Transcript Plant Care Sensor

Mote Network
Waylon Brunette
Jason Jenks
OVERVIEW
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Obtains sensor readings about the plant and
mote’s current state.
Data packets will be sent over the RFM to a
base station (another mote) that forwards
packets to a computer.
Power is a precious commodity, so
conservation is a major goal
Convert the system from a routing network to
a beacon network, routing to be handled by
hubs (Changed due to localization needs)
Overview of Plant Care
Rene Motes
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The Berkeley RENE Motes are
programmed with TinyOS.
Sensor data is collected using the ADC
of the atmel AT90LS8535 chip (on the
mote)
RFM transmistter
UART to communicate with serial port
Sensors
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photo resistor
thermistor
Irrometer (moisture sensor)
an inductively rechargeable power source
Goals Achieved
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Completed programming for the
hardware that controls sensors for
monitoring plants.
Re-implemented an new ACK system
with sequence numbers.
Removed routing system, and replaced
with a beacon system
Integrated hardware
Networking
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Run length encoding is used to store
the information until there is enough
information to fill up a data packet.
Added an ack system to ensure data
delivery
Power
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Power conservation methods
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Run length encoding of data
Turning off the irrometer when not in use
Power down of RFM when not in use (has
problems with TinyOS)
Difficulties
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The Localization research team requested a
redesign of the message and network system
with one week left to the due date.
Power on Reset does not work properly
Hardware arrived late for integration testing
RFM Power down is appears to have bugs in
its TinyOS implementation.
Thanks To
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Intel Research, Seattle staff
Especially the following:
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David Koizumi (with assistance from Howard at Intel,
Portland)
Anthony LaMarca