diff --git a/CODEOWNERS b/CODEOWNERS
index f50700c502b2..0cea8d48bafa 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -212,6 +212,7 @@ esphome/components/pid/* @OttoWinter
 esphome/components/pipsolar/* @andreashergert1984
 esphome/components/pm1006/* @habbie
 esphome/components/pmsa003i/* @sjtrny
+esphome/components/pmwcs3/* @SeByDocKy
 esphome/components/pn532/* @OttoWinter @jesserockz
 esphome/components/pn532_i2c/* @OttoWinter @jesserockz
 esphome/components/pn532_spi/* @OttoWinter @jesserockz
diff --git a/esphome/components/pmwcs3/__init__.py b/esphome/components/pmwcs3/__init__.py
new file mode 100644
index 000000000000..b04c30a00530
--- /dev/null
+++ b/esphome/components/pmwcs3/__init__.py
@@ -0,0 +1 @@
+CODEOWNERS = ["@SeByDocKy"]
diff --git a/esphome/components/pmwcs3/pmwcs3.cpp b/esphome/components/pmwcs3/pmwcs3.cpp
new file mode 100644
index 000000000000..812018b52e44
--- /dev/null
+++ b/esphome/components/pmwcs3/pmwcs3.cpp
@@ -0,0 +1,115 @@
+#include "pmwcs3.h"
+#include "esphome/core/hal.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace pmwcs3 {
+
+static const uint8_t PMWCS3_I2C_ADDRESS = 0x63;
+static const uint8_t PMWCS3_REG_READ_START = 0x01;
+static const uint8_t PMWCS3_REG_READ_E25 = 0x02;
+static const uint8_t PMWCS3_REG_READ_EC = 0x03;
+static const uint8_t PMWCS3_REG_READ_TEMP = 0x04;
+static const uint8_t PMWCS3_REG_READ_VWC = 0x05;
+static const uint8_t PMWCS3_REG_CALIBRATE_AIR = 0x06;
+static const uint8_t PMWCS3_REG_CALIBRATE_WATER = 0x07;
+static const uint8_t PMWCS3_SET_I2C_ADDRESS = 0x08;
+static const uint8_t PMWCS3_REG_GET_DATA = 0x09;
+static const uint8_t PMWCS3_REG_CALIBRATE_EC = 0x10;
+static const uint8_t PMWCS3_REG_CAP = 0x0A;
+static const uint8_t PMWCS3_REG_RES = 0x0B;
+static const uint8_t PMWCS3_REG_RC = 0x0C;
+static const uint8_t PMWCS3_REG_RT = 0x0D;
+
+static const char *const TAG = "pmwcs3";
+
+void PMWCS3Component::new_i2c_address(uint8_t address) {
+  if (!this->write_byte(PMWCS3_SET_I2C_ADDRESS, address)) {
+    this->status_set_warning();
+    ESP_LOGW(TAG, "couldn't write the new I2C address %d", address);
+    return;
+  }
+  this->set_i2c_address(address);  // Allows device to continue working until new firmware is written with new address.
+  ESP_LOGVV(TAG, "changed I2C address to %d", address);
+  this->status_clear_warning();
+}
+
+void PMWCS3Component::air_calibration() {
+  if (!this->write_bytes(PMWCS3_REG_CALIBRATE_AIR, nullptr, 0)) {
+    this->status_set_warning();
+    ESP_LOGW(TAG, "couldn't start air calibration");
+    return;
+  }
+  ESP_LOGW(TAG, "Start air calibration during the next 300s");
+}
+void PMWCS3Component::water_calibration() {
+  if (!this->write_bytes(PMWCS3_REG_CALIBRATE_WATER, nullptr, 0)) {
+    this->status_set_warning();
+    ESP_LOGW(TAG, "couldn't start water calibration");
+    return;
+  }
+  ESP_LOGW(TAG, "Start water calibration during the next 300s");
+}
+
+void PMWCS3Component::setup() { ESP_LOGCONFIG(TAG, "Setting up PMWCS3..."); }
+
+void PMWCS3Component::update() { this->read_data_(); }
+
+float PMWCS3Component::get_setup_priority() const { return setup_priority::DATA; }
+
+void PMWCS3Component::dump_config() {
+  ESP_LOGCONFIG(TAG, "PMWCS3");
+  LOG_I2C_DEVICE(this);
+  if (this->is_failed()) {
+    ESP_LOGE(TAG, "Communication with PMWCS3 failed!");
+  }
+  ESP_LOGI(TAG, "%s", this->is_failed() ? "FAILED" : "OK");
+
+  LOG_UPDATE_INTERVAL(this);
+  LOG_SENSOR("  ", "e25", this->e25_sensor_);
+  LOG_SENSOR("  ", "ec", this->ec_sensor_);
+  LOG_SENSOR("  ", "temperature", this->temperature_sensor_);
+  LOG_SENSOR("  ", "vwc", this->vwc_sensor_);
+}
+void PMWCS3Component::read_data_() {
+  uint8_t data[8];
+  float e25, ec, temperature, vwc;
+
+  /////// Super important !!!! first activate reading PMWCS3_REG_READ_START (if not, return always the same values) ////
+
+  if (!this->write_bytes(PMWCS3_REG_READ_START, nullptr, 0)) {
+    this->status_set_warning();
+    ESP_LOGVV(TAG, "Failed to write into REG_READ_START register !!!");
+    return;
+  }
+  // NOLINT  delay(100);
+
+  if (!this->read_bytes(PMWCS3_REG_GET_DATA, (uint8_t *) &data, 8)) {
+    ESP_LOGVV(TAG, "Error reading PMWCS3_REG_GET_DATA registers");
+    this->mark_failed();
+    return;
+  }
+  if (this->e25_sensor_ != nullptr) {
+    e25 = ((data[1] << 8) | data[0]) / 100.0;
+    this->e25_sensor_->publish_state(e25);
+    ESP_LOGVV(TAG, "e25: data[0]=%d, data[1]=%d, result=%f", data[0], data[1], e25);
+  }
+  if (this->ec_sensor_ != nullptr) {
+    ec = ((data[3] << 8) | data[2]) / 10.0;
+    this->ec_sensor_->publish_state(ec);
+    ESP_LOGVV(TAG, "ec: data[2]=%d, data[3]=%d, result=%f", data[2], data[3], ec);
+  }
+  if (this->temperature_sensor_ != nullptr) {
+    temperature = ((data[5] << 8) | data[4]) / 100.0;
+    this->temperature_sensor_->publish_state(temperature);
+    ESP_LOGVV(TAG, "temp: data[4]=%d, data[5]=%d, result=%f", data[4], data[5], temperature);
+  }
+  if (this->vwc_sensor_ != nullptr) {
+    vwc = ((data[7] << 8) | data[6]) / 10.0;
+    this->vwc_sensor_->publish_state(vwc);
+    ESP_LOGVV(TAG, "vwc: data[6]=%d, data[7]=%d, result=%f", data[6], data[7], vwc);
+  }
+}
+
+}  // namespace pmwcs3
+}  // namespace esphome
diff --git a/esphome/components/pmwcs3/pmwcs3.h b/esphome/components/pmwcs3/pmwcs3.h
new file mode 100644
index 000000000000..f3916bb8683d
--- /dev/null
+++ b/esphome/components/pmwcs3/pmwcs3.h
@@ -0,0 +1,70 @@
+#pragma once
+#include "esphome/core/automation.h"
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/i2c/i2c.h"
+
+// ref:
+// https://github.com/tinovi/i2cArduino/blob/master/i2cArduino.h
+
+namespace esphome {
+namespace pmwcs3 {
+
+class PMWCS3Component : public PollingComponent, public i2c::I2CDevice {
+ public:
+  void setup() override;
+  void update() override;
+  void dump_config() override;
+  float get_setup_priority() const override;
+
+  void set_e25_sensor(sensor::Sensor *e25_sensor) { e25_sensor_ = e25_sensor; }
+  void set_ec_sensor(sensor::Sensor *ec_sensor) { ec_sensor_ = ec_sensor; }
+  void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
+  void set_vwc_sensor(sensor::Sensor *vwc_sensor) { vwc_sensor_ = vwc_sensor; }
+
+  void new_i2c_address(uint8_t newaddress);
+  void air_calibration();
+  void water_calibration();
+
+ protected:
+  void read_data_();
+
+  sensor::Sensor *e25_sensor_{nullptr};
+  sensor::Sensor *ec_sensor_{nullptr};
+  sensor::Sensor *temperature_sensor_{nullptr};
+  sensor::Sensor *vwc_sensor_{nullptr};
+};
+
+template<typename... Ts> class PMWCS3AirCalibrationAction : public Action<Ts...> {
+ public:
+  PMWCS3AirCalibrationAction(PMWCS3Component *parent) : parent_(parent) {}
+
+  void play(Ts... x) override { this->parent_->air_calibration(); }
+
+ protected:
+  PMWCS3Component *parent_;
+};
+
+template<typename... Ts> class PMWCS3WaterCalibrationAction : public Action<Ts...> {
+ public:
+  PMWCS3WaterCalibrationAction(PMWCS3Component *parent) : parent_(parent) {}
+
+  void play(Ts... x) override { this->parent_->water_calibration(); }
+
+ protected:
+  PMWCS3Component *parent_;
+};
+
+template<typename... Ts> class PMWCS3NewI2cAddressAction : public Action<Ts...> {
+ public:
+  PMWCS3NewI2cAddressAction(PMWCS3Component *parent) : parent_(parent) {}
+  TEMPLATABLE_VALUE(int, new_address)
+
+  void play(Ts... x) override { this->parent_->new_i2c_address(this->new_address_.value(x...)); }
+
+ protected:
+  PMWCS3Component *parent_;
+};
+
+}  // namespace pmwcs3
+}  // namespace esphome
diff --git a/esphome/components/pmwcs3/sensor.py b/esphome/components/pmwcs3/sensor.py
new file mode 100644
index 000000000000..81be327d14b4
--- /dev/null
+++ b/esphome/components/pmwcs3/sensor.py
@@ -0,0 +1,140 @@
+import esphome.codegen as cg
+from esphome import automation
+import esphome.config_validation as cv
+from esphome.components import i2c, sensor
+from esphome.const import (
+    CONF_ID,
+    CONF_ADDRESS,
+    CONF_TEMPERATURE,
+    CONF_EC,
+    STATE_CLASS_MEASUREMENT,
+    ICON_THERMOMETER,
+)
+
+CODEOWNERS = ["@SeByDocKy"]
+DEPENDENCIES = ["i2c"]
+
+CONF_E25 = "e25"
+CONF_VWC = "vwc"
+
+ICON_EPSILON = "mdi:epsilon"
+ICON_SIGMA = "mdi:sigma-lower"
+ICON_ALPHA = "mdi:alpha-h-circle-outline"
+
+pmwcs3_ns = cg.esphome_ns.namespace("pmwcs3")
+PMWCS3Component = pmwcs3_ns.class_(
+    "PMWCS3Component", cg.PollingComponent, i2c.I2CDevice
+)
+
+# Actions
+PMWCS3AirCalibrationAction = pmwcs3_ns.class_(
+    "PMWCS3AirCalibrationAction", automation.Action
+)
+PMWCS3WaterCalibrationAction = pmwcs3_ns.class_(
+    "PMWCS3WaterCalibrationAction", automation.Action
+)
+PMWCS3NewI2cAddressAction = pmwcs3_ns.class_(
+    "PMWCS3NewI2cAddressAction", automation.Action
+)
+
+CONFIG_SCHEMA = (
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(PMWCS3Component),
+            cv.Optional(CONF_E25): sensor.sensor_schema(
+                icon=ICON_EPSILON,
+                accuracy_decimals=3,
+                unit_of_measurement="dS/m",
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+            cv.Optional(CONF_EC): sensor.sensor_schema(
+                icon=ICON_SIGMA,
+                accuracy_decimals=2,
+                unit_of_measurement="mS/m",
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+            cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(
+                icon=ICON_THERMOMETER,
+                accuracy_decimals=3,
+                unit_of_measurement="°C",
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+            cv.Optional(CONF_VWC): sensor.sensor_schema(
+                icon=ICON_ALPHA,
+                accuracy_decimals=3,
+                unit_of_measurement="cm3cm−3",
+                state_class=STATE_CLASS_MEASUREMENT,
+            ),
+        }
+    )
+    .extend(cv.polling_component_schema("60s"))
+    .extend(i2c.i2c_device_schema(0x63))
+)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+    await i2c.register_i2c_device(var, config)
+
+    if CONF_E25 in config:
+        sens = await sensor.new_sensor(config[CONF_E25])
+        cg.add(var.set_e25_sensor(sens))
+
+    if CONF_EC in config:
+        sens = await sensor.new_sensor(config[CONF_EC])
+        cg.add(var.set_ec_sensor(sens))
+
+    if CONF_TEMPERATURE in config:
+        sens = await sensor.new_sensor(config[CONF_TEMPERATURE])
+        cg.add(var.set_temperature_sensor(sens))
+
+    if CONF_VWC in config:
+        sens = await sensor.new_sensor(config[CONF_VWC])
+        cg.add(var.set_vwc_sensor(sens))
+
+
+# Actions
+PMWCS3_CALIBRATION_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(): cv.use_id(PMWCS3Component),
+    }
+)
+
+
+@automation.register_action(
+    "pmwcs3.air_calibration",
+    PMWCS3AirCalibrationAction,
+    PMWCS3_CALIBRATION_SCHEMA,
+)
+@automation.register_action(
+    "pmwcs3.water_calibration",
+    PMWCS3WaterCalibrationAction,
+    PMWCS3_CALIBRATION_SCHEMA,
+)
+async def pmwcs3_calibration_to_code(config, action_id, template_arg, args):
+    parent = await cg.get_variable(config[CONF_ID])
+    var = cg.new_Pvariable(action_id, template_arg, parent)
+    return var
+
+
+PMWCS3_NEW_I2C_ADDRESS_SCHEMA = cv.maybe_simple_value(
+    {
+        cv.GenerateID(): cv.use_id(PMWCS3Component),
+        cv.Required(CONF_ADDRESS): cv.templatable(cv.i2c_address),
+    },
+    key=CONF_ADDRESS,
+)
+
+
+@automation.register_action(
+    "pmwcs3.new_i2c_address",
+    PMWCS3NewI2cAddressAction,
+    PMWCS3_NEW_I2C_ADDRESS_SCHEMA,
+)
+async def pmwcs3newi2caddress_to_code(config, action_id, template_arg, args):
+    parent = await cg.get_variable(config[CONF_ID])
+    var = cg.new_Pvariable(action_id, template_arg, parent)
+    address = await cg.templatable(config[CONF_ADDRESS], args, int)
+    cg.add(var.set_new_address(address))
+    return var
diff --git a/tests/test1.yaml b/tests/test1.yaml
index 66caad961af3..80cd9e3987fa 100644
--- a/tests/test1.yaml
+++ b/tests/test1.yaml
@@ -348,6 +348,16 @@ mcp23s17:
     deviceaddress: 1
 
 sensor:
+  - platform: pmwcs3
+    i2c_id: i2c_bus
+    e25:
+      name: pmwcs3_e25
+    ec:
+      name: pmwcs3_ec
+    temperature:
+      name: pmwcs3_temperature
+    vwc:
+      name: pmwcs3_vwc
   - platform: gcja5
     pm_1_0:
       name: "Particulate Matter <1.0µm Concentration"