Abeeway Micro Tracker - BLE (Bluetooth Low Energy) Capabilities

Micro Tracker Reference Guide FW 1.7 V1.1
Page 8 of 39
11th october 2018
Restricted distribution
4.3 BLE (Bluetooth Low Energy) capabilities
The firmware version 1.7 uses the Bluetooth Low Energy (BLE) capabilities of the micro trackers. Devices,
such as Smart-phones, graphical tablets and so on can communicate with the tracker via this interface.
This connectivity can be enabled or disabled via the bit 5 of the config_flags parameter.
Smartphones or graphical tablets run the Client application and are called Central device in this section.
Unless otherwise specified:
➢ all numerical values transmitted through BLE interface shall be in big endian.
➢ all string values transmitted through BLE interface shall be composed of unicode characters encoded
with UTF-8.
Note:
1- Wifi scans can’t be performed while it’s advertising and not bonded, to not disturb bonding process.
Terminology used:
➢ WRITE_CMD: ATT write command. No answer expected.
➢ WRITE_REQ: ATT request command. An answer is expected.
➢ WRITE_RESP: ATT response command.
➢ NOTIFICATION: ATT notification.
➢ SCAN_REQ: ATT scan request.
➢ SCAN_RESP: ATT scan response.
➢ ERROR_RSP: ATT error response
➢ READ_REQ: ATT read request command. An answer is expected.
➢ READ_RESP: ATT read response.
4.3.1 Advertisement and connection
When the tracker is powered on, it tries to establish a connection with a central device. The configured
connection interval depends on its bonding state:
➢ In absence of bond:
✓ tracker sends advertisements each 500ms for 1 minute.
(1)
✓ the buzzer beeps periodically
➢ If the device is bonded but not connected, it sends advertisements each 2 seconds without any
timeout. This lets the client to use the auto-reconnection capability.
Advertisement packets are sent on each of the 3 advertising channels.
Note:
(1) If the device is not connected within 1-minute delay the BLE module is switch off