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. 2018 Nov 10;18(11):3868. doi: 10.3390/s18113868

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Main components of the testbed. (A) Orange Pi PC for performing energy measurements; (B) INA219 current sensors; (C) 5 V power supply; (D) ESP32 (mist end-device); (E) Orange Pi PC (fog gateway).