ComputerCraft remote fluid sensor script

local ccomp=4 -- Controlling computer
local modempos="left" -- Modem placement
local senspos="right" -- Sensor placement
local tankpos="-1,1,-1" -- Tank placement, relative to sensor
local reqstring="DREQ" -- Data request string
local dbgr=false -- Debug mode
local version="1.7" -- Version number, as string in case of finer point releases

print ("Remote Fluid Sensor v"..version.."\nBy Shurhaian\n")

os.loadAPI("ocs/apis/sensor") -- Load the sensors API
if dbgr then
  print ("Debug mode active\nSensors API loaded")
  sleep (0.5)
end
tank=sensor.wrap(senspos) -- ...and the tank sensor
if dbgr then
  print ("Sensor wrapped")
  sleep (0.5)
end

rednet.open(modempos) -- Open Rednet
if dbgr then
  print ("Channel open")
  sleep (0.5)
end

local compID=os.getComputerID()
print ("Modem position: "..modempos.."\nSensor position: "..senspos.."\nTank location: "..tankpos.."\n")
print ("Controlling computer: #"..ccomp.."\nRunning on computer: #"..compID.."\n")

local tankrep=nil -- Tank details
local fluid=0 -- Fluid amount, declared in advance

if dbgr then
  print ("Fetching tank details...\n")
  tankrep=tank.getTargetDetails(tankpos)
  print ("Details:\n-----\n"..textutils.serialize(tankrep).."\n-----")
  fluid=tankrep.Tanks[1].Amount
  print ("fluid amount: "..fluid)
else
  print ("Now active and listening...")
end

while not dbgr do
  message,id=myNet.receive()
  if id==ccomp and message==reqstring then
    tankrep=tank.getTargetDetails(tankpos)
    fluid=tankrep.Tanks[1].Amount
    myNet.send(fluid,ccomp)
  end
end