INGA IN GA Inexpe pensive No Node f for G General Appl - PowerPoint PPT Presentation

Institute of Operating Systems and Computer Networks Platzhalter für Bild, Bild auf Titelfolie hinter das Logo einsetzen Architecture and Evaluation of INGA IN GA – Inexpe pensive No Node f for G General Appl plicati tions Felix lix Büs Büsching ing, Ulf Kulau, Lars Wolf

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What hat are are we we deali aling wi with th in G German rmany? y? 2005 2050 1910 Felix Büsching | INGA – Inexpensive Node for General Applications 4 / 23 Institute of Operating Systems and Computer Networks

What hat the the he hell ll is is GAL? AL? German Project “GAL” G estaltung A ltergerechter L ebenswelten “Design of Environments for Aging”  Research project  Funded by the state of Lower Saxony  Interdisciplinary approach Felix Büsching | INGA – Inexpensive Node for General Applications 5 / 23 Institute of Operating Systems and Computer Networks

Use Ca se Cases ses / S / Scen cenarios Exem xemplar ary y Assi ssist sting Syst ystem ems 1. Personal activity and household assistant 2. Monitoring of sports activities in prevention and rehabilitation 3. Sensor-based activity determination 4. Sensor-based fall prevention and fall recognition Felix Büsching | INGA – Inexpensive Node for General Applications 6 / 23 Institute of Operating Systems and Computer Networks

Bod ody Are y Area a Network twork - Mon onitor tor Ac Acti tivi vity ty of of Eld lderly rly Peop ople le Body Area Network Detect Falls Monitor Gait Determine Activity  Activity data gathered from various sensors  Accelerometer (3 axis)  Gyroscope (3 axis)  Pressure Sensor  Nobody did this in combination, yet… Felix Büsching | INGA – Inexpensive Node for General Applications 7 / 23 Institute of Operating Systems and Computer Networks

Relate lated Pr Product ducts: s: Freesca eescale RD3 D315 152MMA MMA72 7260Q Freescale RD3152MMA7260Q: Wireless Sensing Triple Axis Reference Design (ZSTAR)  Microprocessor: MC9S08QG8  512 Bytes RAM  8 KBytes FLASH  Transceiver: MC1319x  No SD-Card Slot  Accelerometer: MMA7260QT  Only sensor  Price: 111 €  No longer manufactured Felix Büsching | INGA – Inexpensive Node for General Applications 8 / 23 Institute of Operating Systems and Computer Networks

Relate lated Pr Product ducts: s: Shi himme mmer Se Sens nsor Shimmer Sensor  Texas Instruments MSP430F1611  RAM: 10KB  Flash: 48KB  IEEE802.15.4 cc2420 Transceiver  Bluetooth RN-42  SD Card Slot  Accelerometer: Freescale MMA7361  Price: 199 € (basic variant),  + 219 € (kinematic daugtherboard)  + 199 € (programming unit)  No Pressure sensor available Felix Büsching | INGA – Inexpensive Node for General Applications 9 / 23 Institute of Operating Systems and Computer Networks

Relate lated Pr Product ducts: s: Sen enseW seWea ear Armb Armban and Commercial Product  No technical information available  2-axis Accelerometer, 32 Hz sampling rate  + Temperature Sensor  + Galvanic Skin Response  Proprietary wireless connection  Battery-Power: „up to 7 days“  Memory: „up to 14 Days recording“  Price: starting from 1.023,40 € Felix Büsching | INGA – Inexpensive Node for General Applications 10 / 23 Institute of Operating Systems and Computer Networks

Bod ody Are y Area a Network twork - Mon onitor tor Ac Acti tivi vity ty of of eld lderly rly peop ople le Body Area Network Detect Falls, Monitor Gait  Activity data gathered from various sensors  Accelerometer  Gyroscope  Pressure Sensor No existing nodes fulfilled the requirements  Combine advantages from existing ones  Build a “new” sensor node  INGA  Inexpensive Node for general Applications Felix Büsching | INGA – Inexpensive Node for General Applications 11 / 23 Institute of Operating Systems and Computer Networks

Arc Archi hite tectu ture re of of INGA  Based on ATmega 1284p MCU  Atmel AT86RF231 RF-Transceiver, printed PCB antenna  2.4 GHz, IEEE802.15.4 / ZigBee, Hardware AES  USB / UART (FTDI) for programming Felix Büsching | INGA – Inexpensive Node for General Applications 12 / 23 Institute of Operating Systems and Computer Networks

Arc Archi hite tectu ture re of of INGA  Li+ charger for Li-Ion or Li-Po battery  Power monitoring (voltage and current)  User switch and user LEDs  Pin headers (2.54 mm) for all relevant signals and busses Felix Büsching | INGA – Inexpensive Node for General Applications 13 / 23 Institute of Operating Systems and Computer Networks

I² I²C C Bus: Bus: Gyrosco scope Gyroscope L3G4200D (ST Microelectronics)  3 axis digital, 16 bit resolution  Up to 2000 ° per second  Integrated temperature sensor (8 bit) Felix Büsching | INGA – Inexpensive Node for General Applications 14 / 23 Institute of Operating Systems and Computer Networks

I² I²C C Bus: Bus: Air Pr Pressur essure e Sen enso sor Pressure Sensor BMP085 (Bosch)  Resolution of 0.01 hPa (16 – 19 bit)  Accuracy of 0.2 hPa  Included temperature sensor (16 bit) Felix Büsching | INGA – Inexpensive Node for General Applications 15 / 23 Institute of Operating Systems and Computer Networks

(M (M)S )SPI PI-Bus: F Flas lash M h Memory mory an and Demu multi ltiple lexe xer 1-of-8 Demultiplexer  3 I/O-lines for up to 7 devices on MSPI bus Flash Memory AT45DBxx1 (Atmel)  dual buffer interface  8 to 32 Mbit capacity Felix Büsching | INGA – Inexpensive Node for General Applications 16 / 23 Institute of Operating Systems and Computer Networks

(M (M)S )SPI PI-Bus: Bus: Accel cceler eromet eter er Accelerometer ADXL345 (Analog Devices)  3 axis digital  2g, 4g, 8g and 16g at 10 to 13 bit  Up to 3.2kHz sampling rate Felix Büsching | INGA – Inexpensive Node for General Applications 17 / 23 Institute of Operating Systems and Computer Networks

(M (M)S )SPI PI-Bus: Bus: Micr cro-SD C Card ard Socket for Micro-SD Card  Operation via SPI-Mode (slow, but sufficient)  Disconnect all lines via Tri-State-Buffer  No power drain through signal lines Felix Büsching | INGA – Inexpensive Node for General Applications 18 / 23 Institute of Operating Systems and Computer Networks

Exe xemp mplary E lary Evalu valuati ation on: I INGA A vs vs. TM TMote ote Sky y – UD UDP Throu Throughp hput Felix Büsching | INGA – Inexpensive Node for General Applications 19 / 23 Institute of Operating Systems and Computer Networks

Exe xemp mplary E lary Evalu valuati ation on: I INGA A vs vs. TM TMote ote Sky y – Powe ower C r Con onsump mpti tion on  Power consumption depends on what you do  All sensors can be set to power saving states INGA TMote Sky I cc 18.69 mA 19.69 mA Max. transmit rate 125.98 Kbit/s 90.91 Kbit/s Electric Charge 0.15 mAs per bit 0.22 mAs per bit Felix Büsching | INGA – Inexpensive Node for General Applications 20 / 23 Institute of Operating Systems and Computer Networks

Exe xemp mplary E lary Evalu valuati ation on: M Memory mory Ac Access Felix Büsching | INGA – Inexpensive Node for General Applications 21 / 23 Institute of Operating Systems and Computer Networks

Curre rrent t State tate & & On Ongoi oing Work ork 150 INGA devices built  Student lab – very interesting projects Field study “Activity Monitoring”  Begins in a few months Operating System Support  Contiki  TinyOS  WiseLib Felix Büsching | INGA – Inexpensive Node for General Applications 22 / 23 Institute of Operating Systems and Computer Networks

Institute of Operating Systems Summary an mmary and C Con onclu lusion on and Computer Networks INGA is  Open Source  Cheap and easy to expand  Running Contiki and TinyOS out of the box Use it:  http://www.ibr.cs.tu-bs.de/projects/inga/ Thanks for the attention! Felix Büsching buesching@ibr.cs.tu-bs.de Felix Büsching | INGA – Inexpensive Node for General Applications 23 / 23 Institute of Operating Systems and Computer Networks