Specifications

HM-BT4502 V1.0
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"TTM: ERP\r\n\0" through the serial port.
9.17 AT Instruction List
AT Instruction
Format
Power
down
save
Parameter Description
Possible Response
Meaning
TTM:CIT-Xms(valid
only after
successful
connection)
No
X="20"，"30"，"50"，"100"，
"200"，"300"，"400"，"500"，
"1000"，"1500"，"2000". Set
the corresponding BLE
connection interval in ms.
TTM:TIMEOUT\r\n\0
TTM:OK\r\n\0
TTM:ERP\r\n\0
Setting is timeout
Setting is OK.
Setting is Error.
TTM: NAM-?
Yes
Get the module name
TTM:
NAM-xxxxxxxxxxxx,
"xxxxxxxxxxxx" is
the module name.
Return the
module name
TTM:REN-+ Name
Yes
Name means a new module
name, any string within 15
bytes in length.
TTM:OK\r\n\0
TTM:ERP\r\n\0
Setting is OK.
Setting is Error.
TTM: BPS-?
－
Get the baud rate.
TTM:BPS-X，"X" is
the baud rate.
Return the baud
rate.
TTM:BPS-X
Yes
X="4800"，"9600"，"19200"，
TTM:BPS SET
If the setting is