# Smart Internet of Things Power Meter for Industrial and Domestic Applications
## 5 Conclusions  
By leveraging an experimental calibration technique and commonly available equipment, we successfully developed a device that is both accessible and cost-effective. This approach allowed us to achieve an overall measurement error of just 1.22%, comparable to dedicated industrial meters. This highlights the practicality and affordability of our method, making it an excellent solution for applications where specialized equipment is not accessible.  
The resulting device is compact and can be easily integrated in existing electrical cabinets, occupying only three modules on a DIN mounting rail. It integrates wired and wireless communication interfaces, multiple communication protocols, and a microSD slot for data logging and configuration purposes.  
From the perspective of future developments, we aim to  
* Increase the number of harmonics included in the analysis up to the 51 st;
* Calibrate the device using a specialized power calibrator;
* Develop a mobile application to allow the user to easily monitor the measured values and to change the device's parameters, such as Wi-Fi network name, password, or communication protocol parameters without removing the microSD card;
* Design a modular, three-phase version of the power meter (a CPU module and three additional modules, one for each network phase);
* Address the security aspects for industrial and end-user equipment: using an encrypted data channel and protocols (e.g., transmission over SSL); implementing a secure authentication mechanism to limit unwanted interactions with our device; considering researchers' recommendations on identified security threats, for example, the suggestions in [51; 52; 53];
* Implement more advanced mathematical methods to determine the THD and other parameters [54; 55; 56];
* Compare the results on various scenarios to comply with specific standards using specialized calibration equipment [57; 58; 59; 60; 61].  
The measurement device we have created features a flexible, modular hardware and software architecture for smart-grid systems. It can be adapted to three-phase systems and allow for parameter measurements, even for harmonics exceeding the thresholds specified in standards such as IEEE 519-2022 [59]. Furthermore, the device can facilitate the development of educational platforms designed for the electricity and smart metering fields [62].  
Conceptualization, A.-V.P. and D.-C.T.; methodology, A.-V.P. and D.R.; software, A.-V.P.; validation, A.-V.P., R.-V.R., and D.-C.T.; formal analysis, A.-V.P. and D.R.; investigation, D.-C.T.; resources, R.-V.R.; data curation, R.-V.R.; writing--original draft preparation, A.-V.P.; writing--review and editing, D.-C.T.; visualization, A.-V.P.; supervision, D.-C.T.; project administration, R.-V.R. and D.R.; funding acquisition, D.R. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author.  
The authors declare no conflicts of interest.