User Guide to PL131
Document Number 1155-4713 Rev E
Page 15
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Locator wakes up
Get:
location fix from GPS
temperature reading
battery voltage
signal strength
wake-up event type
Is network
available?
Queue message
Attempt connection
to server
Did Locator
connect to
server?
No
Yes
Send
message
to server
Did
Locator receive a
message back from
server?
Did server
send new
configuration?
Did server send
factory reset?
Save
configuration
Queue ACK
Yes
No
Yes
Set Locator to
factory defaults
Did server send
NAK or ACK?
Remove msg
from queue
End Process
No
Queue NACK
No
No
Remove msg
from queue
Is
configuration
valid?
Yes
Queue NACK
No
Yes
Yes
Remove msg
from queue
Did server send
FOTA header?
No
Did server send
FOTA data pkt?
Enough space in
file system?
Yes
Change retries to
20 for Sat
Queue ACK
BEGIN
FOTA
No
Yes
Is a FOTA in
progress?
Yes
Change retries to
20 for Sat
CONTINUE
FOTA
Yes
Queue message
Yes
No
End FOTA
No
No
