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CCS811 env_data

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Otto Winter 2019-05-14 11:40:35 +02:00
parent dd79e37933
commit 6306d44955
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GPG key ID: DB66C0BE6013F97E
3 changed files with 42 additions and 1 deletions
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24
esphome/components/ccs811/ccs811.cpp
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@ -82,6 +82,30 @@ void CCS811Component::update() {
this->tvoc_->publish_state(tvoc);
this->status_clear_warning();
this->send_env_data_();
}
void CCS811Component::send_env_data_() {
if (this->humidity_ == nullptr && this->temperature_ == nullptr)
return;
float humidity = NAN;
if (this->humidity_ != nullptr)
humidity = this->humidity_->state;
if (isnan(humidity) || humidity < 0 || humidity > 100)
humidity = 50;
float temperature = NAN;
if (this->temperature_ != nullptr)
temperature = this->temperature_->state;
if (isnan(temperature) || temperature < -25 || temperature > 50)
temperature = 25;
// temperature has a 25° offset to allow negative temperatures
temperature += 25;
// only 0.5 fractions are supported (application note)
auto hum_value = static_cast<uint8_t>(roundf(humidity * 2));
auto temp_value = static_cast<uint8_t>(roundf(temperature * 2));
this->write_bytes(0x05, {hum_value, 0x00, temp_value, 0x00});
}
void CCS811Component::dump_config() {
ESP_LOGCONFIG(TAG, "CCS811");

7
esphome/components/ccs811/ccs811.h
View file

@ -13,6 +13,8 @@ class CCS811Component : public PollingComponent, public i2c::I2CDevice {
void set_co2(sensor::Sensor *co2) { co2_ = co2; }
void set_tvoc(sensor::Sensor *tvoc) { tvoc_ = tvoc; }
void set_baseline(uint16_t baseline) { baseline_ = baseline; }
void set_humidity(sensor::Sensor *humidity) { humidity_ = humidity; }
void set_temperature(sensor::Sensor *temperature) { temperature_ = temperature; }
/// Setup the sensor and test for a connection.
void setup() override;
@ -28,6 +30,7 @@ class CCS811Component : public PollingComponent, public i2c::I2CDevice {
bool status_has_error_() { return this->read_status_().value_or(1) & 1; }
bool status_app_is_valid_() { return this->read_status_().value_or(0) & (1 << 4); }
bool status_has_data_() { return this->read_status_().value_or(0) & (1 << 3); }
void send_env_data_();
enum ErrorCode {
UNKNOWN,
@ -41,6 +44,10 @@ class CCS811Component : public PollingComponent, public i2c::I2CDevice {
sensor::Sensor *co2_{nullptr};
sensor::Sensor *tvoc_{nullptr};
optional<uint16_t> baseline_{};
/// Input sensor for humidity reading.
sensor::Sensor *humidity_{nullptr};
/// Input sensor for temperature reading.
sensor::Sensor *temperature_{nullptr};
};
} // namespace ccs811

12
esphome/components/ccs811/sensor.py
View file

@ -2,7 +2,7 @@ import esphome.codegen as cg
import esphome.config_validation as cv
from esphome.components import i2c, sensor
from esphome.const import CONF_ID, ICON_GAS_CYLINDER, ICON_RADIATOR, UNIT_PARTS_PER_MILLION, \
UNIT_PARTS_PER_BILLION
UNIT_PARTS_PER_BILLION, CONF_TEMPERATURE, CONF_HUMIDITY
DEPENDENCIES = ['i2c']
@ -17,7 +17,10 @@ CONFIG_SCHEMA = cv.Schema({
cv.GenerateID(): cv.declare_id(CCS811Component),
cv.Required(CONF_ECO2): sensor.sensor_schema(UNIT_PARTS_PER_MILLION, ICON_GAS_CYLINDER, 0),
cv.Required(CONF_TVOC): sensor.sensor_schema(UNIT_PARTS_PER_BILLION, ICON_RADIATOR, 0),
cv.Optional(CONF_BASELINE): cv.hex_uint16_t,
cv.Optional(CONF_TEMPERATURE): cv.use_id(sensor.Sensor),
cv.Optional(CONF_HUMIDITY): cv.use_id(sensor.Sensor),
}).extend(cv.polling_component_schema('60s')).extend(i2c.i2c_device_schema(0x5A))
@ -33,3 +36,10 @@ def to_code(config):
if CONF_BASELINE in config:
cg.add(var.set_baseline(config[CONF_BASELINE]))
if CONF_TEMPERATURE in config:
sens = yield cg.get_variable(config[CONF_TEMPERATURE])
cg.add(var.set_temperature(sens))
if CONF_HUMIDITY in config:
sens = yield cg.get_variable(config[CONF_HUMIDITY])
cg.add(var.set_humidity(sens))