-- reactor_sender.lua
-- Attach modem to "back" (or change side)
-- Attach adapter to reactor (e.g. "left")

local modemSide = "right"
local reactorSide = "back"
local channel = "reactorFuel"

local reactor = peripheral.wrap(reactorSide)
if not reactor then
  error("No reactor peripheral found on " .. reactorSide)
end

rednet.open(modemSide)

local function getFuelLevel()
  local inv = reactor.list()
  local total = 0
  local max = 7 * 4 -- 7 quad cells = 28 units

  for _, item in pairs(inv) do
    if item.name:find("uranium_fuel_rod") and not item.name:find("depleted") then
      if item.name:find("quad") then
        total = total + 4
      elseif item.name:find("dual") then
        total = total + 2
      else
        total = total + 1
      end
    end
  end

  return total / max
end

while true do
  local fuel = getFuelLevel()
  rednet.broadcast(fuel, channel)
  sleep(5) -- adjust update interval
end