Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Amendment No. 1 to this Registration Statement No. 333-123549 on Form S-3 of Radiant Systems, Inc. of our report dated March 15, 2005 (which report expresses an unqualified opinion and includes an explanatory paragraph relating to the adoption of Statement of Financial Accounting Standards (“SFAS”) No. 142, Goodwill and Other Intangible Assets), relating to the financial statements and financial statement schedule of Radiant Systems, Inc and our report dated March 15, 2005 relating to management’s report on the effectiveness of internal control over financial reporting, appearing in the Annual Report on Form 10-K and Amendment No. 2 to Form 10-K, respectively, of Radiant Systems, Inc for the year ended December 31, 2004 and to the reference to us under the heading “Experts” in the Prospectus, which is part of this Registration Statement.

/s/ DELOITTE & TOUCHE LLP

Atlanta, Georgia

May 12, 2005