diff --git a/CODEOWNERS b/CODEOWNERS
index ef2af83fa7..aad7cc3a19 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -18,6 +18,7 @@ esphome/components/animation/* @syndlex
 esphome/components/api/* @OttoWinter
 esphome/components/async_tcp/* @OttoWinter
 esphome/components/atc_mithermometer/* @ahpohl
+esphome/components/b_parasite/* @rbaron
 esphome/components/bang_bang/* @OttoWinter
 esphome/components/binary_sensor/* @esphome/core
 esphome/components/bme680_bsec/* @trvrnrth
diff --git a/esphome/components/b_parasite/__init__.py b/esphome/components/b_parasite/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/esphome/components/b_parasite/b_parasite.cpp b/esphome/components/b_parasite/b_parasite.cpp
new file mode 100644
index 0000000000..828e392993
--- /dev/null
+++ b/esphome/components/b_parasite/b_parasite.cpp
@@ -0,0 +1,82 @@
+#include "b_parasite.h"
+#include "esphome/core/log.h"
+
+#ifdef ARDUINO_ARCH_ESP32
+
+namespace esphome {
+namespace b_parasite {
+
+static const char* TAG = "b_parasite";
+
+void BParasite::dump_config() {
+  ESP_LOGCONFIG(TAG, "b_parasite");
+  LOG_SENSOR("  ", "Battery Voltage", this->battery_voltage_);
+  LOG_SENSOR("  ", "Temperature", this->temperature_);
+  LOG_SENSOR("  ", "Humidity", this->humidity_);
+  LOG_SENSOR("  ", "Soil Moisture", this->soil_moisture_);
+}
+
+bool BParasite::parse_device(const esp32_ble_tracker::ESPBTDevice& device) {
+  if (device.address_uint64() != address_) {
+    ESP_LOGVV(TAG, "parse_device(): unknown MAC address.");
+    return false;
+  }
+  ESP_LOGVV(TAG, "parse_device(): MAC address %s found.", device.address_str().c_str());
+  const auto& service_datas = device.get_service_datas();
+  if (service_datas.size() != 1) {
+    ESP_LOGE(TAG, "Unexpected service_datas size (%d)", service_datas.size());
+    return false;
+  }
+  const auto& service_data = service_datas[0];
+
+  ESP_LOGVV(TAG, "Service data:");
+  for (const uint8_t byte : service_data.data) {
+    ESP_LOGVV(TAG, "0x%02x", byte);
+  }
+
+  const auto& data = service_data.data;
+
+  // Counter for deduplicating messages.
+  uint8_t counter = data[1] & 0x0f;
+  if (last_processed_counter_ == counter) {
+    ESP_LOGVV(TAG, "Skipping already processed counter (%u)", counter);
+    return false;
+  }
+
+  // Battery voltage in millivolts.
+  uint16_t battery_millivolt = data[2] << 8 | data[3];
+  float battery_voltage = battery_millivolt / 1000.0f;
+
+  // Temperature in 1000 * Celcius.
+  uint16_t temp_millicelcius = data[4] << 8 | data[5];
+  float temp_celcius = temp_millicelcius / 1000.0f;
+
+  // Relative air humidity in the range [0, 2^16).
+  uint16_t humidity = data[6] << 8 | data[7];
+  float humidity_percent = (100.0f * humidity) / (1 << 16);
+
+  // Relative soil moisture in [0 - 2^16).
+  uint16_t soil_moisture = data[8] << 8 | data[9];
+  float moisture_percent = (100.0f * soil_moisture) / (1 << 16);
+
+  if (battery_voltage_ != nullptr) {
+    battery_voltage_->publish_state(battery_voltage);
+  }
+  if (temperature_ != nullptr) {
+    temperature_->publish_state(temp_celcius);
+  }
+  if (humidity_ != nullptr) {
+    humidity_->publish_state(humidity_percent);
+  }
+  if (soil_moisture_ != nullptr) {
+    soil_moisture_->publish_state(moisture_percent);
+  }
+
+  last_processed_counter_ = counter;
+  return true;
+}
+
+}  // namespace b_parasite
+}  // namespace esphome
+
+#endif  // ARDUINO_ARCH_ESP32
diff --git a/esphome/components/b_parasite/b_parasite.h b/esphome/components/b_parasite/b_parasite.h
new file mode 100644
index 0000000000..04f648ab63
--- /dev/null
+++ b/esphome/components/b_parasite/b_parasite.h
@@ -0,0 +1,40 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/esp32_ble_tracker/esp32_ble_tracker.h"
+
+#ifdef ARDUINO_ARCH_ESP32
+
+namespace esphome {
+namespace b_parasite {
+
+class BParasite : public Component, public esp32_ble_tracker::ESPBTDeviceListener {
+ public:
+  void set_address(uint64_t address) { address_ = address; };
+  void set_bindkey(const std::string &bindkey);
+
+  bool parse_device(const esp32_ble_tracker::ESPBTDevice &device) override;
+  void dump_config() override;
+  float get_setup_priority() const override { return setup_priority::DATA; }
+
+  void set_battery_voltage(sensor::Sensor *battery_voltage) { battery_voltage_ = battery_voltage; }
+  void set_temperature(sensor::Sensor *temperature) { temperature_ = temperature; }
+  void set_humidity(sensor::Sensor *humidity) { humidity_ = humidity; }
+  void set_soil_moisture(sensor::Sensor *soil_moisture) { soil_moisture_ = soil_moisture; }
+
+ protected:
+  // The received advertisement packet contains an unsigned 4 bits wrap-around counter
+  // for deduplicating messages.
+  int8_t last_processed_counter_ = -1;
+  uint64_t address_;
+  sensor::Sensor *battery_voltage_{nullptr};
+  sensor::Sensor *temperature_{nullptr};
+  sensor::Sensor *humidity_{nullptr};
+  sensor::Sensor *soil_moisture_{nullptr};
+};
+
+}  // namespace b_parasite
+}  // namespace esphome
+
+#endif  // ARDUINO_ARCH_ESP32
diff --git a/esphome/components/b_parasite/sensor.py b/esphome/components/b_parasite/sensor.py
new file mode 100644
index 0000000000..d90ea84cd3
--- /dev/null
+++ b/esphome/components/b_parasite/sensor.py
@@ -0,0 +1,68 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import sensor, esp32_ble_tracker
+from esphome.const import (
+    CONF_BATTERY_VOLTAGE,
+    CONF_HUMIDITY,
+    CONF_ID,
+    CONF_MOISTURE,
+    CONF_MAC_ADDRESS,
+    CONF_TEMPERATURE,
+    DEVICE_CLASS_HUMIDITY,
+    DEVICE_CLASS_TEMPERATURE,
+    DEVICE_CLASS_VOLTAGE,
+    ICON_EMPTY,
+    UNIT_CELSIUS,
+    UNIT_PERCENT,
+    UNIT_VOLT,
+)
+
+CODEOWNERS = ["@rbaron"]
+
+DEPENDENCIES = ["esp32_ble_tracker"]
+
+b_parasite_ns = cg.esphome_ns.namespace("b_parasite")
+BParasite = b_parasite_ns.class_(
+    "BParasite", esp32_ble_tracker.ESPBTDeviceListener, cg.Component
+)
+
+CONFIG_SCHEMA = (
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(BParasite),
+            cv.Required(CONF_MAC_ADDRESS): cv.mac_address,
+            cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(
+                UNIT_CELSIUS, ICON_EMPTY, 1, DEVICE_CLASS_TEMPERATURE
+            ),
+            cv.Optional(CONF_HUMIDITY): sensor.sensor_schema(
+                UNIT_PERCENT, ICON_EMPTY, 1, DEVICE_CLASS_HUMIDITY
+            ),
+            cv.Optional(CONF_BATTERY_VOLTAGE): sensor.sensor_schema(
+                UNIT_VOLT, ICON_EMPTY, 3, DEVICE_CLASS_VOLTAGE
+            ),
+            cv.Optional(CONF_MOISTURE): sensor.sensor_schema(
+                UNIT_PERCENT, ICON_EMPTY, 1, DEVICE_CLASS_HUMIDITY
+            ),
+        }
+    )
+    .extend(esp32_ble_tracker.ESP_BLE_DEVICE_SCHEMA)
+    .extend(cv.COMPONENT_SCHEMA)
+)
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield cg.register_component(var, config)
+    yield esp32_ble_tracker.register_ble_device(var, config)
+
+    cg.add(var.set_address(config[CONF_MAC_ADDRESS].as_hex))
+
+    for (config_key, setter) in [
+        (CONF_TEMPERATURE, var.set_temperature),
+        (CONF_HUMIDITY, var.set_humidity),
+        (CONF_BATTERY_VOLTAGE, var.set_battery_voltage),
+        (CONF_MOISTURE, var.set_soil_moisture),
+    ]:
+        if config_key in config:
+            sens = yield sensor.new_sensor(config[config_key])
+            cg.add(setter(sens))
diff --git a/tests/test2.yaml b/tests/test2.yaml
index 616fe32139..04514cbef2 100644
--- a/tests/test2.yaml
+++ b/tests/test2.yaml
@@ -70,6 +70,16 @@ sensor:
   - platform: ble_rssi
     service_uuid: '11223344-5566-7788-99aa-bbccddeeff00'
     name: 'BLE Test Service 128'
+  - platform: b_parasite
+    mac_address: F0:CA:F0:CA:01:01
+    humidity:
+      name: 'b-parasite Air Humidity'
+    temperature:
+      name: 'b-parasite Air Temperature'
+    moisture:
+      name: 'b-parasite Soil Moisture'
+    battery_voltage:
+      name: 'b-parasite Battery Voltage'
   - platform: senseair
     id: senseair0
     co2: