Added ADXL345 external component

components/adxl345/adxl345.h

@@ -0,0 +1,40 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/i2c/i2c.h"
+#include <Wire.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_ADXL345_U.h>
+
+namespace esphome {
+namespace adxl345 {
+
+class ADXL345Component : public PollingComponent, public i2c::I2CDevice {
+ public:
+  ADXL345Component() : PollingComponent(100) {}
+
+  void setup() override;
+  void update() override;
+  void dump_config() override;
+
+  void set_off_vertical_sensor(sensor::Sensor *off_vertical) { off_vertical_ = off_vertical; }
+  void set_jitter_sensor(sensor::Sensor *jitter) { jitter_ = jitter; }
+  void set_accel_x_sensor(sensor::Sensor *accel_x) { accel_x_ = accel_x; }
+  void set_accel_y_sensor(sensor::Sensor *accel_y) { accel_y_ = accel_y; }
+  void set_accel_z_sensor(sensor::Sensor *accel_z) { accel_z_ = accel_z; }
+  
+  void set_range(uint8_t range) { range_ = range; }
+
+ protected:
+  Adafruit_ADXL345_Unified accel_{12345};
+  sensor::Sensor *off_vertical_{nullptr};
+  sensor::Sensor *jitter_{nullptr};
+  sensor::Sensor *accel_x_{nullptr};
+  sensor::Sensor *accel_y_{nullptr};
+  sensor::Sensor *accel_z_{nullptr};
+  uint8_t range_{0}; // Default to 2G range (0)
+};
+
+} // namespace adxl345
+} // namespace esphome