tof10120_sensor.cpp

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#include "tof10120_sensor.h"
#include "esphome/core/log.h"
#include "esphome/core/hal.h"
#include <cinttypes>
 
// Very basic support for TOF10120 distance sensor
 
namespace esphome::tof10120 {
 
static const char *const TAG = "tof10120";
static const uint8_t TOF10120_READ_DISTANCE_CMD[] = {0x00};
static const uint8_t TOF10120_DEFAULT_DELAY = 30;
 
static const uint8_t TOF10120_DIR_SEND_REGISTER = 0x0e;
static const uint8_t TOF10120_DISTANCE_REGISTER = 0x00;
 
static const uint16_t TOF10120_OUT_OF_RANGE_VALUE = 2000;
 
void TOF10120Sensor::dump_config() {
  LOG_SENSOR("", "TOF10120", this);
  LOG_UPDATE_INTERVAL(this);
  LOG_I2C_DEVICE(this);
}
 
void TOF10120Sensor::setup() {}
 
void TOF10120Sensor::update() {
  if (!this->write_bytes(TOF10120_DISTANCE_REGISTER, TOF10120_READ_DISTANCE_CMD, sizeof(TOF10120_READ_DISTANCE_CMD))) {
    ESP_LOGE(TAG, ESP_LOG_MSG_COMM_FAIL);
    this->status_set_warning();
    return;
  }
 
  uint8_t data[2];
  if (this->write(&TOF10120_DISTANCE_REGISTER, 1) != i2c::ERROR_OK) {
    this->status_set_warning();
    return;
  }
  delay(TOF10120_DEFAULT_DELAY);
  if (this->read(data, 2) != i2c::ERROR_OK) {
    ESP_LOGE(TAG, ESP_LOG_MSG_COMM_FAIL);
    this->status_set_warning();
    return;
  }
 
  uint32_t distance_mm = (data[0] << 8) | data[1];
  ESP_LOGI(TAG, "Data read: %" PRIu32 "mm", distance_mm);
 
  if (distance_mm == TOF10120_OUT_OF_RANGE_VALUE) {
    ESP_LOGW(TAG, "Distance measurement out of range");
    this->publish_state(NAN);
  } else {
    this->publish_state(distance_mm / 1000.0f);
  }
  this->status_clear_warning();
}
 
}  // namespace esphome::tof10120