Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

Reshape Lifesciences, Inc.

San Clemente, California

We hereby consent to the incorporation by reference in the Prospectus constituting a part of this Registration Statement of our report dated March 12, 2021, relating to the consolidated financial statements of Obalon Therapeutics, Inc. appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.

We also consent to the reference to us under the caption “Experts” in the Prospectus.

/s/ BDO USA, LLP

Costa Mesa, California

September 3, 2021