In Wireless Sensor Network, some nodes are too far from the sink base. The data has to travel through the nodes kept in different place to reach the final destination. Hence wireless networks are used for the sensor network. Ultra low power wireless Tmote sky module is used in monitoring applications, sensor networks and rapid application prototyping. Tmote sky uses industry standards, integrating temperature, humidity, and light sensors and interconnection with peripherals to enable a wide range of mesh network application.
Tmote sky module was used to make the successful Moteiv’s Telos design. The module has increased functionality, performance and expansion. Tmote sky module is one of the modules in on-board sensors used in increasing the robustness and decreasing the cost and size.
Below are The Features of The Module:
- Interoperability with other devices like IEEE 802.15.4
- 8MHz Texas Instruments MSP430 microcontroller of10k RAM and 48k Flash
- Integrated Supply Voltage Supervisor, ADC, DAC, and DMA Controller
- Speed 250kbps 2.4GHz IEEE 802.15.4 Chipcon Transceiver
- onboard antenna
- Integrated Temperature, Humidity, and Light sensors etc
- Ultra low power consumption
- Fast wakeup from sleep mode
- Encrypted with Hardware link-layer and authenticated
- Used in Programming and data collection via USB
- 6-pin expansion support and has SMA antenna connector(optional)
- TinyOS supports mesh network and communication implementation
- Complies with FCC Part 15 and under Industry Canada regulations
- Environmentally friendly which complies with RoHS regulations
Module consists of the following in front:
- USB connector
- USB Transmit LED
- User Button
- Reset Button
- 6-pin expansion connector
- 10-pin expansion connector
- Internal Antenna
- USB Receive LED
- LEDs
- JTAG Connector
- USB Microcontroller
- Digital Switch Isolates USB from microcontroller
- CC2420 Radio
Below are the optional sensors used:
- Active Radiation Sensor
- Solar Radiation Sensor
- Temperature Humidity Sensor
- SMA Antenna Connector
Following are at the back of the module:
- 2-pin SVS connector
- Instruments microcontroller
- 48-bit silicon serial ID
- USB Flash (2kB)
- 32 kHz oscillator
- ST code Flash (1MB)
Tmote sky module can be operated with the help of two AA batteries. If the module is plugged to USB port for computing or programming then it would receive from the computer. When plugged to USB the voltage required to operate the Tmote is 3V. Battery pack is not necessary when the module is attached to USB port.At any cost voltage for operating the module should not exceed 3.6V as it would cause damage to radio, microcontroller, and other components.
Modules are available in various sizes with width max 1.29 and Min 1.24 Inches, Height Max (without SMA antenna and battery pack) Max 0.27 and Min 0.24 inches and Length Max 2.60 and Min 2.55 inches.
Internal Inverted-F microstrip antenna may attain up to 125 meter range outdoors and 50 meter range indoor.
Temperature/Humidity sensor in Tmote Sky module is manufactured by Sensiron AG, which is produced using CMOS process and combined with 14-bit A/D convertor.
Telsob mote platform act as a experiment cutting edge for the research community. The platform is integrated with antenna, has extended memory, and also a optional sensor suite. This platform consume low power as it is mostly in sleep mode and the wake up time is very fast and back to the sleep mode once the process is done. It is possible to operate with two AA batteries or when connected to the PC or laptop it uses the power from PC. If it is connected to the USB port of PC battery pack is not necessary.
The device has the capability to interact with the additional devices. Telsob platform is developed and contributed to the research community by UC Berkeley.
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