3 x 16-bit 1 x 32-bit
Red and Green LED
Low power consumption

4. opensensor details Timers can be used for Digital analog ports Timing
Timeouts
Sleep functions
Pulse-width modulation PWM
Etc.
Digital analog ports
Most ports can be configured to either input or output
Measurements of environmental conditions
Controller for third party systems e.g. home control systems

5. opensensor details
UART
Standard RS232 interface
Bluetooth interface

6. opensensor details Open sensor interfaces
Serial interface for wired connection with a PC
Easy debugging while programming
Implements command interface for the opensensor
Can be accessed via a terminal program e.g. Hyper Terminal, Cutecom etc.
Program is provided on the website as well as instructions on how to use it

7. opensensor details SPI – nRF905
Operating frequencies: 433/868 or 915MHz
Gaussian frequency shift keying
Power settings
Output power: -10dBm, -2dBm, 6dBm or 10dBm
RX reduced power mode -85dBm
Carrier detect
Address match
Auto retransmit

8. opensensor details Opensensor interfaces
SPI interface with the nRF905 chip to establish communication between more opensonsers
MAC protocol can be implemented
Low power consumption and cost

9. contact opensensor@es.aau.dk
Frank H.P. Fitzek
Anders Grauballe
Gian Paolo Perrucci
Ben Kroeger
Aalborg University
Stephan Rein
Technical University of Berlin

10. publication
F.H.P. Fitzek and F. Reichert. Mobile Phone Programming and its Application to Wireless Networking Springer.