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First try
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11e88019c2
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@ -8,6 +8,8 @@ static const char *TAG = "mhz19";
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static const uint8_t MHZ19_REQUEST_LENGTH = 8;
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static const uint8_t MHZ19_REQUEST_LENGTH = 8;
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static const uint8_t MHZ19_RESPONSE_LENGTH = 9;
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static const uint8_t MHZ19_RESPONSE_LENGTH = 9;
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static const uint8_t MHZ19_COMMAND_GET_PPM[] = {0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00};
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static const uint8_t MHZ19_COMMAND_GET_PPM[] = {0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00};
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static const uint8_t MHZ19_COMMAND_ABC_ENABLE[] = {0xff, 0x01, 0x79, 0xA0, 0x00, 0x00, 0x00, 0x00};
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static const uint8_t MHZ19_COMMAND_ABC_DISABLE[] = {0xff, 0x01, 0x79, 0x00, 0x00, 0x00, 0x00, 0x00};
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uint8_t mhz19_checksum(const uint8_t *command) {
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uint8_t mhz19_checksum(const uint8_t *command) {
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uint8_t sum = 0;
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uint8_t sum = 0;
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@ -17,6 +19,16 @@ uint8_t mhz19_checksum(const uint8_t *command) {
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return 0xFF - sum + 0x01;
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return 0xFF - sum + 0x01;
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}
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}
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void MHZ19Component::setup() {
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if (this->abc_logic_ == MHZ19_ABC_ENABLED) {
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ESP_LOGV(TAG, "Enabling ABC on boot");
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this->mhz19_write_command_(MHZ19_COMMAND_ABC_ENABLE, nullptr);
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} else if (this->abc_logic_ == MHZ19_ABC_DISABLED) {
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ESP_LOGV(TAG, "Disabling ABC on boot");
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this->mhz19_write_command_(MHZ19_COMMAND_ABC_DISABLE, nullptr);
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}
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}
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void MHZ19Component::update() {
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void MHZ19Component::update() {
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uint8_t response[MHZ19_RESPONSE_LENGTH];
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uint8_t response[MHZ19_RESPONSE_LENGTH];
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if (!this->mhz19_write_command_(MHZ19_COMMAND_GET_PPM, response)) {
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if (!this->mhz19_write_command_(MHZ19_COMMAND_GET_PPM, response)) {
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@ -7,21 +7,30 @@
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namespace esphome {
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namespace esphome {
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namespace mhz19 {
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namespace mhz19 {
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enum MHZ19ABCLogic {
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MHZ19_ABC_NONE = 0,
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MHZ19_ABC_ENABLED,
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MHZ19_ABC_DISABLED
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};
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class MHZ19Component : public PollingComponent, public uart::UARTDevice {
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class MHZ19Component : public PollingComponent, public uart::UARTDevice {
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public:
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public:
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float get_setup_priority() const override;
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float get_setup_priority() const override;
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void setup() override;
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void update() override;
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void update() override;
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void dump_config() override;
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void dump_config() override;
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void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
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void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
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void set_co2_sensor(sensor::Sensor *co2_sensor) { co2_sensor_ = co2_sensor; }
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void set_co2_sensor(sensor::Sensor *co2_sensor) { co2_sensor_ = co2_sensor; }
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void set_abc_enabled(bool abc_enabled) { abc_logic_ = abc_enabled ? MHZ19_ABC_ENABLED : MHZ19_ABC_DISABLED; }
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protected:
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protected:
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bool mhz19_write_command_(const uint8_t *command, uint8_t *response);
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bool mhz19_write_command_(const uint8_t *command, uint8_t *response);
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sensor::Sensor *temperature_sensor_{nullptr};
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sensor::Sensor *temperature_sensor_{nullptr};
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sensor::Sensor *co2_sensor_{nullptr};
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sensor::Sensor *co2_sensor_{nullptr};
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MHZ19ABCLogic abc_logic_{MHZ19_ABC_NONE}
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};
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};
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} // namespace mhz19
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} // namespace mhz19
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@ -6,6 +6,8 @@ from esphome.const import CONF_CO2, CONF_ID, CONF_TEMPERATURE, ICON_PERIODIC_TAB
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DEPENDENCIES = ['uart']
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DEPENDENCIES = ['uart']
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CONF_AUTOMATIC_BASELINE_CALIBRATION = 'automatic_baseline_calibration'
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mhz19_ns = cg.esphome_ns.namespace('mhz19')
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mhz19_ns = cg.esphome_ns.namespace('mhz19')
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MHZ19Component = mhz19_ns.class_('MHZ19Component', cg.PollingComponent, uart.UARTDevice)
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MHZ19Component = mhz19_ns.class_('MHZ19Component', cg.PollingComponent, uart.UARTDevice)
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@ -13,6 +15,7 @@ CONFIG_SCHEMA = cv.Schema({
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cv.GenerateID(): cv.declare_id(MHZ19Component),
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cv.GenerateID(): cv.declare_id(MHZ19Component),
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cv.Required(CONF_CO2): sensor.sensor_schema(UNIT_PARTS_PER_MILLION, ICON_PERIODIC_TABLE_CO2, 0),
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cv.Required(CONF_CO2): sensor.sensor_schema(UNIT_PARTS_PER_MILLION, ICON_PERIODIC_TABLE_CO2, 0),
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cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(UNIT_CELSIUS, ICON_THERMOMETER, 0),
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cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(UNIT_CELSIUS, ICON_THERMOMETER, 0),
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cv.Optional(CONF_AUTOMATIC_BASELINE_CALIBRATION): cv.boolean,
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}).extend(cv.polling_component_schema('60s')).extend(uart.UART_DEVICE_SCHEMA)
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}).extend(cv.polling_component_schema('60s')).extend(uart.UART_DEVICE_SCHEMA)
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@ -28,3 +31,6 @@ def to_code(config):
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if CONF_TEMPERATURE in config:
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if CONF_TEMPERATURE in config:
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sens = yield sensor.new_sensor(config[CONF_TEMPERATURE])
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sens = yield sensor.new_sensor(config[CONF_TEMPERATURE])
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cg.add(var.set_temperature_sensor(sens))
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cg.add(var.set_temperature_sensor(sens))
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if CONF_AUTOMATIC_BASELINE_CALIBRATION in config:
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cg.add(var.set_abc_enabled(config[CONF_AUTOMATIC_BASELINE_CALIBRATION]))
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