Bluetooth Low Energy (Ble) Feature - Elatec TWN4 USB Front Reader Technical Handbook

Hide thumbs Also See for TWN4 USB Front Reader:

Table of Contents

3 Bluetooth Low Energy (BLE) Feature

The traditional Bluetooth standard is convenient for constant-ﬂow media transfer applications such as video

streaming. The Bluetooth Low Energy standard was introduced for applications requiring a lower power

consumption proﬁle. Data is sent in bursts, followed by periods of electrical idle.

The TWN4 MultiTech 3 BLE uses the BGM121 module from Silicon Labs. The chip implements the

Physical, Link and L2CAP Layers of the BLE Protocol. The API is implemented within the ﬁrmware of

the main TWN4 microcontroller. The two chips interact via the COM2 port and GPIO7 (connected to Reset

of BGM121) of the TWN4 microcontroller, thereby making COM2 and GPIO7 unavailable for custom user

functions.

For more information about the BLE implementation see document TWN4 BLE Protocol Speciﬁcation.

For more information regarding the Bluetooth Low Energy Standard please see document "Designing for

Bluetooth Low Energy" from Silicon Labs.

For the description of all the BLE-related commands available, please see the TWN4 API document.

Page 6 of 8

Table of Contents

Do you have a question about the TWN4 USB Front Reader and is the answer not in the manual?