sascha/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2025-03-15 15:18:16 +00:00
Code Issues Releases Wiki Activity

mhz19: ignore data from sensor while it's booting

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
esphome/components/mhz19/mhz19.cpp
View File

@ -39,6 +39,13 @@ void MHZ19Component::update() {
return; 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(); this->status_clear_warning();
const uint16_t ppm = (uint16_t(response[2]) << 8) | response[3]; const uint16_t ppm = (uint16_t(response[2]) << 8) | response[3];
const int temp = int(response[4]) - 40; const int temp = int(response[4]) - 40;