Specifications

HM-BT4502 V1.0
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(PWD_ UPDATED_EVENT)” in the FFC2 channel to indicate that the
password has been successfully updated.
7. When APP submits the password "888888000000" and the new password
is updated to all 0, it means that the password is cancelled. APP will get
the “notify: 3 (PWD_ CANCEL_EVENT)” in the FFC2 channel.
10.3 Module Parameter Setting【Service UUID：0xFF90】
Eigenvalue
UUID
Executable
Operation
Saved
on power
failure
Bytes
Default
Remark
FF91 (handle:
0x0062)
Read/write
Yes
16
Tv232u-xxxxxxxx
（ ASCII String with
Ending Character）
Device name, xxxxxxxx is the
last four bytes of the physical
address
FF92 (handle:
0x0065)
Read/write
No
1
1
Bluetooth Communication
Connection Interval：
0：20ms
1：30ms
2：50ms
3：100ms
4：200ms
5：300ms