treefarm.lua

vos.loadApi('apis.lua')

Peripheral.wrap({ type = 'wireless_modem' })
Relay.find()

local active = false

--[[
local me = vos.loadApi('me.api')

while true do
  local count = me.getItemCount(13384, 0)
  print(count)

  local enabled = count < 2048

  print('setting output to ' ..
    tostring(not enabled))
  rs.setOutput('right', not enabled)
  os.sleep(30)
end
--]]

Message.addHandler('tankInfo', function(h, id, msg)
  local tank = msg.contents
  active = tank.amount / tank.capacity * 100 < 90
  print('setting output to ' .. tostring(not active))
  rs.setOutput('right', not active)
end)

Event.addHandler('heartbeat', function()
  Relay.send('getTankInfo', {
    name = 'Ethanol'
  })
end)

Event.heartbeat(30)