Lierda Science and Technology Group LSD4BTS25A User Manual
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Product Name：S25A series BLE module
Document version：Rev03
Lierda Science & Technology Co., LTD
User Guide
Address: West Road, Hangzhou City, No. 1326 Leader Science Park
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Contents
Chapter 1 Feature ......................................................................................................................................... 3
Chapter2 layout and interface ................................................................................................................. 3
Chapter3 module control ............................................................................................................................. 5
3.1 UART communication ....................................................................................................................... 5
3.1.1 UART frame structure ....................................................................................................... 5
3.2 Dual UART coexistence rules ..................................................................................................... 5
3.3 other instructions ....................................................................................................................... 6
Chapter4 Notices ........................................................................................................................................... 6
Chapter5 To user ........................................................................................................................................... 6
Address: West Road, Hangzhou City, No. 1326 Leader Science Park
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Chapter 1 Feature
This module is based on the Bluetooth SIG Bluetooth Low Energy standard designed BLE
transparent module. The module control the BLE slave d evi ce as a m ast e r d evi ce . This product
allows you to quickly develop standard BLE products without the complexity of BLE protocol
research. After the connection is established, bi-directional data transfer between the master
and the slave can be achieved
Chapter2 layout and interface
figure 2-1 module pin dimension
name function remark
VCC Power
GND
DIO_0 UART_RX1 UART 1 receive pin
DIO_1 UART_TX1 UART 1 transmit pin
DIO_2 UART_RX2 UART 2 receive pin
DIO_3 BRE
DIO_4 BTT
DIO_5 UART_TX2 UART 2 transmit pin
DIO_6 BT_CTL
1.8-3.6V，typical is 3.3V
Power Ground
Sleep state indication
0：Active state，module can receive UART data
1：Sleep state，module can’t receive UART data
Data receive indication
0：The data is sent to the MCU soon or now
1：at this time there is no data sent to the MCU
advertise control pin
Low：turn on BLE and be able to be discover
High：Close BLE stop to be discover or disconnected
table 2-1 pin description
Address: West Road, Hangzhou City, No. 1326 Leader Science Park
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