Sierra Wireless (NASDAQ:SWIR) hasn't done much to justify its potential despite being a pure-play Internet of Things (IoT) company. But it looks like things are finally changing for the better. In early August, the IoT specialist posted impressive second-quarter results that arrived at the higher end of Wall Street's expectations, and its outlook was solid enough to boost investor confidence. The chipmaker is on track to post yet another quarter of solid double-digit top-line growth, and it won't be surprising if it sustains this momentum in the long run thanks to the two fast-growing businesses that have been critical to its turnaround.

Icons representing different components of the Internet of Things are shown in a honeycomb design.

Image Source: Getty Images.

What's working?

Sierra's OEM (original equipment manufacturer) solutions business supplied nearly three-fourths of the company's total revenue last quarter, but it grew a modest 4.5% compared to the prior-year period.

Rapid growth in the chipmaker's enterprise solutions and IoT services businesses was the real reason its overall revenue shot up 16.4% year over year to $201.9 million. The company's enterprise solutions revenue increased 41% from last year, while IoT services revenue more than tripled. These two businesses now account for a fourth of Sierra's total revenue, and they look all set to play bigger roles in driving the company's growth.

Sierra is tapping the industrial and automotive markets through its enterprise solutions business. The company's AirLink routers, which are better known as IoT routers, play an important role in enabling machine-to-machine communication in devices that require constant internet connectivity. Not surprisingly, demand for these routers is expected to grow substantially in the future as more devices connect to the internet, with one estimate putting the size of the wireless router market at $16 billion in 2025, compared $8.5 billion last year.

The good part: Sierra is gaining impressive traction here, as its recent design wins suggest. Industrial equipment giant Atlas Copco selected its solutions a few months ago to deploy preventive maintenance in its factories. Sierra's enterprise products are also being deployed by truck fleet operators for vehicle tracking, which is another fast-growing space that's expected to nearly double by 2024 compared to 2016 levels.

On the other hand, Sierra's IoT services business is a play on the growing deployment of IoT devices, which will need software and other related services for managing IoT applications in the cloud. Not surprisingly, half of the company's potential contracts in the services business originate from its other two segments, which is why it carries a strong margin profile -- one that should help the company's margins in the long run.

Gearing up for bottom line growth

Sierra's non-GAAP gross margin was almost flat last quarter at 34.4%, but it shouldn't be long before it goes up a few notches thanks to the superior margin profile of its two growing businesses. The enterprise solutions business, for instance, reported 50% non-GAAP gross margin last quarter, while that of IoT services stood at 41.1%.

In fact, the gross margins of both these businesses segments easily eclipse that of the OEM solutions business' gross margin of 30.4%. So, as the enterprise and the IoT services businesses gain more clout at Sierra Wireless, they should be able to boost the company's earnings. This is probably why analysts expect Sierra's earnings to grow in the high teens for the next five years, which makes it a nice bet given that it is trading at 15 times forward earnings.

What's more, investors can expect the OEM solutions business to pick up the pace starting in 2019 when its contract with Volkswagen kicks in. So Sierra Wireless investors can be confident that the company can now clock higher growth rates after enduring tough times over the past couple of years.

Harsh Chauhan has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Sierra Wireless. The Motley Fool has a disclosure policy.