Specifications

HM-BT4502 V1.0
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consumption caused by too long advertisement, the custom advertisement is
also possible to set any value of 1 byte.
9.19 System Reset and Recovery
There are three ways to reset the module. The third way can restore the
system parameters.
1. Use the AT instruction to reset the module (see the Chapter of
Serial AT
Instructions
for details);
2. Use APP to remote reset the module through the service channel interface.
(See the chapter of BLE Protocol Description (APP Interface) - Module
Parameter Settings
for details).
3. Use the hardware PDN pin to reset.
After resetting by the above three methods, the parameters marked as not
saved on power failure will be reset to the default values in the AT instruction
list. In addition, in order to prevent hijacking the password, no password is
used by default after restoring to "000000".
In addition, the factory settings can be restored by APP, and all parameters
can be restored to the factory default settings. They include:
a) Serial Port Baud Rate, it is restored to 115200 bps.
b) Device Name, it is restored to "CMT4501-XXXXXXXX", X is the last four
bytes of MAC.
c) Serial Port Data Delay, it is restored to 0 ( 500us < Delay < 1ms ).