8911 datasheet(8/11 Pages) TEC

8 / 11 page

8911 WIRELESS ACCELEROMETER

LoRaWAN™ 868/915MHz

TE CONNECTIVITY SENSORS /// MODEL 8911

02/2020

Page 8

WORKFLOW

When the sensor powers up it performs a self-diagnostic then tries to join the LoRaWAN™ network using OTAA.

The sensor tries to join the network every 10 second and increases the join timer at every failed attempt by 20%,

up to 1 hour maximum. After a successful join the sensor enters sampling mode.

Once a LoRaWAN™ network has been joined, the sensor will loop through this workflow with a user defined period.

If the LoRaWAN™ transmission fails too many times the sensor will consider it has left the LoRaWAN™ network

and will go back to joining a network.

Pressing the push button on the sensor at any point during the sensor’s life cycle will automatically trigger a new capture and data analysis.

BATTERY LIFE

The Sensor battery life will greatly depend on LoRa® spread factor (SF), therefore on sensor proximity from a

gateway and network quality.

Transmission period (hours)

Theorical lifetime

SF11

SF9

SF7

8911 Datasheet(PDF) 8 Page - TE Connectivity Ltd