mcp3221_sensor.cpp

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#include "mcp3221_sensor.h"
#include "esphome/core/hal.h"
#include "esphome/core/log.h"
 
namespace esphome {
namespace mcp3221 {
 
static const char *const TAG = "mcp3221";
 
float MCP3221Sensor::sample() {
  uint8_t data[2];
  if (this->read(data, 2) != i2c::ERROR_OK) {
    ESP_LOGW(TAG, "Read failed");
    this->status_set_warning();
    return NAN;
  }
  this->status_clear_warning();
 
  uint16_t value = encode_uint16(data[0], data[1]);
  float voltage = value * this->reference_voltage_ / 4096.0f;
 
  return voltage;
}
 
void MCP3221Sensor::update() {
  float v = this->sample();
  this->publish_state(v);
}
 
}  // namespace mcp3221
}  // namespace esphome