Microchip Technology Humidity Sensor PICtail Bedienungsanleitung Seite 1

Nano to ZeroImplementing a Low-Power Wireless Sensor Node With Zero Sleep Powerwww.powercastco.com©2010 Powercast Corporationwww.microchip.com©2010

P2110 System Voltage Regulated Output Voltage3.3V0VRESETCapacitor VoltageVMINRESETVMAXwww.powercastco.com©2010 Powercast Corporationwww.microchip.com

Powercaster™ Transmitter• 915 MHz center freq.• DSSS modulation• 3 Watts EIRP• ~60° energy pattern•Data broadcast6.25” width6.75”heightwww.powercastco

Receiving Antenna• 915 MHz center frequency• Directional Pattern(122° horizontal, 68° vertical)•Gain = 6.1 dBi2”www.powercastco.com©2010 Powercast Co

PIC24F16KA 16-bit XLP MCU• Fast Wake-up– Internal Oscillator on in 2-3 µs• 90% Single-Cycle Instructions for Efficient Execution– Fast execution of co

MRF24J40 Transceiver• 2.4 GHz IEEE 802.15.4 compliant• Supports MiWi™, MiWi P2P & ZigBee®• 4-wire SPI interface• In-line/stand-alone encryption• A

MiWi™ P2P•• Protocol…Protocol…–– Variation of IEEE 802.15.4 Variation of IEEE 802.15.4 –– Supports both peerSupports both peer--toto--peer and star to

MiWi™ P2P Protocol• MiWi™ Flexibility– Basic Stack is only 3.3 KB– Segmented features allow for growth & power optimization• Powercast MiWi P2P De

XLP 16-bit Development Board• Access point for network– MRF24J40MA PICtail™ as the receiver–USB connection to PCwww.powercastco.com©2010 Powercast Co

Results for 2010• Shorter transmission time– Due to MiWi™ P2P scalability & PIC24F execution times• Lower power consumption– Due to PIC24F with XL

P2110/PIC®MCU Sensor ModuleAfterBeforewww.powercastco.com©2010 Powercast Corporationwww.microchip.com©2010 Microchip Technology Inc.19

Why RF Power?• Wire-free Operation– Completely portable & untethered– Place anywhere in range of RF power source• Reliable–Power source is control

P2110/PIC®MCU Sensor ModuleAfterwww.powercastco.com©2010 Powercast Corporationwww.microchip.com©2010 Microchip Technology Inc.20

P2110/PIC®MCU Sensor Module (Cont’d)80100120Time between Packets (s)3W EIRP TransmitterRx Antenna G = 4.1Only Only 20 20 secondsseconds between betwee

System PerformanceTransmissions Per Hour Initial Charge Timewww.powercastco.com©2010 Powercast Corporationwww.microchip.com©2010 Microchip Technolog

Future Activity• Implement software changes for– Internal timed operation• Deep Sleep mode– External timed operation•Timing clock broadcast by transmi

Questions/ContactPowercast CorporationHarry OstaffeDirector, Marketing & Business [email protected]+1 412-923-4774www.power

Simplifying RF Design Custom DesignDatawww.powercastco.com©2010 Powercast Corporationwww.microchip.com©2010 Microchip Technology Inc.3Custom DesignD

2009 nPF: “Off-the-Shelf” Demowww.powercastco.com©2010 Powercast Corporationwww.microchip.com©2010 Microchip Technology Inc.4Initial start-up Data

2009 nPF: System Performance100010000Charge Time (sec)Charge Time vs. DistanceMeasured @10ft (152 sec)Measured @ 15 ft (103 sec)Patch Patch AntennaAnt

Changes for 2010• Module– Integrated design on a single PCB– New P2110 Powerharvester®Receiver– Switch to PIC®MCU with eXtreme Low Power (XLP) technol

P2110/PIC® Microcontroller Battery-FreeSensor SystemModule Components & Features• Powercast P2110 Powerharvester®Receiver• MCU: Microchip PIC24F16

Powerharvester®ReceiversP1110 – Battery• Converts RF to DC• Received Signal Strength Indicator (RSSI) output•Data outputP2110 – Battery-Free• Converts

P2110 Powerharvester®Receiver7654321891011121314DOUTVOUTNCGNDVSETNCVCAPNCGNDRFINGNDDSETINTRESETP2110XXXXXXPin Configurationwww.powercastco.com©2010 P