diff --git a/esphome/components/atc_mithermometer/atc_mithermometer.h b/esphome/components/atc_mithermometer/atc_mithermometer.h
index 07bdd40ae2..9b172a9c34 100644
--- a/esphome/components/atc_mithermometer/atc_mithermometer.h
+++ b/esphome/components/atc_mithermometer/atc_mithermometer.h
@@ -28,15 +28,15 @@ class ATCMiThermometer : public Component, public esp32_ble_tracker::ESPBTDevice
   void set_humidity(sensor::Sensor *humidity) { humidity_ = humidity; }
   void set_battery_level(sensor::Sensor *battery_level) { battery_level_ = battery_level; }
 
-  optional<ParseResult> parse_header(const esp32_ble_tracker::ServiceData &service_data);
-  bool parse_message(const std::vector<uint8_t> &message, ParseResult &result);
-  bool report_results(const optional<ParseResult> &result, const std::string &address);
-
  protected:
   uint64_t address_;
   sensor::Sensor *temperature_{nullptr};
   sensor::Sensor *humidity_{nullptr};
   sensor::Sensor *battery_level_{nullptr};
+  
+  optional<ParseResult> parse_header(const esp32_ble_tracker::ServiceData &service_data);
+  bool parse_message(const std::vector<uint8_t> &message, ParseResult &result);
+  bool report_results(const optional<ParseResult> &result, const std::string &address);
 };
 
 }  // namespace atc_mithermometer
diff --git a/esphome/components/atc_mithermometer/sensor.py b/esphome/components/atc_mithermometer/sensor.py
index c4f2dbb1c1..4b99e0087e 100644
--- a/esphome/components/atc_mithermometer/sensor.py
+++ b/esphome/components/atc_mithermometer/sensor.py
@@ -36,3 +36,5 @@ def to_code(config):
     if CONF_BATTERY_LEVEL in config:
         sens = yield sensor.new_sensor(config[CONF_BATTERY_LEVEL])
         cg.add(var.set_battery_level(sens))
+
+CODEOWNERS = ['@ahpohl']
\ No newline at end of file
diff --git a/esphome/components/xiaomi_lywsd03mmc/sensor.py b/esphome/components/xiaomi_lywsd03mmc/sensor.py
index 9ecf3f64a9..9271613480 100644
--- a/esphome/components/xiaomi_lywsd03mmc/sensor.py
+++ b/esphome/components/xiaomi_lywsd03mmc/sensor.py
@@ -40,3 +40,5 @@ def to_code(config):
     if CONF_BATTERY_LEVEL in config:
         sens = yield sensor.new_sensor(config[CONF_BATTERY_LEVEL])
         cg.add(var.set_battery_level(sens))
+
+CODEOWNERS = ['@ahpohl']
\ No newline at end of file