to growth, particularly in the video surveillance category. Sales through ADI’s e-commerce channel grew 24%, representing 17% of total ADI sales, and private brands sales grew over 40% compared to first quarter 2021.
Gross margin of 19.2% in the first quarter 2022 was up 200 basis points compared to first quarter 2021. This expansion was driven by ADI capturing the benefits of the current inflationary pricing environment, progress on ADI specific price optimization efforts and expansion of private brands. ADI is continuing to invest in and roll out tools to enable its sales team to better understand and serve customers, which has had significant benefit on sales efficiency. Operating profit of $80 million for first quarter 2022 was up 36% from $59 million in first quarter 2021, reaching 9% of revenue.
During the first quarter ADI saw significant growth in key adjacent categories of professional and residential audio visual and in data communications. In the first quarter, ADI completed the acquisition of Arrow Wire & Cable, a U.S. west coast distributor of data communications products. The acquisition complements the 2021 acquisition of Norfolk Wire & Electronics geographically, strengthening ADI’s position in a key strategic growth category. Arrow is the fourth acquisition for ADI since 2020.
First Quarter 2022 Performance
Consolidated revenue of $1.51 billion in the first quarter 2022 grew 6% compared with the prior year of $1.42 billion. Gross profit margin for the first quarter 2022 was 28.8%, up 290 basis points compared to 25.9% in the prior year. Resideo’s operating profit of $172 million in the first quarter 2022 compared to a prior year operating profit of $130 million. Total Corporate costs were $61 million, up from $59 million in the prior year primarily due to $10 million of one-time transaction costs associated with the First Alert acquisition. Net income for the first quarter 2022 was $87 million, or $0.58 per diluted common share, compared with $49 million, or $0.33 per diluted common share, in the prior year.
Cash Flow and Liquidity
First quarter 2022 net cash used by operating activities of $59 million compared to cash provided by operating activities of $5 million in the prior year comparable period. The use of cash was primarily due to typical seasonal timing of cash payments for bonus and customer rebate payments accrued in prior periods, higher working capital to support growth and a strategic decision to increase inventory levels. At April 2, 2022, Resideo had cash and cash equivalents of $244 million and total outstanding debt of $1.4 billion.