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mhz19: add detection of B sensor revision

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it will allow to report exact sensor type in dump config
and later will be used for turning off autocalibration.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
This commit is contained in:
Igor Mammedov 2019-05-05 15:55:06 +02:00
parent 568da66e04
commit 886f84af29
2 changed files with 25 additions and 1 deletions
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24
esphome/components/mhz19/mhz19.cpp
View File

@ -25,7 +25,29 @@ const char *dump_data_buf(const uint8_t *data) {
return hex_buf; return hex_buf;
} }
static bool setup_done;
void MHZ19Component::setup() {
uint8_t response[MHZ19_PDU_LENGTH];
while (!this->mhz19_write_command_(MHZ19_COMMAND_GET_PPM, response)) {
delay(500);
}
/* MH-Z19B(s == 0) and MH-Z19(s != 0) */
uint8_t s = response[5];
if (response[5] == 0 && this->model_b_ == false) {
ESP_LOGD(TAG, "MH-Z19B detected");
this->model_b_ = true;
}
setup_done = true;
}
void MHZ19Component::update() { void MHZ19Component::update() {
if (!setup_done) {
return;
}
uint8_t response[MHZ19_PDU_LENGTH]; uint8_t response[MHZ19_PDU_LENGTH];
if (!this->mhz19_write_command_(MHZ19_COMMAND_GET_PPM, response)) { if (!this->mhz19_write_command_(MHZ19_COMMAND_GET_PPM, response)) {
ESP_LOGW(TAG, "Reading data from MHZ19 failed!"); ESP_LOGW(TAG, "Reading data from MHZ19 failed!");
@ -100,7 +122,7 @@ bool MHZ19Component::mhz19_write_command_(const uint8_t *command, uint8_t *respo
} }
float MHZ19Component::get_setup_priority() const { return setup_priority::DATA; } float MHZ19Component::get_setup_priority() const { return setup_priority::DATA; }
void MHZ19Component::dump_config() { void MHZ19Component::dump_config() {
ESP_LOGCONFIG(TAG, "MH-Z19:"); ESP_LOGCONFIG(TAG, "MH-Z19%s:", this->model_b_ ? "B" : "");
LOG_SENSOR(" ", "CO2", this->co2_sensor_); LOG_SENSOR(" ", "CO2", this->co2_sensor_);
LOG_SENSOR(" ", "Temperature", this->temperature_sensor_); LOG_SENSOR(" ", "Temperature", this->temperature_sensor_);
} }

2
esphome/components/mhz19/mhz19.h
View File

@ -11,6 +11,7 @@ class MHZ19Component : public PollingComponent, public uart::UARTDevice {
public: public:
float get_setup_priority() const override; float get_setup_priority() const override;
void setup() override;
void update() override; void update() override;
void dump_config() override; void dump_config() override;
@ -22,6 +23,7 @@ class MHZ19Component : public PollingComponent, public uart::UARTDevice {
sensor::Sensor *temperature_sensor_{nullptr}; sensor::Sensor *temperature_sensor_{nullptr};
sensor::Sensor *co2_sensor_{nullptr}; sensor::Sensor *co2_sensor_{nullptr};
bool model_b_;
}; };
} // namespace mhz19 } // namespace mhz19