Cloud functions


Since 6.1.0:

Request a ledger from the cloud. Returns a Ledger object to read or write the data in the ledger.

This operation is asynchronous and the data will not be available until synchronized with the cloud. You will typically call this from setup() and you can do so before connected to the cloud.

The type of ledger (device-to-cloud or cloud-to-device), as well as the ledger scope (organization, product, or device) is determined when the ledger is created on the cloud side, so it is not specified when you request the ledger. You must first create a ledger definition in the cloud; you cannot create a new ledger definition using the device-side API.

The first time a device comes online specifying a device to cloud ledger, a new ledger instance will be created for the device, however.

Ledger names consist only of lowercase alphanumeric and dash, up to 32 characters, and are unique across all scopes.

Ledger ledger(const char* name);

Ledger sensors;

void setup() {
    sensors = Particle.ledger("sensors");