Switch Scanner for EdgeTX Radio

local start_time
local debug_out = ""
local t_max = 500
local t_index = 0

local function init()
  start_time = getTime()/100
  debug_out = "\r\n\r\nInit'g swscanner.lua @ " .. start_time .. " seconds after startup \r\n\r\n"
  serialWrite(debug_out)
end

-- periodically called function
local function run()
    t_index = t_index + 1
    if t_index <= t_max then
        local fa = getSwitchName(t_index)
        if fa ~= nil then
            serialWrite(tostring(t_index) .. ": " .. fa .. "\r\n")
        end
    else
        serialWrite(".")
    end
end
return {run=run, init=init}