User's Guide

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LM074 SPP with GAP Central Application v1.1

5.3.5

Failure point 5:

i. The message “PTN2”/”PTN3” indicates that the module is writing a

file to partition2/partition3, module is receiving the file and writing

it to the partition.

ii. After the peer device shows that it has successfully sent the file,

LM074 will close the partition.

iii. After the partition is closed, the message “Sign_OK” indicates that

the module has received Signature.

iv. The message “Sink_Closed” indicates that the module has closed

the partition after receiving the random string.

v. After the partition is closed and if the upgrade procedure is

completed successfully, the module shows the message

“V_PASS_2” / “V_PASS_3”.

vi. If module shows the “failed-CRC” message:

a. If CRC of the received image is not matching to the CRC

mentioned in the image, the module shows a “Failed-CRC”

message.

b. This may be because of disturbances/interferences in

wireless transmission. If so the user should repeat the

procedure from beginning.

c. The module restarts itself with a warm reset and starts

executing the existing image.

d. Refer to the image below: