Leviton/HAI doesn't manufacturer a solution for hydronic driveway heating but you could use an outdoor temperature sensor and relay through the OP to control a valve for your boiler piping but you would still need some way of detecting snom/ice, possibly a conductivity sensor or a pair of IR detectors, although manual operation would seem to make more sense to avoid energy wasting errors. There are snow detectors, but using one of those means you don't need the Omnipro to manage snow melting.
Keep in mind using a thermostat is not the same as detecting snow. You could heat the driveway for weeks or months with no snow.
Don't forget to add anti-freeze to your boiler system to keep the circulating water from freezing. Run-off direction and avoiding water pooling is also important as melted water will refreeze - and as Larry pointed, out, ice is bad. Your piping needs to be in full contact with the asphalt or concrete to maximize heat transfer and minimize air gap insulation. Stone and brick driveways don't work well, so don't bother. I use heat-tape on the angle iron track for my sliding gate since the gate won't open when covered with ice or packed snow.
Pre-manufactured driveway heating kits can be more efficient on energy use than DIY. There are several companies that make such kits as well as mats and even gutter ice melting solutions that could be tied into your OP panel. None of those are really designed for use with the OP since they have their own controllers.