The node is a key component for the Wireless Sensor Netowrk (WSN). The node is responsible for reading sensor data and controlling irrigation.
Decagon Data Logger (i.e. Node)
The Sensorweb system supports different node types that can be selected based on the application:
- Decagon Em50R - Reliable node capable of reading data from up to 5 sensors. Onboard radio sends data to the base station.
- Decagon Em50G - Similiar to the Em50r but uses a 3G cellular modem to report data to a central base station.
- Decagon nR5 - Similiar to the Em50r but can control 24VAC solenoids and can be configured wirelessly.
- Decagon nR5-DC - Similiar to the nR5 but can control DC latching solenoids.
- CMU - The CMU node is an easy to customize platform that is used for development and testing new features.
The Decagon nodes are reliable and designed for ease-of-use. Typical battery life is almost a full year using 5 AA batteries. The nR5-DC node self powers DC latching solenoids so that growers do not need to run any electrical lines for the solenoids and irrigation control (cost and time savings!).
The CMU nodes are a research platform that is not as reliable, but allows for testing new features and algorithms. Typical battery life is 4 months with 2 D batteries.