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Fibaro HC3 - Change Device parameter



I Would like to change a device parameter of a Fibaro Dimmer 2 module.

Specifically Parameter 19 (Force Dimming Level) .


This worked perfectly in HC2 with the following code:


function modifyParameter(deviceID,parameterID,parameterValue,productInfo)
  local ok, result, parameter
  device=api.get("/devices/" .. deviceID)
  if device.properties.productInfo ~= productInfo then
        "Device %d property prodInfo %s differs from %s.\nNothing written to device.",
  for _,v in pairs(device.properties.parameters) do
    if v.id==parameterID then
  if not parameter then
        "Device %d does not seem to have parameter %d.\nNothing written to device.",
  local settings = {
  ok, result=pcall(api.put,"/devices/" .. device.id,settings)
  if not ok then
    fibaro:debug("api call failed: "..result)
-- Uncomment one of the lines below.
-- Change first argument = your device ID 
-- 3-click the button on the device to set the parameter.
-- Check status window: "Received parameter 1 report, value ="
-- Less sensitivity on FGMS-001 v2
-- Less sensitivity on FGMS-001 v2
But in HC3 I can see it is changing the value of Parameter 19 but when I turn on the device it goes to my value setting for half a second and it bumps up the lights to 40% immediately.
No matter what value I set on Parameter 19, the value get's changed by the above code as I can confirm this after running it and checking the device but it only works for half a second and it always bumps up the lights to exactly 40%.
None of the other parameters on the device have a value of 40 so I can't tell why it is doing this.
Anyone have a suggestion ?
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  • Inquirer
  • Posted (edited)

    Aparantly it can be done on some devices with the following. Code:



    So in my case:



    101 is ny device-id, 19 is the parameter to adjust, 1 is the byte length and the new value is 30.


    However, this is not possible on Dimmer 2 devices. 

    To get your device details like byte-length and possible parameters and values:


    Edited by GeeMoney
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