Campbell Scientific CWS220 Wireless Sensor Network (CWB100, CWS220, and CWS900 - Page 24

Wireless Sensor Network

3.1.3

Configuration CD

A Configuration CD ships with each CWB100 Wireless Base Station.

The CD

has software and files needed to configure and use wireless sensors including:

•

Wireless Sensor Planner

•

Device Configuration Utility

•

Device drivers for CWB100 radio

•

Operating Systems for CR800-Series, CR1000, and CR3000

dataloggers

•

CRBasic Help files for CRBasic instruction related to wireless sensors

•

Wireless Sensor Network Manual

The contents of the Configuration CD are also available at

www.campbellsci.com/downloads.

3.1.4

Configuration Software

Wireless Sensor Planner is typically used to configure a wireless sensor

network.

Wireless Sensor Planner is similar to Network Planner, a component

of LoggerNet 4.1 and higher.

Either Wireless Sensor Planner or Network

Planner can be used with wireless sensor networks.

Device Configuration

Utility version 1.17 and higher may also be used to set up the network.

Network Planner and DevConfig are bundled with LoggerNet software.

LoggerNet version 4.1 and higher is required for support of the wireless sensor

devices.

Wireless Sensor Planner and DevConfig are on the Configuration CD

that ships with the CWB100 Wireless Base Station.

DevConfig and Wireless

Sensor Planner are also available as standalone products at


After setting up the network with Wireless Sensor Planner, configuration

settings are written to the components of the network.

3.1.5

Driver Installation

If no CWB100 or A205 have been previously plugged into your computer, it

will be necessary to install device drivers to enable communication with this

device.

The drivers are available on the Configuration CD that ships with the

CWB100.

The drivers can also be downloaded at


3.2

Creating a Model of the WSN

3.2.1

Wireless Sensor Planner and Network Planner

The Wireless Sensor Planner is a graphical application that assists in the design

of wireless sensor networks.

The Wireless Sensor Planner is essentially a

subset of the Network Planner.

It is identical in functionality and use, but

contains only the components for a wireless sensor network.

The CWB100

and wireless sensors are placed on a drawing canvas and communication links

16

Section	Page
Revision and Copyright Information	1
Warranty	3
Assistance	4
Table of Contents	5
Wireless Sensor Network	9
1. Understanding a Wireless Sensor Network	9
1.1 General Description	9
1.2 CWB100 Wireless Base Station	10
1.3 CWS220 Wireless Infrared Radiometer	11
1.4 CWS655 Wireless Water Content Reflectometer	12
1.5 CWS900 Wireless Sensor Interface	13
2. Specifications	16
2.1 Wireless Sensor Network Radio	16
2.1.1 Electrical	16
2.1.2 Typical RF Range	17
2.1.3 RSSI	17
2.1.4 Service Discovery Protocol	17
2.1.5 Antenna Options	18
2.2 CWB100 Specifications	18
2.2.1 CWB100 Physical Specifications	18
2.2.2 CWB100 Electrical Specifications	18
2.2.3 CWB100 Environmental Specifications	19
2.2.4 Datalogger Compatibility	19
2.3 CWS220 Specifications	19
2.3.1 CWS220 Physical Specifications	19
2.3.2 CWS220 Electrical Specifications	20
2.3.3 CWS220 Environmental Specifications	20
2.4 CWS655 Specifications	20
2.4.1 CWS655 Physical Specifications	20
2.4.2 CWS655 Electrical Specifications	20
2.4.3 CWS655 Environmental Specifications	21
2.5 CWS900 Specifications	21
2.5.1 CWS900 Physical Specifications	21
2.5.2 CWS900 Electrical Specifications	21
2.5.3 CWS900 Environmental Specifications	22
3. Getting Started: Creating a Wireless Sensor Network	22
3.1 Hardware and Software Required for a WSN	22
3.1.1 A205 CWS to PC Interface	22
3.1.2 Required Cables	23
3.1.3 Configuration CD	24
3.1.4 Configuration Software	24
3.1.5 Driver Installation	24
3.2 Creating a Model of the WSN	24
3.2.1 Wireless Sensor Planner and Network Planner	24
3.2.2 Installing Wireless Sensor Planner	25
3.2.3 Using Wireless Sensor Planner	25
3.2.3.1 Simple WSN Example	26
Placing Devices on the Drawing Canvas	26
Adding Communication Links to Devices	27
3.3 Configuring the Devices in the WSN	29
3.3.1 Configuring the CWB100	29
3.3.2 Configuring the CWS655	31
3.3.3 Configuring the CWS900	32
3.4 Sending the Sensor Configuration File to the Datalogger	32
3.5 Programming the Datalogger	33
Determining Size of the Array	34
Determining the Scan Rate	34
Inserting the CWB100() Instruction	34
Finishing the Program	35
3.6 Connecting the CWB100 to the Datalogger	35
3.7 Powering CWS Sensors and Initiating Auto-discovery	35
3.8 Verify that Data is being Transmitted	36
3.9 Physical Connections	36
3.9.1 Connecting the Base Station to the Datalogger	36
3.9.2 Connecting Sensors to the CWS900	37
4. Programming the Datalogger	37
4.1 Array Declaration	37
4.2 CWB100() Instruction	38
4.2.1 Configuration String	39
4.2.2 Field Names	40
4.2.3 Status Monitoring	40
4.3 ArrayIndex() Instruction	41
4.4 CWB100RSSI() Instruction	42
4.5 CWB100Routes() Instruction	42
4.6 Program Example	43
5. CWS Button and LED Behavior	45
5.1 Sensor Link to Base Station	45
5.2 Sensor Battery Voltage	45
5.3 CWS Sensor Search for Base Station	45
6. Testing the Network	46
7. Maintenance	48
7.1 Replacing a Sensor in the Network	49
7.2 Stopping or Loading a New Datalogger Program	49
8. Troubleshooting	50
Appendix A. Using DevConfig for CWS Setup	53
Appendix B. Measurement Names and Meanings	57
B.1 CWS220 Default Names	57
B.2 CWS655 Default Names	57
B.3 CWS900 Default Names	58
B.3.1 Wind Vector Calculations	60
Measured raw data:	60
Calculations:	60
Appendix C. Battery Life	65
C.1 Battery Characteristics	65
C.2 Effect of Polling Interval and Repeaters on Battery Life	65
C.3 RF Connection Type Setting	66
C.4 Repair of a Lost Connection	67

Campbell Scientific CWS220 Wireless Sensor Network (CWB100, CWS220, and CWS900 - Page 24

Creating a Model of the WSN

Page 24 highlights