How to use the url command in a .bib file with biblatex

Question

In this question, the top answers suggests using the url package within a .bib file.

I am using Overleaf and I am trying to include the url command in my .bib file, but it is just being printed out as plain text.

For example in the file references.bib:

@article{sensorSum,
    author = "Donghai Guan and Tinghuai Ma and Weiwei Yuan and Young-Koo Lee and A. M. Jehad Sarkar",
    title = "Review of Sensor-based Activity Recognition Systems",
    journal = "IETE Technical Review",
    volume = "28",
    year = "2011",
    DOI = {\url{https://doi.org/10.4103/0256-4602.85975}}
}

gets printed in my bibliography as:

[3] D. Guan, T. Ma, W. Yuan, Y.-K. Lee, and A. M. J. Sarkar, “Review of sensor-based activity recognition systems,” IETE Technical Review, vol. 28, 2011. DOI:\url{https://doi.org/10.4103/0256- 4602.85975}.

Here is the (shortened) tex file:

\documentclass[12pt,a4paper]{article}

\usepackage{url}

\usepackage[style=ieee,citestyle=ieee,dashed=false]{biblatex}
\addbibresource{references.bib}

\begin{document}
    Lots of text
    ...
    \cite{sensorSum}
    \newpage
    \printbibliography
\end{document}

How can I fix this?

Answer 1

All URI/verbatim-like fields (that includes url, doi and eprint) in biblatex should only contain the bare URI and no additional markup like \url. Additional macros in these fields may be interpreted incorrectly and can result in undesirable or wrong output and possibly even errors if things go really bad.

The doi field in particular should only contain the bare DOI and not the entire link, so the correct input would be

@article{sensorSum,
  author  = {Donghai Guan and Tinghuai Ma and Weiwei Yuan
             and Young-Koo Lee and A. M. Jehad Sarkar},
  title   = {Review of Sensor-based Activity Recognition Systems},
  journal = {IETE Technical Review},
  volume  = {28},
  year    = {2011},
  doi     = {10.4103/0256-4602.85975},
}

The output will automatically be linked to the correct URL if hyperref is loaded.