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Telos
Ultra low power IEEE 802.15.4 compliant wireless sensor module
Revision B : Humidity, Light, and Temperature sensors with USB
Product Description
Telos is an ultra low power wireless module
for use in sensor networks, monitoring
applications, and rapid application
prototyping. Telos leverages industry
standards like USB and IEEE 802.15.4 to
interoperate seamlessly with other devices.
By using industry standards, integrating
humidity, temperature, and light sensors,
and providing flexible interconnection with
peripherals, Telos enables a wide range of
mesh network applications. Telos Revision B is a drop-in replacement for Moteiv's successful
Revision A design. Revision B includes increased performance, functionality, and expansion.
With TinyOS support out-of-the-box, Telos leverages emerging wireless protocols and the open
source software movement. Telos is part of a line of modules featuring on-board sensors to
increase robustness while decreasing cost and package size.
Key Features
•
250kbps 2.4GHz IEEE 802.15.4 Chipcon Wireless Transceiver
•
Interoperability with other IEEE 802.15.4 devices
•
8MHz Texas Instruments MSP430 microcontroller (10k RAM, 48k Flash)
•
Integrated ADC, DAC, Supply Voltage Supervisor, and DMA Controller
•
Integrated onboard antenna with 50m range indoors / 125m range outdoors
•
Integrated Humidity, Temperature, and Light sensors
•
Ultra low current consumption
•
Fast wakeup from sleep (<6µs)
•
Hardware link-layer encryption and authentication
•
Programming and data collection via USB
•
16-pin expansion support and optional SMA antenna connector
•
TinyOS support : mesh networking and communication implementation
Moteiv Corporation
Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004)
Rev B (Low Power Wireless Sensor Module)
Telos
Page 1 of 28
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Table of Contents
Summary of Contents for moteiv Telos
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Page 1: Product Description
Revision A design. Revision B includes increased performance, functionality, and expansion. With TinyOS support out-of-the-box, Telos leverages emerging wireless protocols and the open source software movement. Telos is part of a line of modules featuring on-board sensors to increase robustness while decreasing cost and package size. -
Page 2: Table Of Contents
Humidity/Temperature Sensor ....................21 Light Sensors ........................22 Expansion Connector......................23 Internal Temperature and Voltage Monitoring..............25 General Information ........................26 Document History........................26 Product Status Definitions....................26 Disclaimer ...........................27 Address Information ......................28 Headquarters ........................28 Moteiv Corporation Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004) Page 2 of 28... -
Page 3: Module Description
Telos Rev B (Low Power Wireless Sensor Module) Module Description The Telos module is a low power “mote” with integrated sensors, radio, antenna, microcontroller, and programming capabilities. Humidity Humidity Photosynthetically Photosynthetically Temperature Temperature Active Radiation Active Radiation Sensor Sensor Sensor... -
Page 4: Power
Rev B (Low Power Wireless Sensor Module) Power Telos may be powered by two AA batteries. The module was designed to fit the two AA battery form factor. AA cells may be used in the operating range of 2.1 to 3.6V DC, however the voltage must be at least 2.7V when programming the microcontroller flash or external flash. -
Page 5: Mechanical Characteristics
Pin 1 of 6-pin 0.1in rect IDC connector 2.139 0.909 Ø 0.034 Pin 1 of 8-pin 2mm rect JTAG connector Figure 2 : Physical dimensions of Telos Revision B. All units are in inches unless otherwise noted. UNIT Width 1.24 1.26... -
Page 6: Block Diagram
RX/TX RTS/DTR ST Flash 1024k (2.7V) USB 2.0 Write Protection JTAG UART/RS232 Functionality Figure 3 : Functional Block Diagram of the Telos Module, its components, and buses Moteiv Corporation Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004) Page 6 of 28... -
Page 7: Schematic
Telos Rev B (Low Power Wireless Sensor Module) Schematic " 1 < Moteiv Corporation Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004) Page 7 of 28... - Page 8 Telos Rev B (Low Power Wireless Sensor Module) Figure 4 : Schematics for the Telos module (Rev B) Moteiv Corporation Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004) Page 8 of 28...
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Page 9: Microprocessor
Microprocessor Description The low power operation of the Telos module is due to the ultra low power Texas Instruments MSP430 F1611 microcontroller featuring 10kB of RAM, 48kB of flash, and 128B of information storage. This 16-bit RISC processor features extremely low active and sleep current consumption that permits Telos to run for years on a single pair of AA batteries. -
Page 10: Programming
Rev B (Low Power Wireless Sensor Module) Figure 5 : Device Manager showing Telos installed as COM6 The motelist command line utility lists all of the Telos motes currently connected to a computer. This utility optionally lists previously connected motes that the system has cached. - Page 11 > make telosb install.x bsl,n Where x is the 16-bit address assigned to the mote and n is the COM port that Telos is currently using. Note that not including “bsl” or “bsl,n” will program automatically using the bsl to the first Telos mote found on the USB bus using the motelist command.
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Page 12: Block Diagram
CC2420 Radio Interrupts & SPI UART via USB Figure 6 : Block diagram of the TI MSP430 microcontroller and its connection to other peripherals in the Telos module Moteiv Corporation Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004) Page 12 of 28... -
Page 13: Radio
Radio Description Telos features the Chipcon CC2420 radio for wireless communications. The CC2420 is an IEEE 802.15.4 compliant radio providing the PHY and some MAC functions. With sensitivity exceeding the IEEE 802.15.4 specification and low power operation, the CC2420 provides reliable wireless communication. -
Page 14: Typical Operating Conditions
µs Measured Output Power The RF output power of the Telos module from the CC2420 radio is shown in Figure 9. For this test, the Telos module is transmitting at 2.405GHz (IEEE 802.15.4 channel 11) using the O- QPSK modulation with DSSS. The CC2420 programmed output power is set to 0 dBm. The measured output power of the entire modulated spectrum is 2.4 dBm. -
Page 15: Antenna
Rev B (Low Power Wireless Sensor Module) Antenna Telos has two antenna options—and internal antenna built into the module and an external SMA connector for connecting to external antennas. By default, Telos is shipped with the internal antenna enabled. If an application requires an external antenna or a different directional pattern than the internal antenna, an SMA connector may be installed and an antenna may be connected directly to Telos’... -
Page 16: Internal Antenna Without Battery Pack
2.45 2.475 2.525 2.55 START 2.3GHz [ 10.00 dBm] STOP 2.55GHz Frequency (GHz) Figure 12 : S11 measurements for the internal inverted-F antenna with battery pack underneath Moteiv Corporation Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004) Page 16 of 28... -
Page 17: Radiation Pattern
Figure 13 : Radiated pattern of the Inverted-F antenna with horizontal mounting (from Chipcon AS) Figure 14 : Radiated pattern of the Inverted-F antenna with vertical mounting (from Chipcon AS) Moteiv Corporation Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004) Page 17 of 28... -
Page 18: Sma Connector
SMA Connector The SMA connector is a surface mount female coax connector for attaching an external antenna. The default Telos configuration does not include the SMA connector. The connector may be purchased separately from Digikey (http://www.digikey.com). The manufacturer’s part number is 901-144 from Amphenol RF (Digikey part number ARF1205-ND). -
Page 19: External Flash
Rev B (Low Power Wireless Sensor Module) External Flash Telos Revision B uses the ST M25P80 40MHz serial code flash for external data and code storage. The flash holds 1024kB of data and is decomposed into 16 segments, each 64kB in size. -
Page 20: Flash Hardware Write Protection
USB and the write protect bit is cleared. Telos ships with sector 15 (the upper sixteenth sector) write protected and the SRWD bit set. In sector 15 is the “Golden Image” and factor metadata. The “Golden Image” is a factory program image that includes network reprogramming so that Telos may always return to a known good state, even if loaded with a malfunctioning program image. -
Page 21: Sensors
Humidity/Temperature Sensor The optional humidity/temperature sensor is manufactured by Sensirion AG. The SHT11 and SHT15 models may be directly mounted on the Telos module in the U3 component position. The SHT11/SHT15 sensors are calibrated and produce a digital output. The calibration coefficients are stored in the sensor’s onboard EEPROM. -
Page 22: Light Sensors
Telos Rev B (Low Power Wireless Sensor Module) Light Sensors A variety of light sensors may be used with Telos. Telos (rev A) has connections for two photodiodes. Moteiv currently uses photodiodes from Hamamatsu Corporation (http://www.hamamatsu.com) If your mote is populated with light photodiodes, the default diodes are the S1087 for sensing... -
Page 23: Expansion Connector
(analog sensors, LCD displays, and digital peripherals) may be controlled by the Telos module. On the far side of the board from the USB connector is a 10-pin IDC header at position U2 and a 6-pin IDC header at U28. The 10-pin connector has the same connections as Telos Revision A and is the primary connector. - Page 24 R16 must be populated with a 0 ohm resistor to enable GIO1. R14 and R16 are located on the top side of Telos between the USB controller and the radio. NOTE: When R14/R16 is populated (GIO0/GIO1 enabled), ADC3/ADC2 will not provide reliable readings if an application reverts to using the ADC input instead of the digital I/O port input on the microcontroller.
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Page 25: Internal Temperature And Voltage Monitoring
–50 Figure 25 : Typical response of the internal temperature sensor. Results vary and the sensor should be calibrated for most applications. Response curve from Texas Instruments. Moteiv Corporation Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004) Page 25 of 28... -
Page 26: General Information
This data sheet contains preliminary data, and samples or first supplementary data will be published at a later production date. Moteiv reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. No Identification Noted Full production This data sheet contains the final specifications. -
Page 27: Disclaimer
Moteiv Corporation customers using or selling products for use in such applications do so at their own risk and agree to fully indemnify Moteiv Corporation for any damages resulting from improper use or sale. -
Page 28: Address Information
E-mail: info@moteiv.com Technical Support E-mail: support@moteiv.com Phone Number: +1.510.965.1312 Fax Number: +1.510.295.2411 Headquarters Moteiv Corporation 7224 View Ave El Cerrito, CA 94530 © 2004 Moteiv Corporation Moteiv Corporation Telos (Rev B) : PRELIMINARY Datasheet (12/5/2004) Page 28 of 28...