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2.7. Application Area
Smart home
Instruments
Wi-Fi remote monitoring / control
Toy field
Color LED control
Intelligent integrated management of fire protection and security
Smart card terminals, wireless POS machines, hand-held devices, etc.
3. AT instruction instructions
Instruction format: In the AT instruction mode, the system can be configured through the AT
instruction of the serial port.
The instruction format is as follows:
at + [command] = [value], [value], [value] ......
All commands start with "at" and end with "\ r". If the command is not encapsulated in this
format, it will not be processed, and different return values will be returned according to different
command of modules.
Example: "at + ver =?"
The module will return: HLK-B30 (b.1.00.120191206180224)
Query instruction format:
at + [command] =?
3.1. Query the current module version: at + ver
Grammar rules:
Command type
Grammar/ Syntax
Return and description
Executing command
at+ver=?
at+ver=HLK-B30(b.1.00.120191206180224): current version
