SHAC - Edlt heating control

Hi I have created a script to enable me to set the room temp on a edlt and change the set point, (due to a update you need to keep the labels length below 14 characters). Im look to duplicate the set up onto the shac to allow the user to edit the same "set point" - I can get the local temp and the status but cannot get the button to move the set point up and down to work? Also any pointers on how to display the "set point- target temp?


--get room temp from sensor--
temp, units = GetCBusMeasurement(0, 253, 1)
--round the value
temp1 = tonumber(string.format("%." .. (1) .. "f", temp))
--convert to a string
temp2 = tostring(temp1)
--format the appearance of the label
label = ('Room Temp ' ..temp2..' '..units)
--if temp is different the update dynamic label
if (old_temp ~= temp1) then
SetCBusUnicodeLabel(0, 56, 8, 'English', 'Variant2', label)
old_temp = temp1
else
end

--read in setpoint and convert to a string
set_temp = storage.get('setpoint')
set_temp1 = tostring(set_temp)
--format the appearance of the label
set_label = ('SetPoint ' ..set_temp1..' '..units)
--if temp is different the update dynamic label
if (old_set_temp ~= set_temp1) then
SetCBusUnicodeLabel(0, 56, 8, 'English', 'Variant1', set_label)
old_set_temp = set_temp1
else
end

-- compare values and turn the load on or off
if set_temp > temp1 then
SetCBusLevel(0, 56, 10, 255, 4)
elseif set_temp <= temp1 then
SetCBusLevel(0, 56, 10, 0, 0)
end