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mhz19: ignore data from sensor while it's booting

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Reported CO2 might be not correct while sensor is booting and
while it boots it reports value 15000 in response at offset
6-7. So skip reporting till this value is being reurned.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
This commit is contained in:
Igor Mammedov 2019-05-05 15:45:54 +02:00 committed by nur
parent a78a98bef5
commit 3545803c87
1 changed files with 7 additions and 0 deletions
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7
esphome/components/mhz19/mhz19.cpp
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@ -39,6 +39,13 @@ void MHZ19Component::update() {
return;
}
/* Sensor reports U(15000) during boot, ingnore reported CO2 until it boots */
uint16_t u = (response[6] << 8) + response[7];
if (u == 15000) {
ESP_LOGD(TAG, "Sensor is booting");
return;
}
this->status_clear_warning();
const uint16_t ppm = (uint16_t(response[2]) << 8) | response[3];
const int temp = int(response[4]) - 40;