User's Guide

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LM074 SPP with GAP Central Application v1.1

1. “IND*:CONN_FAILURE=00126f357215” message is shown

to indicate the failure in connection with BD address 0012-

6f-357215.

2. “IND*:CONNECTED=00126f357215” message is shown to

indicate the SPP connection is successfully established and

the devices are in connected state.

3. Once the devices are connected, LM951/LM074 is in SPP-

connected-online-data mode. Every string entered by

host on UART is treated as data and is transmitted to

connected device.

4. User can come out of this mode by entering the Escape

sequence.

4.5.6 Escape sequence “+++”

i. Execution only command/sequence.

ii. Supported only in SPP-connected-online-data mode.

iii. User issues this command to enter in SPP-connected-online-

command mode.

iv. If the user issues escape sequence in SPP-connected-online-data

when LED D10 is Blinking, OK response is given by module and

module enters in SPP-connected-online-command mode.

v. Once the module enters in SPP-connected-online-command mode,

any strings entered on UART are considered as AT commands and

are processed by module (still the module is in connected state).

vi. In SPP-connected-online-command mode, users can query/update

module settings and start the disconnection by issuing at*drop

command.

4.5.7 “AT*AUTO”\r\n

i. Execution only command/sequence.

ii. Supported only in SPP-connected-online-command mode.

iii. User issues this command to enter back in SPP-connected-

online-data mode.

iv. After entering in SPP-connected-online-data mode, any data

entered on UART is transmitted to the remote device over

Bluetooth.

4.5.8 “AT*DROP”\r\n

i. Execution only command.

ii. Supported in all SPP roles (dual, master-only or slave-only).

iii. User issues this command in SPP-connected-online-command

mode to terminate the existing SPP connection (applicable for

existing incoming or outgoing SPP connection).