User's Manual
Table Of Contents
- 1.Product Introduction
- 2.Function description
- 3. AT command instructions
- 3.1.Basic AT commands
- 3.2.WI-FI related AT commands
- 3.3.TCP/IP Related AT commands
- 3.3.8.Set the framing length of the serial port：at+uartp
- 3.3.9.Set the framing time of the serial port：at+uartpac
- 3.4.BLE related AT commands
- 3.5.Custom message prompt instruction
- Note：This type of command does not have a message
- The maximum length supports 30 bytes. Do not inclu
- 4.AT command control code example
- 5.Bluetooth distribution network and data transparen
- 6.Module power consumption measured data
- 7.Appendix A Document Revision History
User Manual
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HLK-B35
9
GND
P
GND
10
NC
I/O
preserve
11
NC
I/O
preserve
12
IO20
I/O
preserve
13
IO21
I/O
WiFi connection
0: WiFi is not connected
1: WiFi is connected
14
IO22
I/O
TCP connection
0: Not connected to the TCP server
1: Connected to the TCP server
15
GND
P
GND
16
IO0
I/O
Module status indicator
17
IO8
I/O
Indicator light not used
18
IO1
I/O
preserve
19
IO3
I/O
Debug serial port (TX pin)
20
IO4
I/O
Debug serial port (RX pin)
21
RXD
I/O
Main serial port send pin
22
TXD
I/O
Main serial port Receive pin