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6d09e68b2e
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com> Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com> Co-authored-by: Andreas Riehl <andreas.riehl@acp.de> Co-authored-by: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
#include "esphome/core/log.h"
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#include "bh1900nux.h"
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namespace esphome {
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namespace bh1900nux {
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static const char *const TAG = "bh1900nux.sensor";
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// I2C Registers
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static const uint8_t TEMPERATURE_REG = 0x00;
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static const uint8_t CONFIG_REG = 0x01; // Not used and supported yet
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static const uint8_t TEMPERATURE_LOW_REG = 0x02; // Not used and supported yet
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static const uint8_t TEMPERATURE_HIGH_REG = 0x03; // Not used and supported yet
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static const uint8_t SOFT_RESET_REG = 0x04;
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// I2C Command payloads
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static const uint8_t SOFT_RESET_PAYLOAD = 0x01; // Soft Reset value
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static const float SENSOR_RESOLUTION = 0.0625f; // Sensor resolution per bit in degrees celsius
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void BH1900NUXSensor::setup() {
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// Initialize I2C device
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i2c::ErrorCode result_code =
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this->write_register(SOFT_RESET_REG, &SOFT_RESET_PAYLOAD, 1); // Software Reset to check communication
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if (result_code != i2c::ERROR_OK) {
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this->mark_failed(ESP_LOG_MSG_COMM_FAIL);
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return;
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}
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}
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void BH1900NUXSensor::update() {
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uint8_t temperature_raw[2];
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if (this->read_register(TEMPERATURE_REG, temperature_raw, 2) != i2c::ERROR_OK) {
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ESP_LOGE(TAG, ESP_LOG_MSG_COMM_FAIL);
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return;
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}
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// Combined raw value, unsigned and unaligned 16 bit
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// Temperature is represented in just 12 bits, shift needed
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int16_t raw_temperature_register_value = encode_uint16(temperature_raw[0], temperature_raw[1]);
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raw_temperature_register_value >>= 4;
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float temperature_value = raw_temperature_register_value * SENSOR_RESOLUTION; // Apply sensor resolution
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this->publish_state(temperature_value);
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}
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void BH1900NUXSensor::dump_config() {
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LOG_SENSOR("", "BH1900NUX", this);
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LOG_I2C_DEVICE(this);
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LOG_UPDATE_INTERVAL(this);
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}
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} // namespace bh1900nux
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} // namespace esphome
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