User's Guide

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LM074 SPP with GAP Central Application v1.1

e. If the module replies as “ERR”, the user should try entering

the correct password and try to get the message “Ready to

receive OTA file”.

f. The module can process successfully even though it already

had more than one failure attempt while getting “Ready to

receive OTA file” message.

5.3.3 Failure point 3:

i. Once the module enters in Online-connected-command-mode, the

user should provide the firmware upgrade password through AT

command.

ii. If the user provides the correct firmware upgrade password, the

module responds to the command with “OK”.

iii. After displaying the OK response, the module displays the

message “Ready to receive OTA file” if it is in the state to receive

the upgrade image.

iv. Module replies as “State Err”

a. If the firmware upgrade password is correct but module is

not in state to perform the upgrade procedure, the module

will respond as “State err” to the “AT*upgrade” command.

b. The module will display “State err” message if it is not

connected to a remote device or it has lost the current

connection.

c. If module replies as “State err”, the user cannot proceed to

the firmware upgrade procedure and should check for the BT

connection of LM074 with peer device.

d. In this case, the user shall start the upgrade procedure from

the beginning.

e. Refer to the image below: