PLC = require('modbus')
socket = require('socket')

plc = PLC.Modbus("pi_daq",502)

function setup()
	if ( plc ) then
		print("OK")
	end
end

function loop()
	if ( plc ) then
		plc:sync();
		print(plc:getReal(1))
	end
	socket.sleep(0.5)
end

setup()

while 1 do
	loop()
end