The FLECK family of wireless sensor nodes provide high-levels of integration, performance, and reliability. The flexible integration allows for connection of external analog, digital or RS232 sensors solar cell and/or battery to the baseboard via screw terminals. The radio has a range of 500m outdoors with a 15cm whip antenna.
The Nordic 903 radio chip has a sensitive receiver, high data rate and reliable receive data interrupt. It connects to the Atmel CPU via the serial port, leaving the SPI bus free for sensors. The TinyOS radio stack and Deluge has been ported to the Nordic 903.
The power supply includes a highly efficient DC-DC converter allowing a supply voltage range from 1.3 to 5V. In addition it can charge an external rechargeable battery – for example from a solar cell – with no additional components. |
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The base board provides a temperature and a light sensor as well as screw terminal connections for four digital i/o lines and two analog inputs. This allows a single board solution for many simple applications.
The expansion interface consists of two connectors and optional mounting bolts allowing secure mechanical and electrical connection between the two boards. The mounting holes can also be used to mount the FLECK inside a container. |
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Key features
- High performance radio, 72kbit/s, range up to 500m
- Wide supply voltage: 1.3-5V
- Solar cell battery charger
- Single-board solution for many applications:
- Onboard temperature and light sensor
- Screw terminals for four digital I/O lines and two analog inputs
- 3 LED indicators
- Robust expansion connector
- Fully stackable expansion boards have been developed for:
- Greenhouse environment (PAR, air temperature and humidity), soil (temperature and moisture)
- Surveillance and monitoring, colour digital camera, audio, sound detection and DSP
- Water quality sensor such as pH and conductivity
- Soil moisture, drives a stack of five gypsum block probes
- Inertial sensing, 3-axis accelerometer, magnetometer and gyroscope
- GPS capable of 4Hz differential measurement with NMEA or binary outputs
- MMC flash card interface providing up to 1Gbytes of removable local storage
- Optical communications, replaces radio stack
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Applications
- Data collection
- Environmental monitoring
- Agriculture
- Horticulture and greenhouses
- Waterways and oceans
- Livestock management
- Distributed computing
and/or control
- Structural health monitoring
- Personal health monitoring
Technical features – FLECK 1
| Radio range |
500m |
| RX sensitivity |
-109dbM |
| Supply voltage |
yes |
| Temperature sensor |
yes |
| Light sensor |
yes |
| Screw terminal |
4 x digital i/o
2 x analog |
| Onboard |
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