User's Guide

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LM074 SPP with GAP Central Application v1.1

SPP Master only

At*role=master

REP*:SPPRole=MASTER

iv. When the module is in Dual mode, it can accept incoming SPP

connection as well as initiate outgoing SPP connection whereas

module cannot accept or initiate new connection when it is already

connected to any remote device. E.g. if module has established

an outgoing connection, then after terminating the outgoing

connection it can accept incoming connection.

v. In slave-only role

1. BOND=Valid-BD-address. (e.g. BOND=0012-6f-

357215)

x Module will accept connection request only from bonded

device. Connection requests from other devices will be

rejected by module.

2. BOND=0000-00-000000.

x Module will accept connection request from ay device.

vi. In master-only role, Refer ACON and BOND command for more

details.

vii. In any role (dual, Slave only or Master only role) module can

support only one connection at an instance.

4.5.3 “AT*ACON”\r\n

i. Query and set command.

ii. This setting is applicable for Master only role.

iii. Auto connect query command: “AT*ACON=?”\r\n

iv. Auto connect query report: “REP*:ACON=OFF”

v. Command to set ACON as ON is “AT*ACON=ON”\r\n

vi. When the module is in Master-only role and ACON setting is ON,

1. BOND=Valid-BD-address. (e.g. BOND=0012-6f-

357215)

x If device has valid address for BOND, it keeps issuing

connection request to that device till the connection is

established.

2. BOND=0000-00-000000.

x If device has BOND address as Zero, it will start

discovery of nearby Bluetooth devices and issues

connection request to first found device.

vii. When module is in Master-only role and ACON setting is OFF,

module will wait for AT command from user to initiate the

connection request (module will not accept any incoming

connection request).