nRF Cloud

The nRF Cloud library enables applications to connect to Nordic Semiconductor’s nRF Cloud. It abstracts and hides the details of the transport and the encoding scheme that is used for the payload and provides a simplified API interface for sending data from supported sensor types to the cloud. The current implementation supports the following technologies:

• GNSS and FLIP sensor data

• TLS secured MQTT as the communication protocol

• JSON as the data format

Initializing

Before using any other APIs of the module, the application must call nrf_cloud_init(). If this API fails, the application must not use any APIs of the module.

Note

Initialize the module before starting any timers, sensor drivers, or communication on the link.

Connecting

The application can use nrf_cloud_connect() to connect to the cloud. This API triggers a series of events and actions in the system. If the API fails, the application must retry to connect. If the CONFIG_NRF_CLOUD_CONNECTION_POLL_THREAD Kconfig option is enabled, an nRF Cloud library thread monitors the connection socket. When CONFIG_NRF_CLOUD_CONNECTION_POLL_THREAD is enabled, an additional event, NRF_CLOUD_EVT_TRANSPORT_CONNECTING, is sent to the application. The status field of nrf_cloud_evt contains the connection status that is defined by nrf_cloud_connect_result. The event NRF_CLOUD_EVT_TRANSPORT_DISCONNECTED also contains additional information in the status field that is defined by nrf_cloud_disconnect_status. See Connecting to the Cloud for additional information on CONFIG_NRF_CLOUD_CONNECTION_POLL_THREAD. When the poll thread option is used directly with the nRF Cloud library, the enumeration values are prefixed with NRF.

First, the library tries to establish the transport for communicating with the cloud. This procedure involves a TLS handshake that might take up to three seconds. The API blocks for the duration of the handshake.

The cloud uses the certificates of the device for authentication. See Updating the nRF Cloud certificate and the Modem key management library for more information on modem credentials. The certificates are generated using the device ID and PIN or HWID. The device ID is also the MQTT client ID. There are multiple configuration options for the device or client ID. See Configuration options for device ID for more information.

As the next step, the API subscribes to an MQTT topic to start receiving user association requests from the cloud.

Every time nRF Cloud starts a communication session with a device, it verifies whether the device is uniquely associated with a user. If not, the user association procedure is triggered. When adding the device to an nRF Cloud account, the user must provide the correct device ID and PIN (for Thingy:91 and custom hardware) or HWID (for nRF9160 DK) to nRF Cloud.

The following message sequence chart shows the flow of events and the expected application responses to each event during the user association procedure:

The chart shows the sequence of successful user association of an unassociated device.

Note

Currently, nRF Cloud requires that communication is re-established to update the device’s permission to send user data. The application must disconnect using nrf_cloud_disconnect() and then reconnect using nrf_cloud_connect().

When the device is successfully associated with a user on the cloud, subsequent connections to the cloud (also across power cycles) occur in the following sequence:

After receiving NRF_CLOUD_EVT_READY, the application can start sending sensor data to the cloud.

Configuration options for device ID

• CONFIG_NRF_CLOUD_CLIENT_ID_SRC_IMEI - If you enable this option, the ID is automatically generated using a prefix and the modem’s IMEI (<prefix><IMEI>). You can configure the prefix by using CONFIG_NRF_CLOUD_CLIENT_ID_PREFIX. The default format of the prefix is nrf- and it is valid only for Nordic devices such as Thingy:91 or nRF9160 DK. For custom hardware, use a prefix other than nrf- by modifying CONFIG_NRF_CLOUD_CLIENT_ID_PREFIX.

• CONFIG_NRF_CLOUD_CLIENT_ID_SRC_INTERNAL_UUID - If you enable this option, the ID is automatically generated using the modem’s 128-bit internal UUID, which results in a 32-character string with no hyphens. This option requires modem firmware v1.3.0 or higher.

• CONFIG_NRF_CLOUD_CLIENT_ID_SRC_COMPILE_TIME - If you enable this option, the ID is set at compile time using the value specified by CONFIG_NRF_CLOUD_CLIENT_ID.

• CONFIG_NRF_CLOUD_CLIENT_ID_SRC_RUNTIME - If you enable this option, the ID is set at run time. If the nRF Cloud library is used directly, set the NULL-terminated ID string in nrf_cloud_init_param when calling nrf_cloud_init(). If the generic Cloud API is used, set the ID in cloud_backend_config and then call cloud_init().

Firmware over-the-air (FOTA) updates

The nRF Cloud library supports FOTA updates for your nRF9160-based device. The CONFIG_NRF_CLOUD_FOTA option is enabled by default when CONFIG_NRF_CLOUD_MQTT is set. This enables FOTA functionality in the application.

nRF Cloud FOTA enables the following additional features and libraries:

• CONFIG_FOTA_DOWNLOAD enables FOTA download

• CONFIG_DFU_TARGET enables DFU target

• CONFIG_DOWNLOAD_CLIENT enables Download client

• CONFIG_FOTA_DOWNLOAD_PROGRESS_EVT

• CONFIG_REBOOT

• CONFIG_CJSON_LIB

For FOTA updates to work, the device must provide the information about the supported FOTA types to nRF Cloud. The device passes this information by writing a fota_v2 field containing an array of FOTA types into the serviceInfo field in the device’s shadow. nrf_cloud_service_info_json_encode() can be used to generate the proper JSON data to enable FOTA. Additionally, nrf_cloud_shadow_device_status_update() can be used to generate the JSON data and perform the shadow update.

Following are the three supported FOTA types:

• APP

• MODEM

• BOOT

For example, a device that supports all the FOTA types writes the following data into the device shadow:

{
"state": {
   "reported": {
      "device": {
         "serviceInfo": {
            "fota_v2": [
            "APP",
            "MODEM",
            "BOOT"
            ]
}}}}}

You can initiate FOTA updates through nRF Cloud or by using the nRF Cloud Device API. When the device receives the NRF_CLOUD_EVT_FOTA_DONE event, the application must perform any necessary cleanup, as a reboot will be initiated to complete the update. The message payload of the NRF_CLOUD_EVT_FOTA_DONE event contains the nrf_cloud_fota_type value. If the value equals NRF_CLOUD_FOTA_MODEM, the application can optionally avoid a reboot by performing reinitialization of the modem and calling the nrf_cloud_modem_fota_completed() function.

Building FOTA images

The build system will create the files dfu_application.zip and/or dfu_mcuboot.zip for a properly configured application. See Building FOTA images for more information about FOTA zip files.

When you use the files dfu_application.zip or dfu_mcuboot.zip to create an update bundle, the nRF Cloud UI populates the Name and Version fields from the manifest.json file contained within. However, you are free to change them as needed. The UI populates the Version field from only the nRF Connect SDK version field in the manifest.json file.

Alternatively, you can use the app_update.bin file to create an update bundle, but you need to enter the Name and Version fields manually. See nRF Cloud Getting Started FOTA documentation to learn how to create an update bundle.

Sending sensor data

The library offers two APIs, nrf_cloud_sensor_data_send() and nrf_cloud_sensor_data_stream() (lowest QoS), for sending sensor data to the cloud.

To view sensor data on nRF Cloud, the device must first inform the cloud what types of sensor data to display. The device passes this information by writing a ui field, containing an array of sensor types, into the serviceInfo field in the device’s shadow. nrf_cloud_service_info_json_encode() can be used to generate the proper JSON data to enable FOTA. Additionally, nrf_cloud_shadow_device_status_update() can be used to generate the JSON data and perform the shadow update.

Following are the supported UI types on nRF Cloud:

• GPS

• FLIP

• TEMP

• HUMIDITY

• AIR_PRESS

• RSRP

Removing the link between device and user

If you want to remove the link between a device and an nRF Cloud account, you must do this from nRF Cloud. A device cannot remove itself from an nRF Cloud account.

Using Cloud API with nRF Cloud library

You can use this library in conjunction with Cloud API. The following sections describe the various stages in the process of connection to nRF Cloud.

Initialization

To use a defined Cloud API backend, a binding must be obtained using the Cloud API function cloud_get_binding(), to which you can pass the name of the desired backend. The nRF Cloud library defines the Cloud API backend as NRF_CLOUD using the CLOUD_BACKEND_DEFINE macro.

The backend must be initialized using the cloud_init() function, with the binding, and a function pointer to user-defined Cloud API event handler as parameters. If cloud_init() returns success, the backend is ready for use. The return values for a failure scenario of the cloud_init() function are described below for the nRF Cloud backend:

• -EACCES - Invalid state. Already initialized.

• -EINVAL - Invalid event handler provided.

• -ENOMEM - Error building MQTT topics. The given client ID of the device could be too long.

Note

If CONFIG_NRF_CLOUD_PROVISION_CERTIFICATES is enabled, error values could be different or have different error descriptions.

Connecting to the Cloud

The nRF Cloud library offers two ways to handle backend connections when the cloud_connect() function is called. If you enable the CONFIG_NRF_CLOUD_CONNECTION_POLL_THREAD Kconfig option, a cloud backend thread monitors the connection socket. If you disable the option, the user application must monitor the socket.

The dual functionalities of the cloud_connect() function in the two scenarios are described below:

• CONFIG_NRF_CLOUD_CONNECTION_POLL_THREAD - If you enable this option, the function does not block and returns success if the connection monitoring thread has started. Below are some of the error codes that can be returned:

  • CLOUD_CONNECT_RES_ERR_NOT_INITD - Cloud backend is not initialized

  • CLOUD_CONNECT_RES_ERR_ALREADY_CONNECTED - Connection process has already been started

  Upon success, the monitoring thread sends an event of type CLOUD_EVT_CONNECTING to the user’s cloud event handler, with the err field set to success. If an error occurs, another event of the same type is sent, with the err field set to indicate the cause. These additional errors are described in the following section.

• CONFIG_NRF_CLOUD_CONNECTION_POLL_THREAD - If you disable this option, the function blocks and returns success when the MQTT connection to the cloud completes. The connection socket is set in the backend binding and it becomes available for the application to use. Below are some of the error codes that can be returned:

  • CLOUD_CONNECT_RES_ERR_NOT_INITD.

  • CLOUD_CONNECT_RES_ERR_NETWORK - Host cannot be found with the available network interfaces.

  • CLOUD_CONNECT_RES_ERR_BACKEND - A backend-specific error. In the case of nRF Cloud, this can indicate a FOTA initialization error.

  • CLOUD_CONNECT_RES_ERR_MISC - Error cause cannot be determined.

  • CLOUD_CONNECT_RES_ERR_NO_MEM - MQTT RX/TX buffers were not initialized.

  • CLOUD_CONNECT_RES_ERR_PRV_KEY - Invalid private key.

  • CLOUD_CONNECT_RES_ERR_CERT - Invalid CA or client certificate.

  • CLOUD_CONNECT_RES_ERR_CERT_MISC - Miscellaneous certificate error.

  • CLOUD_CONNECT_RES_ERR_TIMEOUT_NO_DATA - Timeout. Typically occurs when the inserted SIM card has no data.

  For both connection methods, when a device with JITP certificates attempts to connect to nRF Cloud for the first time, the cloud rejects the connection attempt so that it can provision the device. When this occurs, the Cloud API generates a CLOUD_EVT_DISCONNECTED event with the err field set to CLOUD_DISCONNECT_INVALID_REQUEST. The device must restart the connection process upon receipt of the CLOUD_EVT_DISCONNECTED event.

Connected to the Cloud

When the device connects to the cloud successfully, the Cloud API dispatches a CLOUD_EVT_CONNECTED event. If the device is not associated with an nRF Cloud account, a CLOUD_EVT_PAIR_REQUEST event is generated. The device must wait until it is added to an account, which is indicated by the CLOUD_EVT_PAIR_DONE event. If a device pair request is received, the device must disconnect and reconnect after receiving the CLOUD_EVT_PAIR_DONE event. This is necessary because the updated policy of the cloud becomes effective only on a new connection. Following the CLOUD_EVT_PAIR_DONE event, the Cloud API sends a CLOUD_EVT_READY event to indicate that the cloud is ready to receive data from the device.

Disconnection from the Cloud

The user application can generate a disconnect request with the cloud_disconnect() function. A successful disconnection is indicated by the CLOUD_EVT_DISCONNECTED event. The err field in the event message is set to CLOUD_DISCONNECT_USER_REQUEST. If an unexpected disconnect event is received, the err field contains the cause. If CONFIG_NRF_CLOUD_CONNECTION_POLL_THREAD is not enabled, the only cause of disconnection is CLOUD_DISCONNECT_MISC. The user application must use the connection socket to determine a reason.

The following events can cause disconnection if the backend thread is monitoring the socket:

• CLOUD_DISCONNECT_CLOSED_BY_REMOTE - The connection was closed by the cloud (POLLHUP).

• CLOUD_DISCONNECT_INVALID_REQUEST - The connection is no longer valid (POLLNVAL).

• CLOUD_DISCONNECT_MISC - Miscellaneous error (POLLERR).

Location services

nRF Cloud offers location services that allow you to obtain the location of your device. The following enhancements to this library can be used to interact with nRF Cloud Location Services:

• Assisted GPS - nRF Cloud A-GPS

• Predicted GPS - nRF Cloud P-GPS

• Cellular Positioning - nRF Cloud cellular positioning

• nRF Cloud REST - nRF Cloud REST

API documentation

Header file: include/net/nrf_cloud.h

Source files: subsys/net/lib/nrf_cloud/src/

group nrf_cloud

Defines

IS_VALID_USER_TAG(tag)

Determines if an MQTT message ID is a user specified tag to be used for ACK matching

NRF_CLOUD_SETTINGS_NAME

nRF Cloud’s string identifier for persistent settings

NRF_CLOUD_SETTINGS_FOTA_KEY

NRF_CLOUD_SETTINGS_FOTA_JOB

NRF_CLOUD_SETTINGS_FULL_FOTA

String used when defining a settings handler for FOTA

NRF_CLOUD_SETTINGS_FULL_FOTA_JOB

String used when saving FOTA job info to settings

NRF_CLOUD_FOTA_VER

Current FOTA version number

NRF_CLOUD_FOTA_VER_STR

Current FOTA version string used in device shadow

NRF_CLOUD_STAGE_ID_MAX_LEN

Max length of nRF Cloud’s stage/environment name

NRF_CLOUD_TENANT_ID_MAX_LEN

Max length of a tenant ID on nRF Cloud

NRF_CLOUD_CLIENT_ID_MAX_LEN

Max length of a device’s MQTT client ID (device ID) on nRF Cloud

NRF_CLOUD_JWT_VALID_TIME_S_MAX

Maximum valid duration for JWTs generated by nrf_cloud_jwt_generate

NRF_CLOUD_JWT_VALID_TIME_S_DEF

Default valid duration for JWTs generated by nrf_cloud_jwt_generate

NRF_CLOUD_FOTA_JOB_ID_SIZE

Size of nRF Cloud FOTA job ID; version 4 UUID: 32 bytes, 4 hyphens, NULL

Typedefs

typedef void (*nrf_cloud_event_handler_t)(const struct nrf_cloud_evt *evt)

Event handler registered with the module to handle asynchronous events from the module.

Param evt

[in] The event and any associated parameters.

Enums

enum nrf_cloud_evt_type

Asynchronous nRF Cloud events notified by the module.

Values:

enumerator NRF_CLOUD_EVT_TRANSPORT_CONNECTED

The transport to the nRF Cloud is established.

enumerator NRF_CLOUD_EVT_TRANSPORT_CONNECTING

In the process of connecting to nRF Cloud.

enumerator NRF_CLOUD_EVT_USER_ASSOCIATION_REQUEST

There was a request from nRF Cloud to associate the device with a user on the nRF Cloud.

enumerator NRF_CLOUD_EVT_USER_ASSOCIATED

The device is successfully associated with a user.

enumerator NRF_CLOUD_EVT_READY

The device can now start sending sensor data to the cloud.

enumerator NRF_CLOUD_EVT_RX_DATA

The device received data from the cloud.

enumerator NRF_CLOUD_EVT_SENSOR_DATA_ACK

The data sent to the cloud was acknowledged.

enumerator NRF_CLOUD_EVT_TRANSPORT_DISCONNECTED

The transport was disconnected.

enumerator NRF_CLOUD_EVT_FOTA_START

A FOTA update has started.

enumerator NRF_CLOUD_EVT_FOTA_DONE

The device should be restarted to apply a firmware upgrade

enumerator NRF_CLOUD_EVT_FOTA_ERROR

An error occurred during the FOTA update.

enumerator NRF_CLOUD_EVT_ERROR

There was an error communicating with the cloud.

enum nrf_cloud_disconnect_status

@ nRF Cloud disconnect status.

Values:

enumerator NRF_CLOUD_DISCONNECT_USER_REQUEST

enumerator NRF_CLOUD_DISCONNECT_CLOSED_BY_REMOTE

enumerator NRF_CLOUD_DISCONNECT_INVALID_REQUEST

enumerator NRF_CLOUD_DISCONNECT_MISC

enumerator NRF_CLOUD_DISCONNECT_COUNT

enum nrf_cloud_connect_result

@ nRF Cloud connect result.

Values:

enumerator NRF_CLOUD_CONNECT_RES_SUCCESS

enumerator NRF_CLOUD_CONNECT_RES_ERR_NOT_INITD

enumerator NRF_CLOUD_CONNECT_RES_ERR_INVALID_PARAM

enumerator NRF_CLOUD_CONNECT_RES_ERR_NETWORK

enumerator NRF_CLOUD_CONNECT_RES_ERR_BACKEND

enumerator NRF_CLOUD_CONNECT_RES_ERR_MISC

enumerator NRF_CLOUD_CONNECT_RES_ERR_NO_MEM

enumerator NRF_CLOUD_CONNECT_RES_ERR_PRV_KEY

Invalid private key

enumerator NRF_CLOUD_CONNECT_RES_ERR_CERT

Invalid CA or client cert

enumerator NRF_CLOUD_CONNECT_RES_ERR_CERT_MISC

Other cert issue

enumerator NRF_CLOUD_CONNECT_RES_ERR_TIMEOUT_NO_DATA

Timeout, SIM card may be out of data

enumerator NRF_CLOUD_CONNECT_RES_ERR_ALREADY_CONNECTED

enum nrf_cloud_error

@ nRF Cloud error codes.

Values:

enumerator NRF_CLOUD_ERROR_UNKNOWN

enumerator NRF_CLOUD_ERROR_NONE

enumerator NRF_CLOUD_ERROR_BAD_REQUEST

enumerator NRF_CLOUD_ERROR_INVALID_CERT

enumerator NRF_CLOUD_ERROR_DISSOCIATE

enumerator NRF_CLOUD_ERROR_ACCESS_DENIED

enumerator NRF_CLOUD_ERROR_DEV_ID_IN_USE

enumerator NRF_CLOUD_ERROR_INVALID_OWNER_CODE

enumerator NRF_CLOUD_ERROR_DEV_NOT_ASSOCIATED

enumerator NRF_CLOUD_ERROR_DATA_NOT_FOUND

enumerator NRF_CLOUD_ERROR_NRF_DEV_NOT_FOUND

enumerator NRF_CLOUD_ERROR_NO_DEV_NOT_PROV

enumerator NRF_CLOUD_ERROR_NO_DEV_DISSOCIATE

enumerator NRF_CLOUD_ERROR_NO_DEV_DELETE

enumerator NRF_CLOUD_ERROR_BAD_RANGE

enumerator NRF_CLOUD_ERROR_VALIDATION

enumerator NRF_CLOUD_ERROR_INTERNAL_SERVER

enum nrf_cloud_sensor

Sensor types supported by the nRF Cloud.

Values:

enumerator NRF_CLOUD_SENSOR_GPS

The GPS sensor on the device.

enumerator NRF_CLOUD_SENSOR_FLIP

The FLIP movement sensor on the device.

enumerator NRF_CLOUD_SENSOR_BUTTON

The Button press sensor on the device.

enumerator NRF_CLOUD_SENSOR_TEMP

The TEMP sensor on the device.

enumerator NRF_CLOUD_SENSOR_HUMID

The Humidity sensor on the device.

enumerator NRF_CLOUD_SENSOR_AIR_PRESS

The Air Pressure sensor on the device.

enumerator NRF_CLOUD_SENSOR_AIR_QUAL

The Air Quality sensor on the device.

enumerator NRF_CLOUD_LTE_LINK_RSRP

The RSPR data obtained from the modem.

enumerator NRF_CLOUD_DEVICE_INFO

The descriptive DEVICE data indicating its status.

enumerator NRF_CLOUD_SENSOR_LIGHT

The light sensor on the device.

enum nrf_cloud_topic_type

Topic types supported by nRF Cloud.

Values:

enumerator NRF_CLOUD_TOPIC_STATE

Endpoint used to update the cloud-side device shadow state .

enumerator NRF_CLOUD_TOPIC_MESSAGE

Endpoint used to directly message the nRF Cloud Web UI.

enumerator NRF_CLOUD_TOPIC_BULK

Endpoint used to publish bulk messages to nRF Cloud. Bulk messages combine multiple messages into a single message that will be unwrapped and re-published to the message topic in the nRF Cloud backend.

enum nrf_cloud_fota_status

FOTA status reported to nRF Cloud.

Values:

enumerator NRF_CLOUD_FOTA_QUEUED

enumerator NRF_CLOUD_FOTA_IN_PROGRESS

enumerator NRF_CLOUD_FOTA_FAILED

enumerator NRF_CLOUD_FOTA_SUCCEEDED

enumerator NRF_CLOUD_FOTA_TIMED_OUT

enumerator NRF_CLOUD_FOTA_CANCELED

enumerator NRF_CLOUD_FOTA_REJECTED

enumerator NRF_CLOUD_FOTA_DOWNLOADING

enum nrf_cloud_fota_type

FOTA update type.

Values:

enumerator NRF_CLOUD_FOTA_TYPE__FIRST

enumerator NRF_CLOUD_FOTA_APPLICATION

Application update.

enumerator NRF_CLOUD_FOTA_MODEM

Modem update.

enumerator NRF_CLOUD_FOTA_BOOTLOADER

Bootloader update.

enumerator NRF_CLOUD_FOTA_TYPE__INVALID

enum nrf_cloud_fota_validate_status

Validity of an in-progress/installed FOTA update

Values:

enumerator NRF_CLOUD_FOTA_VALIDATE_NONE

enumerator NRF_CLOUD_FOTA_VALIDATE_PENDING

enumerator NRF_CLOUD_FOTA_VALIDATE_PASS

enumerator NRF_CLOUD_FOTA_VALIDATE_FAIL

enumerator NRF_CLOUD_FOTA_VALIDATE_UNKNOWN

enumerator NRF_CLOUD_FOTA_VALIDATE_DONE

enum nrf_cloud_fota_bootloader_status_flags

Status flags for tracking the update process of the b1 bootloader (MCUBOOT)

Values:

enumerator NRF_CLOUD_FOTA_BL_STATUS_CLEAR

enumerator NRF_CLOUD_FOTA_BL_STATUS_S0_FLAG_SET

enumerator NRF_CLOUD_FOTA_BL_STATUS_S0_WAS_ACTIVE

enumerator NRF_CLOUD_FOTA_BL_STATUS_REBOOTED

enum nrf_cloud_shadow_info

How the info sections are handled when encoding shadow data.

Values:

enumerator NRF_CLOUD_INFO_NO_CHANGE

Data will not be modified

enumerator NRF_CLOUD_INFO_SET

Data will be set/updated

enumerator NRF_CLOUD_INFO_CLEAR

Data section will be cleared

Functions

int nrf_cloud_init(const struct nrf_cloud_init_param *param)

Initialize the module.

Warning

This API must be called prior to using nRF Cloud and it must return successfully.

Parameters

• param – [in] Initialization parameters.

Return values

• 0 – If successful.

• -EACCES – Already initialized or nrf_cloud_uninit is in progress. Otherwise, a (negative) error code is returned.

int nrf_cloud_uninit(void)

Uninitialize nRF Cloud; disconnects cloud connection and cleans up allocated memory.

Note

If nRF Cloud FOTA is enabled and a FOTA job is active uninit will not be performed.

Return values

• 0 – If successful.

• -EBUSY – If a FOTA job is in progress. Otherwise, a (negative) error code is returned.

int nrf_cloud_connect(const struct nrf_cloud_connect_param *param)

Connect to the cloud.

In any stage of connecting to the cloud, an NRF_CLOUD_EVT_ERROR might be received. If it is received before NRF_CLOUD_EVT_TRANSPORT_CONNECTED, the application may repeat the call to nrf_cloud_connect to try again.

Parameters

• param – [in] Parameters to be used for the connection.

Return values

Connect – result defined by enum nrf_cloud_connect_result.

int nrf_cloud_sensor_data_send(const struct nrf_cloud_sensor_data *param)

Send sensor data reliably.

This API should only be called after receiving an NRF_CLOUD_EVT_READY event. If the API succeeds, you can expect the NRF_CLOUD_EVT_SENSOR_DATA_ACK event for data sent with a valid tag value.

Parameters

• param – [in] Sensor data; the data pointed to by param->data.ptr must be a string.

Return values

• 0 – If successful.

• -EACCES – Cloud connection is not established; wait for NRF_CLOUD_EVT_READY. Otherwise, a (negative) error code is returned.

int nrf_cloud_shadow_update(const struct nrf_cloud_sensor_data *param)

Update the device shadow with sensor data.

Parameters

• param – [in] Sensor data; the data pointed to by param->data.ptr must be a valid JSON string.

Return values

• 0 – If successful.

• -EACCES – Cloud connection is not established; wait for NRF_CLOUD_EVT_READY. Otherwise, a (negative) error code is returned.

int nrf_cloud_shadow_device_status_update(const struct nrf_cloud_device_status *const dev_status)

Update the device status in the shadow.

Parameters

• dev_status – [in] Device status to be encoded.

Return values

• 0 – If successful.

• -EACCES – Cloud connection is not established; wait for NRF_CLOUD_EVT_READY. Otherwise, a (negative) error code is returned.

int nrf_cloud_sensor_data_stream(const struct nrf_cloud_sensor_data *param)

Stream sensor data. Uses lowest QoS; no acknowledgment,.

This API should only be called after receiving an NRF_CLOUD_EVT_READY event.

Parameters

• param – [in] Sensor data; tag value is ignored.

Return values

• 0 – If successful.

• -EACCES – Cloud connection is not established; wait for NRF_CLOUD_EVT_READY. Otherwise, a (negative) error code is returned.

int nrf_cloud_send(const struct nrf_cloud_tx_data *msg)

Send data to nRF Cloud.

This API is used to send pre-encoded data to nRF Cloud.

Parameters

• msg – [in] Pointer to a structure containting data and topic information.

Return values

• 0 – If successful.

• -EACCES – Cloud connection is not established; wait for NRF_CLOUD_EVT_READY. Otherwise, a (negative) error code is returned.

int nrf_cloud_disconnect(void)

Disconnect from the cloud.

This API may be called any time after receiving the NRF_CLOUD_EVT_TRANSPORT_CONNECTED event. If the API succeeds, you can expect the NRF_CLOUD_EVT_TRANSPORT_DISCONNECTED event.

Return values

• 0 – If successful.

• -EACCES – Cloud connection is not established; wait for NRF_CLOUD_EVT_TRANSPORT_CONNECTED. Otherwise, a (negative) error code is returned.

int nrf_cloud_process(void)

Function that must be called periodically to keep the module functional.

Return values

0 – If successful. Otherwise, a (negative) error code is returned.

int nrf_cloud_modem_fota_completed(const bool fota_success)

The application has handled re-init after a modem FOTA update and the LTE link has been re-established. This function must be called in order to complete the modem update.

Parameters

• fota_success – [in] true if modem update was successful, false otherwise.

Return values

0 – If successful. Otherwise, a (negative) error code is returned.

int nrf_cloud_service_info_json_encode(const struct nrf_cloud_svc_info *const svc_inf, cJSON *const svc_inf_obj)

Add service info into the provided cJSON object.

Parameters

• svc_inf – [in] Service info to add.

• svc_inf_obj – [inout] cJSON object to which service info will be added.

Return values

0 – If successful. Otherwise, a (negative) error code is returned.

int nrf_cloud_modem_info_json_encode(const struct nrf_cloud_modem_info *const mod_inf, cJSON *const mod_inf_obj)

Add modem info into the provided cJSON object.

Note

To add modem info, CONFIG_MODEM_INFO must be enabled.

Parameters

• mod_inf – [in] Modem info to add.

• mod_inf_obj – [inout] cJSON object to which modem info will be added.

Return values

0 – If successful. Otherwise, a (negative) error code is returned.

int nrf_cloud_client_id_get(char *id_buf, size_t id_len)

Function to retrieve the current device ID.

Parameters

• id_buf – [inout] Buffer to receive the device ID.

• id_len – [in] Size of buffer (NRF_CLOUD_CLIENT_ID_MAX_LEN).

Return values

0 – If successful. Otherwise, a (negative) error code is returned.

int nrf_cloud_tenant_id_get(char *id_buf, size_t id_len)

Function to retrieve the current customer tenant ID.

Parameters

• id_buf – [inout] Buffer to receive the tenant ID.

• id_len – [in] Size of buffer (NRF_CLOUD_TENANT_ID_MAX_LEN).

Return values

0 – If successful. Otherwise, a (negative) error code is returned.

int nrf_cloud_jwt_generate(uint32_t time_valid_s, char *const jwt_buf, size_t jwt_buf_sz)

Function to generate a JWT to be used with nRF Cloud’s REST API. This library’s configured values for client id and sec tag (NRF_CLOUD_SEC_TAG) will be used for generating the JWT.

Parameters

• time_valid_s – [in] How long (seconds) the JWT will be valid. Maximum duration specified by NRF_CLOUD_JWT_VALID_TIME_S_MAX. If zero, NRF_CLOUD_JWT_VALID_TIME_S_DEF will be used.

• jwt_buf – [inout] Buffer to hold the JWT.

• jwt_buf_sz – [in] Size of the buffer (recommended size >= 600 bytes).

Return values

• 0 – JWT generated successfully.

• -ETIME – Modem does not have valid date/time, JWT not generated.

Returns

A negative value indicates an error.

int nrf_cloud_pending_fota_job_process(struct nrf_cloud_settings_fota_job *const job, bool *const reboot_required)

Function to process/validate a pending FOTA update job. Typically the job information is read from non-volatile storage on startup. This function is intended to be used by custom REST-based FOTA implementations. It is called internally if CONFIG_NRF_CLOUD_FOTA is enabled.

Parameters

• job – [in] FOTA job state information.

• reboot_required – [out] A reboot is needed to complete a FOTA update.

Return values

• 0 – A Pending FOTA job has been processed.

• -ENODEV – No pending/unvalidated FOTA job exists.

Returns

A negative value indicates an error.

int nrf_cloud_bootloader_fota_slot_set(struct nrf_cloud_settings_fota_job *const job)

Function to set the active bootloader (B1) slot flag which is needed to validate a bootloader FOTA update. For proper functionality, CONFIG_FOTA_DOWNLOAD must be enabled.

Parameters

• job – [inout] FOTA job state information.

Return values

0 – Flag set successfully or not a bootloader FOTA update.

Returns

A negative value indicates an error.

int nrf_cloud_handle_error_message(const char *const buf, const char *const app_id, const char *const msg_type, enum nrf_cloud_error *const err)

Function to check for a JSON error message in data received from nRF Cloud via MQTT.

Parameters

• buf – [in] Data received from nRF Cloud.

• app_id – [in] appId value to check for. Set to NULL to skip appID check.

• msg_type – [in] messageType value to check for. Set to NULL to skip messageType check.

• err – [out] Error code found in message.

Return values

• 0 – Error code found (and matched app_id and msg_type if provided).

• -ENOENT – Error code found, but did not match specified app_id and msg_type.

• -ENOMSG – No error code found.

• -EBADMSG – Invalid error code data format.

Returns

A negative value indicates an error.

struct nrf_cloud_fota_job_info

#include <nrf_cloud.h>

Common FOTA job info.

Public Members

char *id

Null-terminated FOTA job identifier

struct nrf_cloud_settings_fota_job

#include <nrf_cloud.h>

FOTA job info provided to the settings module to track FOTA job status.

struct nrf_cloud_data

#include <nrf_cloud.h>

Generic encapsulation for any data that is sent to the cloud.

Public Members

uint32_t len

Length of the data.

const void *ptr

Pointer to the data.

struct nrf_cloud_topic

#include <nrf_cloud.h>

MQTT topic.

Public Members

uint32_t len

Length of the topic.

const void *ptr

Pointer to the topic.

struct nrf_cloud_sensor_list

#include <nrf_cloud.h>

Sensors that are supported by the device.

Public Members

uint8_t size

Size of the list.

enum nrf_cloud_sensor *ptr

Supported sensor types.

struct nrf_cloud_connect_param

#include <nrf_cloud.h>

Connection parameters.

Public Members

const struct nrf_cloud_sensor_list *sensor

Supported sensor types. May be NULL.

struct nrf_cloud_sensor_data

#include <nrf_cloud.h>

Sensor data transmission parameters.

Public Members

enum nrf_cloud_sensor type

The sensor that is the source of the data.

struct nrf_cloud_data data

Sensor data to be transmitted.

uint16_t tag

Unique tag to identify the sent data. Can be used to match acknowledgment on the NRF_CLOUD_EVT_SENSOR_DATA_ACK event. Valid range: NCT_MSG_ID_USER_TAG_BEGIN to NCT_MSG_ID_USER_TAG_END. Any other value will suppress the NRF_CLOUD_EVT_SENSOR_DATA_ACK event.

struct nrf_cloud_evt

#include <nrf_cloud.h>

Asynchronous events received from the module.

Public Members

enum nrf_cloud_evt_type type

The event that occurred.

uint32_t status

Any status associated with the event.

struct nrf_cloud_data data

Received data.

struct nrf_cloud_topic topic

Topic on which data was received.

struct nrf_cloud_tx_data

#include <nrf_cloud.h>

Structure used to send pre-encoded data to nRF Cloud.

Public Members

struct nrf_cloud_data data

Data that is to be published.

enum nrf_cloud_topic_type topic_type

Endpoint topic type published to.

enum mqtt_qos qos

Quality of Service of the message.

struct nrf_cloud_svc_info_fota

#include <nrf_cloud.h>

Controls which values are added to the FOTA array in the “serviceInfo” shadow section.

struct nrf_cloud_svc_info_ui

#include <nrf_cloud.h>

Controls which values are added to the UI array in the “serviceInfo” shadow section.

Public Members

uint8_t temperature

Items with UI support on nRF Cloud

uint8_t air_quality

Items without UI support on nRF Cloud

struct nrf_cloud_modem_info

#include <nrf_cloud.h>

Modem info data and which sections should be encoded.

struct nrf_cloud_svc_info

#include <nrf_cloud.h>

Structure to specify which components are added to the encoded service info object.

Public Members

struct nrf_cloud_svc_info_fota *fota

Specify FOTA components to enable, set to NULL to remove the FOTA entry

struct nrf_cloud_svc_info_ui *ui

Specify UI components to enable, set to NULL to remove the UI entry

struct nrf_cloud_device_status

#include <nrf_cloud.h>

Structure to specify which components are added to the encoded device status object.

Public Members

struct nrf_cloud_modem_info *modem

Specify which modem info components to include, set to NULL to skip

struct nrf_cloud_svc_info *svc

Specify which service info components to include, set to NULL to skip

struct nrf_cloud_init_param

#include <nrf_cloud.h>

Initialization parameters for the module.

Public Members

nrf_cloud_event_handler_t event_handler

Event handler that is registered with the module.

char *client_id

NULL-terminated MQTT client ID string. Must not exceed NRF_CLOUD_CLIENT_ID_MAX_LEN. Must be set if NRF_CLOUD_CLIENT_ID_SRC_RUNTIME is enabled; otherwise, NULL.