IDLE

INIT

LwM2M engine state machine

DO
REGISTRATION

if bootstrap needed

Send bootstrap registration message

DO
BOOTSTRAP REG

Send registration message

REGISTRATION
SENT

Successful registration response
Emit event 5

REGISTRATION
DONE

Only in queue mode
after idle period.
Emit event 10

RX OFF
IDLE

UPDATE SENT

Update

Update

Successful update
Emit event 7

Send deregistration message

DEREGISTER

acknowledged

DEREGISTRATION
SENT

stop requested
Emit event 9

Server
is disabled

DEREGISTERED

NETWORK
ERROR

Successful bootstrap registration response
Emit event 2

BOOTSTRAP REQ SENT

Bootstrap finish from server

BOOTSTRAP REQ DONE

BOOTSTRAP TRANS DONE

Emit event 3

Emit event ¹¹

Message transmission failed
If not bootstrap, emit event 6

Failure code in response
or timeout
Emit event 6

Registration failed,
emit event 4

Failure
Event 8

UPDATE REGISTRATION

Send update registration
message 

Registration lifetime
is not yet expired

fallback

Suspending

ANY
STATE

SUSPENDED

DO
REGISTRATION

REGISTRATION
DONE

Bootstrap failed,
emit event 1

SERVER
DISABLED

Server disabled,
emit event 12

Cannot recover,
emit event 13

Disable timer
expired

connecting

connected

stopped

Disconnected
for a perdiod

Disconnecting
or stopping

Color coding

recovering