....................

components/custom_monochromatic/monochromatic_light_output.h

@@ -9,6 +9,9 @@
 namespace esphome {
 namespace c_monochromatic {
 
+
+static const char *TAG = "empty_i2c_sensor.sensor";
+
 enum State { Off, Auto, On };
 
 class MonochromaticLightOutput : public light::LightOutput,