ETH Sensor Buttons

Autonomous sensor button

Specification

• 4 MHz 16-bit MSP430F1611 micro-controller (Texas Instruments)
• 48 KB Flash program memory
• 256 bytes Flash data memory
• 10 KB data RAM
• Battery: lithium-ion, 130mAh, 3.7V (LPP402025, Varta)
• 32KHz external clock feeding a digitally controlled oscillator at 4 MHz
• Wireless 1Mbps 2.4GHz transceiver (nRF2401E, Nordic Semiconductors)
• 3 axis accelerometer (LIS3L03AQ, ST Microelectronics)
• Light sensor (SFH3410, OSRAM)
• Microphone (SPO1013, Knowles Acoustic)
• JTAG programming interface
• Serial line for data communication
• Physical characteristics: 31mm diameter, 11mm thickness, 12g weight

Use in wearIT@work project

The usage of this hardware is planned for segmenting motion data in different context detection scenarios. Potential exploitation in: Skoda, EADS pilot.

Status

The sensor button has been developed and produced at ETH Zurich. It is used in different projects to evaluate the trade-offs between power consuption and recognition rate of given activities.

Maturity Level (?)