There are regular buses - every 10 min - from Bangalore to Tumkur. “Nonstop / Flyover” buses take 1.30 hrs.
During the Anthillhacks days, we try to collect people from Kyatsandra (stop before Tumkur) and bring them to Anterras - the camp location which is a 20 min ride through the forest.
Directions to iruWay http://j.mp/antz-farm
Driving directions can be found with destination: Devarayanadurga