os.loadAPI("ocs/apis/sensor")
local sense = sensor.wrap("top") --replace top with actual side

while true do
  --get reactor data
  local reactorData = sense.getTargetDetails("-1,4,-3") --replace coordinates with actual coordinates.
  --you can use sensorview to figure out what you need to index in the details table
  print(reactorData.Heat)
  sleep(0.5)
end