Smith was one of the first players the Pistons targeted when they were able to begin speaking with free agents this week.
The 6-foot-9 Smith will join Greg Monroe and Andre Drummond in Detroit's front court and is expected to add a little bit of everything to the Pistons' lineup while providing some much-needed scoring punch.
In nine seasons with the Atlanta Hawks, Smith averaged 15.3 points, 8.0 rebounds, 3.2 assists and 2.1 blocks. He's a career 46-percent shooter.
Last season, Smith averaged 17.5 points 8.4 rebounds, 4.2 assists and 1.8 blocks.
Smith, 27, was the 17th overall pick in the 2004 NBA Draft. He was a second-team selection to the 2004-05 NBA All-Rookie team and made the All-Defensive second team in 2009-10.
Smith explored other options but there didn't seem to be too much of a market for him.
I have my reservations about the signing since Smith has a tendency to want to take too many jumpers, but I'll let it play out before saying it won't work out
Teams can't sign free agents until July 10.