The choice of technologies for Wi-Sense products is based on the system goals.
Sensors are designed to be wireless in communication, cordless and maintenance free for life.
This necessitates an ultra low power technology for both the sensor reading and the wireless system.
Sensors are digital by concept;
Sensors have have two modes of operation, timed scanning - (1) where the sensor is accessed for brief periods on a regular timed basis and the value recorded, this is used for example in temperature and humidity logging; or (2) where sensors immediately report an event such as in intruder alarms while maintaining a heartbeat with the web transceiver.
The Wi-Sense RF protocol is very important in optimising the accurate reception of messages.
The sensors require long range wireless capability especially where they must be placed inside units such as deep freezers.
Wide band technologies such as Bluetooth and Wi-Fi do not have good long range transmission and are especially poor in buildings and where water and metal objects exist.
These technologies cannot run for more than one or 2 days on a fixed battery.
Wi-Sense uses ultra-narrow band wireless to achieve the optimal very long transmission distance coupled to extremely long battery life.
Wi-Sense network products can cover ranges of kilometers and are extremely effective within buildings.
This network allows a number of channels so networks may be partitioned or pipelined.
The Wi-Sense "dual wireless micro transceiver" is designed for ultimate reliability, so it has no moving parts like disk drives or fans that will compromise the lifespan.
The unit utilises a dual RISC processor embedded architecture that allows self-monitoring and self-correction for ultimate reliability.
The unit independent of any local service such as continuous power supply and so can also operate as a mobile unit.
On the input side the unit uses the Wi-Sense narrow band network to receive data, and it then packages the information for retransmission over the mobile data network (GPRS or UMTS) to the Wi-Sense application server.
This network is the most reliable due to its cellular nature and independence from any local factors- (A)DSL based networks are dependent on local power supply and fail if the local power is failing out- they are also not mobile.
In order to increase the reliability the Wi-Sense core application is running remotely for the greatest reliability.
There is no dependence on a local PC and all the problems this can bring
The Wi-Sense central application server runs the Wi-Sense applications for all attached clients.
This controls that all client systems are operating and reporting on time.
The unit is very secure with multiple processors and data storage mirrors.
By running the processes centrally Wi-Sense ensures that any software updates are only made centrally rather on each local unit - so customers have make updates.