Tinynode
The most important element of the project infrastructure is the nodes which should implement the wireless communication to the sensors. We want to use materiel which supports TinyOS and have a low consumption. Tinynode 584 with its extension board manufactured by Shockfish matches exactly our needs. The microcontroller is an MSP430F1611 (Texas Instrument) with 10 kB of RAM, 48 kB of flash and 128 B of memory. The CPU is a low power 16-bit RISC with 16 bit register. Wireless transceiver: Xemic XE1205 with the following key features: RF output power up to 15 dBm (programmable), high sensibility down to -121 dBm at 1.2 kbit/s, bit rate up to 152.3 kbit/s, continuous phase 2-level modulation, operate in the 433, 868 and 915 MHz (but tinynode 584 only use the 868), low-consumption and many other useful features as RSSI (Received Signal Strength Indicator). Furthermore, this material is optimized to run TinyOS and is based on an ultra low power 3 V design. The interface RS-232 and Jtag (principally used for debugging) are present on the extension board.
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