Hi-Link HLK-B40 - AT Command; AT Instruction Format Description

User Manual
HLK-B40
currently dormant or wake-up:
High: wake-up, full-speed operation.
Figure 10 Control and state timing after low power function is turned on
7. AT command
7.1 ATinstruction format description
All at instructions are in ascii string format and end with carriage return.
Power failure will not be lost after setting. All settings will take effect only after restart.
Query class instructions：
Send
Response
AT+<CMD>=?\r\n
Query success
：
AT+<CMD>=<val>\r\n
OK\r\n
Or query failed：
AT+<CMD>=<val>\r\n
ERROR\r\n