WCH BLE2U, Руководство пользователя

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BLE2U 7 http://wch.cn
recommended to use CTS/RTS flow control to prevent buffer overflow when the baud rate exceeds 9600bit/s
and the BLE average RSSI is less than -70dBm. The USB interface is a USB2.0 full-speed device, which
communicates with PC through analog serial port device, and is compatible with common serial software.
8.3 LED function
List of LED status description
No. Status Description
1 once quickly flashes 3 times after powered on currently in slave mode
2 twice quickly flashes 3 times after powered on currently in master-slave mode
3 slowly flashes at 500ms intervals currently in broadcast status
4 keeps on currently in connection status
5 quickly flashes in connection status currently performing data transmission
6
quickly flashes in pairing process
has been paired with other devices, need
power-up again to complete pairing
For details, please refer to CH9143 datasheet.
9. Schematic diagram for reference
3V3
GND
1K
R2
D1
LED0
3V3
RXD_CONNECT_MCU_TXD
TXD_CONNECT_MCU_RXD
GND
2
3
1 S1
Select 1 for master-slave mode
Select 3 for slave mode
GND
1
PANT
2
SWREG_EN
3
BLE_MODE
4
RTS#
5
DCD#
6
RI#
7
CTS#
8
N
C
9
N
C
10
G
N
D
11
V
C
C
12
L
E
D
13
D
S
R
#
14
A
T
15
R
L
/B
S
TA
16
FCE
17
DTR#
18
UD+
19
UD-
20
TXD
21
RXD
22
RST#
23
TNOW
24
U1
BLE2U-C
GND
CONNECT_MCU_UD-
CONNECT