diff --git a/lib/logitech_receiver/settings.py b/lib/logitech_receiver/settings.py
index 904718f16..9fe57cc26 100644
--- a/lib/logitech_receiver/settings.py
+++ b/lib/logitech_receiver/settings.py
@@ -634,7 +634,10 @@ def __init__(
 
     def read(self, device, data_bytes=b""):
         assert self.feature is not None
-        return device.feature_request(self.feature, self.read_fnid, self.prefix, self.read_prefix, data_bytes)
+        if self.read_fnid is not None:
+            return device.feature_request(self.feature, self.read_fnid, self.prefix, self.read_prefix, data_bytes)
+        else:
+            return b""
 
     def write(self, device, data_bytes):
         assert self.feature is not None
diff --git a/lib/logitech_receiver/settings_templates.py b/lib/logitech_receiver/settings_templates.py
index b9c06adef..d796e271f 100644
--- a/lib/logitech_receiver/settings_templates.py
+++ b/lib/logitech_receiver/settings_templates.py
@@ -1621,7 +1621,7 @@ def setup(cls, device, read_fnid, write_fnid, suffix):
             prefix = common.int2bytes(zone.index, 1)
             rw = settings.FeatureRW(cls.feature, read_fnid, write_fnid, prefix=prefix, suffix=suffix)
             validator = settings_validator.HeteroValidator(
-                data_class=hidpp20.LEDEffectSetting, options=zone.effects, readable=infos.readable
+                data_class=hidpp20.LEDEffectSetting, options=zone.effects, readable=infos.readable and read_fnid is not None
             )
             setting = cls(device, rw, validator)
             setting.name = cls.name + str(int(zone.location))
@@ -1657,7 +1657,7 @@ class RGBEffectSetting(LEDZoneSetting):
 
     @classmethod
     def build(cls, device):
-        return cls.setup(device, 0xE0, 0x10, b"\x01")
+        return cls.setup(device, None, 0x10, b"\x01")
 
 
 class PerKeyLighting(settings.Settings):