Specifications

HM-BT4502 V1.0
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Note: This connection interval is not saved when power fails, and the change
instructions valid only after the connection is successful.
9.2 Get the Module Name
Input the following string "TTM: NAM-?" to the serial port RX.
It will receive the "TTM: NAM-xxxxxxxxxxxx\r\n\0" from TX. The "xxxxxxxxxxxx
"following the string is the Bluetooth module name.
9.3 Rename the Module
Input the string "TTM: REN- Name " to the serial port RX, where "Name" is the
module name, the length is within 15bytes in ASCII format.
For example, "TTM: REN-ABC123" means renaming the module "ABC123".
If the modification is successful, the confirmation string "TTM: OK\r\n\0" will be
received from TX. If the instruction format is incorrect, the string "TTM:
ERP\r\n\0"will be received. This name can be saved after power-down.
9.4 Get the Baud Rate
Input the string "TTM: BPS-?" to the serial port RX to get the baud rate.
"TTM: BPS-X" will be received from TX, among them, X= "9600", "19200",
"38400", "57600", "115200" (the above data formats are ASCII codes).