Data
logger module with
MMC/Secure
Digital (SD) data storage
designed to plug in to Application Specific Interface Modules (ASIM).
Three ASIM modules have been built to interface with the DL4-GP:
DL4-IO1-Met, DL4-IO2-GPS-COMM, and DL4-IO3-GPS-COMM.
The
DL4-IO1-Met (2006) provides an interface to a suite of meteorological
sensors: wind speed and direction, relative humidity,
temperature (3 channels), solar radiation, barometric pressure,
precipitation (2 channels), soil/fuel moisture (4 channels).
The
DL4-IO2-GPS-COMM (2006) adds three asynchronous serial I/O ports to
the
DL4-GP through a multiplexed interface to USART1 on the MSP430
microprocessor. One port is dedicated to a Trimble Lassen IQ
12-channel GPS. The two other ports are set up for RS-232
serial communication (RX, TX, CTS, RTS).
The
DL4-IO3-GPS-COMM (2008) is a follow on to the DL4-IO2. It adds
eight multiplexed asynchronous serial I/O ports to the the
DL4-GP. One port is dedicated to a Trimble Lassen IQ
12-channel GPS, two other ports are set up for RS-232
serial communication (RX, TX, CTS, RTS), and five ports are designed
for 3V CMOS serial communication. This hardware was designed
for a project that needed to interface the logger to a Digi XStream
900 MHz radio modem, Judd Engineering Ultrasonic Depth Sensor,
several Decagon ECH20-TE and 5TE Soil Moisture Sensors, and a
Solinst Levelogger.
A time lapse camera
system has been developed using the DL4. The DL4 was used to
take pictures twice a day with a Nikon D2Hs. It has been
deployed for the winter seasons (five months) of 2006-2007 and
2007-2008 in Yosemite National Park.
