ITK SAS MAST001 Manuel D’Utilisation
5
Connectivity
Introduction
Figure 1. Connectivity
Principle
The ITK-FlowSensor (flow meter) embeds a wireless technology to send the measured amounts of
water to a dedicated receiver: the ITK-FlowMaster. The ITK-FlowMaster is connected to a gateway
over an UART link using a USB port. It is then up to the gateway to recover the data packets and to
interpret them into an embedded application software. To work properly, the ITK-FlowSensor must
first be paired to a unique ITK-FlowMaster (see section “Features / Easy-install”).
Event-driven communication
The ITK-FlowSensor communication is event-driven. The ITK-FlowSensor communicates data to its
paired ITK-FlowMaster when it has data ready to send (after a delay of some seconds, see below).
Typical duration of a data transmission frame is 3.5 seconds.
Number of ITK-FlowSensor devices per ITK-FlowMaster
An ITK-FlowMaster can manage multiple ITK-FlowMeter devices. In the current version of the
product, in order to avoid any message collision at the ITK-FlowMaster, a different transmission time
slot is dynamically attributed to each unique ITK-FlowSensor. A single ITK-FlowMaster can manage a
maximum of 30 ITK-FlowSensor devices. In the next version of the product, time-slots will be
enhanced and a single ITK-FlowMaster will be able to manage up to 75 ITK-FlowSensor devices.