Add a callback to notify applications when the datarate has changed.
This allows applications to know when payload sizes have changed without
needing to call `lorawan_get_payload_sizes` before each transmission.
This also enables:
* Monitoring of network conditions on the device
* Determining if a network connection has been lost
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Keep track of the current network datarate when ADR is enabled.
The datarate can change in two circumstances. Firstly, the datarate may
change as a result of a command from the LoRaWAN server as the link
budget varies. Secondly, the datarate may be changed due to not
receiving an expected ADRACKReq response. This necessitates querying the
datarate on both packet reception and transmission to provide timely
notifications to the application.
Due to querying the default region datarate at startup and validating
manual datarate parameters, when ADR is not enabled the datarate will
never be different from the value provided to `lorawan_set_datarate`.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Add a function to query the minimum possible datarate on the network.
This value may change over the lifetime of the connection as a result
of commands from the network server.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Add the ability for applications to query the maximum size of packets
that can be sent. This must be dynamically queried as the sizes change
with datarate, region, and as MAC commands are added by the stack.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Provide the LoRaWAN stack with an optional callback to be
called whenever the battery level needs to be read.
In the case of callback not being provided, the LoRaWAN
stack will report 255 (battery level unavailable) as per
the LoRaWAN spec.
Signed-off-by: Kuba Sanak <contact@kuba.fyi>
Move the public network request command from the end of `lorawan_start`
to the start of `lorawan_join`. This MAC command interacts with the
radio driver, bringing it out of sleep mode, and doesn't put it back.
The public network setting is only needed when joining a network, and
`lorawan_start` can be called well before `lorawan_join`. By moving the
command we save ~600uA before joining (for sx1262).
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Restore the user requested datarate upon a successful join. Several
regions overwrite the configured datarate through `RegionAlternateDr`,
which means that for these regions, `LoRaMacQueryTxPossible` will not
be evaluating the requested datarate for the first transmission after
joining.
Fixes#31551.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Validate datarates requested by users. As a side effect of this change
the MAC layer is immediately aware of updated datarates. Therefore
`LoRaMacQueryTxPossible` in `lorawan_send` will be using the same
datarate to evaluate the payload length as `LoRaMacMcpsRequest` is
requesting.
Fixes#31551.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Query the default datarate for the configured region, instead of
assuming that the default is DR_0.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Fixes an issue where `lorawan_send` would return prematurely when
`LORAWAN_MSG_CONFIRMED` is mixed with unconfirmed messages.
All calls to `LoRaMacMcpsRequest` result in `McpsConfirm` being run,
where the semaphore `mcps_confirm_sem` is given. However this semaphore
is only taken when `LORAWAN_MSG_CONFIRMED` is set.
Therefore if an unconfirmed message is sent, any following confirmed
messages will return from `lorawan_send` immediately as the semaphore
will be available from the previous send. The return value would also
be wrong for the same reasons.
Fixed by only giving the semaphore in situations when it is being
blocked on.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
The error handling code currently has a couple of issues:
* It relies on ordered lists and upstream not changing any constants.
* Converted messages are not stored in constant memory which means
that log_strdup is needed whenever they are printed.
This change also factors out error handling to a separate file,
lw_priv.{c,h}, to facilitate reuse in a future secure element and
state storage implementation.
Signed-off-by: Andreas Sandberg <andreas@sandberg.pp.se>
For consistency with other parts of Zephyr, the public APIs available
in lorawan subsystem now returns error codes from the set defined in
errno.h.
Signed-off-by: Kuba Sanak <contact@kuba.fyi>
[mani: reworked the code and commit a bit for upstream]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
SystemMaxRxError is used to negotiate overall timing error for Rx
in the loramac-node library. Hence, add support for configuring this
parameter from Kconfig.
Signed-off-by: Kuba Sanak <contact@kuba.fyi>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Add initial support for LoRaWAN based on Semtech's loramac-node
library. Current implementation only supports OTAA config and
sending data to LoRaWAN server like ThingsNetwork.
While at it, this commit also moves the "loramac-node" library
definition from drivers/lora to subsys/lorawan. This is required
because, subsys/lorawan gets processed before drivers/lora and
that creates issue while building.
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
