add missing set_frequency action

esphome/components/kt0803/__init__.py

@@ -26,7 +26,7 @@ UNIT_MEGA_HERTZ = "MHz"
 UNIT_KILO_HERTZ = "kHz"
 UNIT_MILLI_VOLT = "mV"
 UNIT_MICRO_AMPERE = "mA"
-UNIT_DECIBEL_MICRO_VOLT = "dBµV"
+UNIT_DECIBEL_MICRO_VOLT = "dBuV"
 
 ICON_VOLUME_MUTE = "mdi:volume-mute"
 ICON_EAR_HEARING = "mdi:ear-hearing"
@@ -361,6 +361,24 @@ CONFIG_SCHEMA = (
 )
 
 
+FREQUENCY_SCHEMA = automation.maybe_simple_id(
+    {
+        cv.GenerateID(): cv.use_id(KT0803Component),
+        cv.Required(CONF_FREQUENCY): cv.float_range(min = 70, max = 108),
+    }
+)
+
+
+@automation.register_action("kt0803.set_frequency", SetFrequencyAction, FREQUENCY_SCHEMA)
+async def tune_frequency_action_to_code(config, action_id, template_arg, args):
+    var = cg.new_Pvariable(action_id, template_arg)
+    await cg.register_parented(var, config[CONF_ID])
+    if frequency := config.get(CONF_FREQUENCY):
+        template_ = await cg.templatable(frequency, args, cg.float_)
+        cg.add(var.set_frequency(template_))
+    return var
+
+    
 async def set_var(config, id, setter):
     if c := config.get(id):
         cg.add(setter(c))

esphome/components/kt0803/kt0803.h

@@ -198,5 +198,12 @@ class KT0803Component : public PollingComponent, public i2c::I2CDevice {
   AlcLow get_alc_low();
 };
 
+template<typename... Ts> class SetFrequencyAction : public Action<Ts...>, public Parented<KT0803Component> {
+  TEMPLATABLE_VALUE(float, frequency)
+  void play(Ts... x) override {
+    this->parent_->set_frequency(this->frequency_.value(x...));
+  }
+};
+
 }  // namespace kt0803
 }  // namespace esphome

esphome/components/kt0803/kt0803defs.h

@@ -22,6 +22,7 @@ enum class ChipId {
   KT0803K,
   KT0803M,
   KT0803L,
+  LAST,
 };
 
 enum class PreEmphasis {