Avnet AT&T Cellular IoT Kit, Руководство по началу работы

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Appendix D: Data Processing in Flow
When data is sent from the WNC-Shield sensors to Flow, it enters via a HTTP-IN GET port.
From here, it goes through a number of nodes. On the Flow Data canvas, the M2X lead-in
function is where data enters. Double-click the bubble to open it.
Scroll to the bottom of the JavaScript content. This is the function that composes the POST
message for M2X. This function contains the sensor fields that get extracted from the incoming
payload.
Note : If attempting to POST to an M2X stream that does not exist, an error is generated.