No, as mentioned briefly in the linked Github repo, I went with an Arduino with integrated LTE modem.   So, the data travels: (sensor) - cable - (Arduino) - LTE 4G - internet - (RestDB.io), from where it is retrieved by the HC2 through intermittent polling of its REST API.    It's a bit of a round-trip, but the data is also displayed on a website so I needed it available outside HC2 on a reliable backend.    (I'm the son @knuth mentioned)
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