The Time Series endpoints are used for sending or receiving telemetry data. Once a Capability twin has been created that represents the time series, the telemetry associated with that twin can be created using either the twin's dtId (aka twinId) or externalId, a timestamp, and a value. Data is transmitted as an array so time series data can be batched and sent within a single request. Similarly, time series can be retreived for one or more Capability twins at a time using the twinId(s).