User's Manual
Table Of Contents
- 1.Product Profile
- 2.Functional Description
- 2.1 WiFi Indicator Flashing Description
- 2.2 Wifi Connection Status Indicator Pin
- 2.3 Socket Connection Status Indicator Pin
- 2.4 One-click Distribution Mode
- 2.5 Web Distribution Function
- 2.6 Serial to WIFI STA
- 2.7 Serial to WIFI AP
- 2.8 Serial Port Working State Conversion
- 2.9 Serial Port-network Data Conversion
- 2.10 Application Areas
- 3. AT Instructions
- 3.1 Query Current Module Version: at+ver
- 3.2 Local Port Operation: at+CLport
- 3.3 Set up Serial Port: at+uart
- 3.4 Set up DHCP: at+dhcpc
- 3.5 Set up Wifi Connection Mode: at+netmode
- 3.6 Set up TCP Connection Mode: at+mode
- 3.7 Set up Remote IP When Modules Work as Client
- 3.8 Set up Remote Port When Module Act as Client:
- 3.9 Set Parameter Submission: at+net_commit
- 3.10 System Restart: at+reconn
- 3.11 Set the Module's ssid and Password: at+wifi_
- 3.12 Set up Socket Connection Protocol: at+remote
- 3.13 Set Network Connection Parameters: at+net_ip
- 3.14 Query Network Connection Status in STA Mode:
- 3.15 Query Module MAC Address: at+Get_MAC
- 3.16 Set the Frame Length: at + uartpacklen
- 3.17 Set the Frame Time:at+uartpacktimeout
- 3.18 Set Bluetooth Name: at+ble_name
- 3.19 Configuration Software Description
- 4.Upgrade Introduction
- 8. Appendix A Document Revision
8
2.7 Serial Port Working State Conversion
After the HLK-B32 is powered on, the default mode is transmission mode. By pulling down the
pin ES0 (GPIO0) to enter at instruction mode longer than 50ms, the module will process the
received data as at instructions, send at instructions to let the module into transparent mode, After the
network connection, the data received by the serial port will be transmitted as transparent data.
Figure 6. Serial port mode conversion
2.8 Serial Port-network Data Conversion
2.8.1 Module as TCP Server
Figure 7. TCP Server
In this mode, the module listens to the specified port, waits for TCP Client connection, and after the
connection, all TCP data is directly sent to the serial port end, and the data of the serial port end is sent to all TCP
Client ends. When the module is used as the TCP server, the most supporting two TCP clients are connected to the
TCP server.
AT mode
Power on
Transparent mode
Pull down es0 pin
Send at command
TCP Server
TCP Client
TCP Client
TCP Client