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https://github.com/jdillenburg/esphome.git
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7dc846a6eb
I modified the component to remove all Adafruit library dependencies and instead use a lightweight, self-contained ESPHome driver for ADXL345. After these changes, multiple ADXL345 sensors can be used in combination with a TCA9548A I²C multiplexer without conflicts.
102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
##include "adxl345.h"
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#include "esphome/core/log.h"
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#include <cmath>
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namespace esphome {
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namespace adxl345 {
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static const char *const TAG = "adxl345";
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// Register map
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static const uint8_t REG_DEVID = 0x00;
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static const uint8_t REG_POWER_CTL = 0x2D;
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static const uint8_t REG_DATA_FORMAT = 0x31;
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static const uint8_t REG_DATAX0 = 0x32;
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void ADXL345Component::setup() {
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ESP_LOGCONFIG(TAG, "Setting up ADXL345...");
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// Check device ID
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uint8_t devid;
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if (this->read_register(REG_DEVID, &devid, 1) != i2c::ERROR_OK || devid != 0xE5) {
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ESP_LOGE(TAG, "ADXL345 not found at 0x%02X (id=0x%02X)", this->address_, devid);
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this->mark_failed();
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return;
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}
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ESP_LOGI(TAG, "Found ADXL345 at 0x%02X", this->address_);
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// Set range
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uint8_t range_bits = 0;
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switch (this->range_) {
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case 0: range_bits = 0x00; break; // ±2g
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case 1: range_bits = 0x01; break; // ±4g
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case 2: range_bits = 0x02; break; // ±8g
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case 3: range_bits = 0x03; break; // ±16g
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}
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this->write_register(REG_DATA_FORMAT, &range_bits, 1);
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// Enable measurement mode
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uint8_t power = 0x08;
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this->write_register(REG_POWER_CTL, &power, 1);
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ESP_LOGD(TAG, "ADXL345 setup complete");
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}
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void ADXL345Component::dump_config() {
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ESP_LOGCONFIG(TAG, "ADXL345:");
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LOG_I2C_DEVICE(this);
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LOG_UPDATE_INTERVAL(this);
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const char* range_str;
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switch (this->range_) {
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case 0: range_str = "2G"; break;
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case 1: range_str = "4G"; break;
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case 2: range_str = "8G"; break;
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case 3: range_str = "16G"; break;
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default: range_str = "Unknown"; break;
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}
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ESP_LOGCONFIG(TAG, " Range: %s", range_str);
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if (this->off_vertical_ != nullptr) LOG_SENSOR(" ", "Off Vertical", this->off_vertical_);
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if (this->jitter_ != nullptr) LOG_SENSOR(" ", "Jitter", this->jitter_);
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if (this->accel_x_ != nullptr) LOG_SENSOR(" ", "Acceleration X", this->accel_x_);
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if (this->accel_y_ != nullptr) LOG_SENSOR(" ", "Acceleration Y", this->accel_y_);
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if (this->accel_z_ != nullptr) LOG_SENSOR(" ", "Acceleration Z", this->accel_z_);
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}
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void ADXL345Component::update() {
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uint8_t buffer[6];
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if (this->read_register(REG_DATAX0, buffer, 6) != i2c::ERROR_OK) {
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ESP_LOGW(TAG, "Failed to read data");
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return;
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}
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int16_t raw_x = (int16_t)(buffer[1] << 8 | buffer[0]);
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int16_t raw_y = (int16_t)(buffer[3] << 8 | buffer[2]);
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int16_t raw_z = (int16_t)(buffer[5] << 8 | buffer[4]);
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// Scale: 4 mg/LSB in full-res mode (0.004 g), convert to m/s²
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float scale = 0.004f * 9.80665f;
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float x = raw_x * scale;
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float y = raw_y * scale;
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float z = raw_z * scale;
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if (this->accel_x_ != nullptr) this->accel_x_->publish_state(x);
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if (this->accel_y_ != nullptr) this->accel_y_->publish_state(y);
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if (this->accel_z_ != nullptr) this->accel_z_->publish_state(z);
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if (this->off_vertical_ != nullptr) {
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double pitch = atan(y / sqrt(pow(x, 2) + pow(z, 2))) * 180.0 / M_PI;
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double roll = atan(-x / sqrt(pow(y, 2) + pow(z, 2))) * 180.0 / M_PI;
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this->off_vertical_->publish_state(std::max(std::abs(pitch), std::abs(roll)));
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}
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if (this->jitter_ != nullptr) {
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float jitter = fabs(x) + fabs(y) + fabs(z);
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this->jitter_->publish_state(jitter);
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}
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}
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} // namespace adxl345
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} // namespace esphome
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