Product Specs

Page 5 of 18

1. Introduction

The Bluetooth Low Energy Wireless E-RL 2 lock can be controlled directly through

standard Bluetooth LE communication without the need for a proprietary

communication stack. Bluetooth Low Energy sometimes referred to as Bluetooth LE

or Bluetooth 5 is a new technology completely different and not compatible with

Classic Bluetooth that has been around since 2001. Classic Bluetooth is well known

for its use in hands free car kits and wireless earphones remote controls for GSM and

smart phones.

The Bluetooth Low Energy (BLE) based E-RL 2 takes all complicated lock handling,

timing and key management out of the hands of the application (app) builder and offers

a simple straightforward standard KeySafe cloud API interface to control and monitor

the E-RL 2. The E-RL 2 employs an extreme smart low power saving mode

minimizing current consumption to maximize battery life while offering selective

response to control commands. All this is done with only one sole purpose and that is

to maximize battery life while minimizing the negative effects for the user.

1.1 Quick Overview of Bluetooth LE

Bluetooth Low Energy (BLE) is a Bluetooth technology which was released into the

main Bluetooth standard in 2010 along with the Bluetooth Core Specification Version

4.0. Classic Bluetooth devices had suffered from being extremely energy greedy, and

the need for a better energy management was necessary. BLE solved this problem and

has since been used on most modern devices (all Apple iPhone since the 4S, Samsung

phones since the Galaxy SIII, and many more), it’s now part of every smartphone in

the market. BLE allows us to use the bluetooth communication for small data

exchanges and hence to avoid consuming as much energy. The latest Bluetooth

standard has been released in June 2016 and since than being implemended in

smartphones, the new standard is marketed as Bluetooh 5. The biggest improvements

of the new standard are the extended frame length, extended range if implemented and

the increased communication speed. The extended range and increased communication

speed are mutually exclusive, meaning that you can’t have both at the same time.

1.1.1 Application Perspective

Before we get into the description of how the E-RL 2 works in detail, let’s simply

review a couple characteristics of Bluetooth LE devices and how the E-RL 2 fits in

these:

 Servers vs. Clients: these definitions are fairly classic. The Client emits

requests and receives responses while the Server listens for requests and sends

responses.