lierda LSD4BTB-PBC1000001 Locator Beacon User Manual

lierda LSD4BTB-PBC1000001 Locator Beacon

Features

An ultra-low-power beacon device that supports iBeacon and Eddystone UID & URL.

APP communication protocol

APP sends instructions to the Beacon module through the FE61 channel. After receiving the instructions, the module parses and executes the instructions, and returns the result of the instruction execution to the APP through the FE62 channel. The whole process is shown in the following figure.

Airbag structure

APP sends instructions to the Beacon module through Bluetooth. In order to facilitate module recognition, the instructions must conform to a certain format; at the same time, the Bluetooth module will return data to the APP in the agreed format after executing the instructions. The input frame command format is as follows As shown in the table, the response frame command format is shown in the following table.

Table 2 1 Input frame command format (hex)

Start

character

| Command

ID

| Command

length

| Command

parameter

---|---|---|---
01 FC| xx| xx| xx……xx

Table 2 2 Response frame command format (hex)

Start

character

| Command

ID

| Command

length

| ****

Execution status

| ****

Response data

---|---|---|---|---
04 FC| xx| xx| xx| xx……xx
---|---|---|---|---

• Start character: all command frames must start with “01 FC”, and all response frames start with “04 FC”.
• Command ID: The IDs of commands with different functions are unique. The following is an enumeration and detailed explanation of all commands.
• Command length: The input frame length is the number of bytes of the input frame command parameters, and the response frame length is the sum of the execution status and the length of the response data.
• Command parameter: The command parameter of the command frame is the parameter of the command execution.
• Execution status: The execution status is the content contained in the response frame, 1 byte, immediately after the length of the response frame, 00 means the command was successfully received, and other non-zero means the reception/processing failed.
• Response data: The response data is the data carried in the response frame. For details, see the detailed explanation of the serial port command frame below.
• Data unit: Each independent data unit with no less than 2 bytes in the instruction should be transmitted in low-endian order, for example: The transmission order of 1000 (0x03E8) is E8 03.

Detailed instructions

ID

| ****

Command function

| ****

Description

| Drop Electricity Protect

Save

---|---|---|---
01| Set Bluetooth MAC

address

| Format: 01 FC 01 06 MAC

MAC: 6-byte unsigned integer, MAC address.

Note: You need to restart the device to take effect. Return: 04 FC 01 01 status

| YES
02| Query Bluetooth MAC

address

| Format: 01 FC 02 00

Returns: 04 FC 02 len status [MAC] MAC: The mac address of the device.

| /
03| Set device

name

| Format: 01 FC 03 len Name

len: 1-byte unsigned integer, the number of bytes in the device name, range [1-20];

| YES
| | Name: The name of the device, usually a visible string.

Return: 04 FC 03 01 status

|
---|---|---|---
04| Query device

name

| Format: 01 FC 04 00

Returns: 04 FC 04 len status [Name]

|
05| Set the uuid broadcast

by beacon

| Format: 01 FC 05 len uuid

len: 1-byte unsigned integer, the length of uuid, fixed at 0x10. Big endian. uuid: 16-byte unsigned integer, beacon specific uuid.

Return: 04 FC 05 01 status

| YES
06| Query beacon broadcast

uuid

| Format: 01 FC 06 00

Returns: 04 FC 06 len status [uuid]

|
07| Set the major of beacon

broadcast

| Format: 01 FC 07 02 major

major: 2-byte unsigned integer, major beacon number, little-endian byte order. Returns: 04 FC 07 01 state

|
08| Query the major of beacon

broadcast

| Format: 01 FC 08 00

Returns: 04 FC 08 03 state[major]

|
09| Set the minor of beaco

broadcast

| Format: 01 FC 09 02 minor

minor: 2-byte unsigned integer, the unique label under the major beacon number, in little-endian byte order.

Returns: 04 FC 09 01 state

|
0A| Query the minor of beacon

broadcast

| Format: 01 FC 0A 00

Returns: 04 FC 0A 03 state[minor]

|

Default parameters

Table 4 1 Module default parameter list

Production        test serial   port     baud

rate

| 115200bps
Broadcast parameters| Broadcast interval: 100ms

Broadcast data: single ibeacon broadcast, if two kinds of broadcast carousels, the switching frequency is 1s.

Broadcast channel: 37, 38, 39

Scan response: switch between scan response format 1 and scan response format 2, see 5.3 for details. The switching frequency is 1s.

Connection| Minimum connection interval -8ms
parameters| Maximum connection interval -100ms
| Slave lurking-0
| Connection loss monitoring timeout time 3 seconds
Transmit power| 0dBm
Receive buffer| 1 KB
mode| Factory mode
Battery             level detection

frequency

| 1 day/time
Temperature detection

frequency

| 4 hour/time
Authentication| close

Main technical content

Introduction to Bluetooth Services and Features

service| /             0xFE60| /              Lierda Bluetooth Low Energy Data Transmission Service
---|---|---
Eigenval

ues

| Data M-S| 0xFE61| WN/W| Command setting channel
Eigenval

ues

| Data S-M| 0xFE62| N| Command setting status return channel

Broadcast settings

Beacon broadcast includes three types: standard ibeacon broadcast, Eddystone UID broadcast and Eddystone URL broadcast.

4.2.1Ibeacon Broadcast format

4.2.2Eddystone Broadcast format

4.2.3Standard broadcast format Type is a value with a common standard. You can check the meaning of the specific number on the official website of the Bluetooth Alliance. The commonly used ones are as follows: Incomplete 16Bit service UUID (0x02), incomplete 128Bit service UUID (0x06), device full name (0x08), device abbreviation (0x09), vendor-defined data (0xFF),
When setting a custom broadcast, the broadcast data must conform to the format of the user data unit shown in the figure above, otherwise the setting cannot be successful

Application layer authentication processing flow

The application layer authentication mechanism is used to implement user access permission restrictions at the application layer. This mechanism can be enabled when the standard Bluetooth pairing encryption mechanism cannot meet the requirements. After setting to enable application-layer authentication in the encryption option (the authentication control bit in the encryption option is set to 1), the module forces the access user to pass the authentication mechanism to communicate normally. At the same time, the encryption option, decryption option, and the use of random key encryption option should be enabled to ensure the communication data.

All are transmitted in cipher text. Figure 5 shows the authentication process after opening. The host requests a random key, refer to the random key generation instruction (ID=0xA0); The host receives the random key generated by the slave and encrypted (using the private key to encrypt the random key AES128-ECB);
After the host encrypts the received random key (using the private key for AES128-ECB encryption), it sends it back to the module through the command (ID=0xA0);
The module side verifies the random key and sends the verification result back to the host side; The host can send verification multiple times. After the verification is passed, the host has the permission to access the slave. If the verification fails within 30 seconds, the module will actively disconnect; After the verification is passed, the module will encrypt the sent data with a random key, and decrypt the received data with a random key.

Mode setting

Beacon has two modes: deployment mode and factory mode Factory mode: In this mode, the device connection does not require an authentication process. Deployment mode: After switching to this mode, the device needs to complete authentication within 10 seconds after being connected. The authentication method is to write the same configuration key as set in the authentication channel to complete the authentication. If the authentication fails Pass to disconnect.

Temperature Sensor

The temperature sensor measures the mold temperature within the temperature range of the device. If the application requires it, linear compensation can be implemented. The main functions of TEMP are listed here:

• The temperature range is greater than or equal to the working temperature of the equipment
• The resolution is 0.25 degrees

Temperature detection is started by triggering the start task. When the temperature measurement is completed, a DATARDY event will be generated, and the measurement result can be read from the temperature register. In order to achieve the measurement accuracy specified in the electrical specifications, a crystal oscillator must be selected as the HFCLK source, When the temperature measurement is completed, the temperature analog electronic power supply drops to save power consumption. TEMP only supports one operation, which means that every TEMP measurement must be done explicitly Use start task to start.

Functional pins

Serial

number

| ****

Pin

| ****

Features

| ****

direction    instruction manual

---|---|---|---
1| P0.18| TX| output      Serial| data| output pin
2| P0.20| RX| Input       Serial| data| input| pin
3| VCC| VCC| /          3.3V
4| GND| GND| /         Ground
---|---|---|---

5

| ****

RESET

| ****

RESET

| Reset pin

input       High level: normal operation of the module Low level: the module keeps reset

6| SWCLK| SWCLK| /          /
7| SWD| SWD| /          /

8

| ****

P0.16

| ****

INT

| The key pin is detected as low level at startup and enters the test

Input

mode.

9

| ****

P0.00

| ****

LED2

| Used to display the connection status, flashes at a frequency of

output

500ms after connection, and the disconnection light is off.

Warning to users

You are welcome to use the products of Lierda Technology Co., Ltd. Before using our products, please read this warning; if you have started to use the instructions, you have read and accepted this warning. Lierda Technology Co., Ltd. reserves the right of final interpretation and modification of all materials provided, and subject to change without notice. Prepared by: Lierda Technology Group Co., Ltd. Wireless Sensor Network December 2020

FCC regulatory conformance

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference.
2.  This device must accept any interference received, including interference that may cause undesired operation.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help

NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment. Such modifications could void the user’s authority to operate the equipment.

RF Exposure This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance of 20 cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

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