--Function to read value from analog register
function ReadRegister(device, analogPin)
    local inst = mc.mcGetInstance()
    local hreg = mc.mcRegGetHandle(inst, string.format("%s/Analog input %s", device, analogPin))
    return mc.mcRegGetValueString(hreg)
end

--Function to set FRO value
function SetFRO(analog)
    local percent = analog/1*250 --calculate percentage from 0% to 250%
    local inst = mc.mcGetInstance()
    mc.mcCntlSetFRO(inst, percent)
end

--Main
local device = "PoKeys" --Change this to the name of your PoKeys device
local analogPin = "45" --Analog input pin number

analogVal = ReadRegister(device, analogPin) --Save analog register value in variable
SetFRO(analogVal) -- Set FRO value in %