User's Guide

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LM074 SPP with GAP Central Application v1.1

3.8.2 “AT*INDESPr\n

i. Execution only command.

ii. This command gives feedback to server/peripheral for notification

indication from server/peripheral.

iii. This command is used to acknowledge the sever that client(BLE-

Central) has received characteristic value Indication, and

server(BLE-Peripheral) may send another indication.

iv. Command format is “at*INDRESP=Conn-ID”.

v. e.g. “AT*INDRESP=1” gives indication response for 1

connected

BLE device for receiving notification indication.

vi. OK/ERR response is given by LM074 after checking the Connection

ID and Connection status.

vii. After OK response is given Response is forwarded to remote

device by BLE-Stack.

viii. No feedback form BLE-Stack is provided to this command.

3.8.3 “AT*WRWORESP”\r\n

i. Execution only command

ii. This command is used to send data to BLE device for the

characteristic which has properties as “Wr_cmd” i.e. 0x04.

iii. Command format is “AT*WRWORESP=conn-ID, char-Handle,

length, actual-bytes ”.

iv. e.g. “at*wrworesp=1,0019,10,12345abcdef!()12” command is

used to send data to 1

connected device, on characteristic 0019.

No of bytes to write are 0x10 i.e. 16 and actual bytes are

1,2,3,4,5,a,b,c,d,e,f,!,(,),1,2.

v. As shown in the example command number of bytes to transmit is

hex value.

vi. As shown in the example command, actual data bytes are not

separated by a comma. When the value 0x31 is sent i.e. ASCII 1

is sent, the data buffer is copied and sent to remote device

transparently.

vii. Note : The actual data bytes to be sent shall not have “\r\n” as

the data itself because it is the terminating string for AT command

parser.

viii. For command “AT*WRWORESP=conn-ID, char-Handle, length,

actual-bytes” module gives OK response if all the following

conditions are true:

a. connection ID is correct (if module is connected to 3 devices

and CID mentions 4, then it is invalid)

b. Characteristic handle has WR_cmd properties

c. Value of “length” field is less than 21 i.e. (0x15).

d. Actual data bytes are same as value of “length” field.