Wireless sensor network - SoilNet

Wireless sensor network

Method:

Radio frequency used:

2.4 GHz

Radio protocol used:

Jenie from Jennic

Range/Power (line of sight/dBm):

Free sight range: 4km

Router to Router in Field in operation: 600 m

Belowground End device to Router in operation: up to 80 m

Transmission power 19 dBm

Hop modes:

multi-hop, tree-network

GPRS:

yes

Mesh limitations:

number of sensors:300

number of nodes per router:10

Additional information:

Sensor compatibility:

Echo EC-5

Echo 5TE

Temperature

4 digital/ 4 analogue

Data reading frequency:

> 1 sec

Storage of data/backup:

400 measurements

Power consumption:

sleep modus: 5 µA

during sending: 125 mA

mW/packets ?

Reliability:

Years in service: 1.5 years Failure rate instrument (years):

Packet failure (%):

Installation procedure:

Separate power meter, Laptop with GPRS, Display showing sensor measurements

Installation underground possible:

yes

Battery life:

End device calculated: 3 years

Router without solar panel: 3 months

Maintenance required /Ease of maintenance:

battery change each 3 month for the router

Software:

Web friendly interface: yes

Data base:yes

Scripting language:Postgrsql, Macrolanguage, C-Programming,

Ease of update:

Open source: yes, also free of cost

Cost:

End device: ~150€

Links

Projects that used the above equipment:

Other related web sites:

Technical information

Distributors