Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

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We consent to the incorporation by reference in this Registration Statement on Form S-8 of CSP Inc. of our report dated December 8, 2022, relating to the consolidated financial statements, appearing in the Annual Report on Form 10-K of CSP Inc. for the year ended September 30, 2022.

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/s/ RSM US LLP

Miami, Florida

January 27, 2023