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net: lwm2m: Make Registration Update ahead time configurable

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Allow to configure, how long before registration timeout should the
Registration Update be sent. The fixed 6 seconds used so far, might
not be enough in slower networks (like NB-IoT), resulting in frequent
re-registrations at LWM2M level.

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
This commit is contained in:
Robert Lubos 2020-06-16 15:09:17 +02:00 • committed by Carles Cufí
commit 44c1101e93
2 changed files with 11 additions and 1 deletions
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10
subsys/net/lib/lwm2m/Kconfig
View file

@ -83,6 +83,16 @@ config LWM2M_ENGINE_DEFAULT_LIFETIME
help
Set the default lifetime (in seconds) for the LWM2M library engine
config LWM2M_SECONDS_TO_UPDATE_EARLY
int "LWM2M Registration Update transmission time before timeout"
default 6
range 1 65535
help
Time in seconds before the registration timeout, when the LWM2M
Registration Update is sent by the engine. In networks with large
round trip times (like NB-IoT), it might be needed to set this value
higher, in order to allow the response to arrive before timeout.
config LWM2M_QUEUE_MODE_ENABLED
bool "Enable Queue Mode UDP binding"
help

2
subsys/net/lib/lwm2m/lwm2m_rd_client.c
View file

@ -61,7 +61,7 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME);
#define LWM2M_RD_CLIENT_URI "rd"
#define SECONDS_TO_UPDATE_EARLY 6
#define SECONDS_TO_UPDATE_EARLY CONFIG_LWM2M_SECONDS_TO_UPDATE_EARLY
#define STATE_MACHINE_UPDATE_INTERVAL_MS 500
/* Leave room for 32 hexadeciaml digits (UUID) + NULL */