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Onsite Weather Logger/Propeller
(OWL3pro)
Overview
Specifications
Documentation
Prices and Ordering
Parallax "Propeller" microcontroller
32 bit, 8 core
capable of mulitple simultaneous threads for sensor and communications interface and data processing
multiple clock speeds, 80Mhz for high speed down to 20kHz
20µA for long battery life
64kbyte eeprom program and data memory.
serial programming and debugging
library programming objects, see obex.parallax.com
8 channel, 16 bit analog to digital converters
suitable for thermocouples or other low level measurements.
single ended or differential down to 0.256V up to 3.3V full scale.
on-board reference temperature sensor.
8 channels single ended, 4 differential, or combination of the two.
5ppm temperature compensated real time clock
battery backed scratchpad for memory and alarms
3.3V power
also switched power for external sensors and SD card
1st level I/0 protection
General purpose input/output interface from microcontroller
I/O protected by 220 ohm resistors from miswiring and short circuit.
2RS232 system interface
just like a standard Propellor, addressed as P30 and P31
also used as programming port, just like any other Propellor.
Built-in attention capacitor.
Real time clock with embedded crystal
ISL12020M keeps accurate time from seconds to years
± 5ppm accuracy
lithium cell backup, included, keeps clock running for 10 years even when the main power is disconnected, automatic power switching.
On board temperature measurement can be used for software error correction.
Main OWL3pro accessories
standard SD card via stacking circuit board.
on board socket for XBee wireless.
breakout terminals and headers.
i2c LCD screen and button module.
enclosure and mouting options.
Li-ion battery and charger
apllication programming
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