Home-IoT/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2024-11-26 08:55:22 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 6

DHT22 ignore invalid values (#614)

Browse source 
Fixes https://github.com/esphome/issues/issues/397
This commit is contained in:
Otto Winter 2019-06-06 13:13:28 +02:00 committed by GitHub
parent 0d36e66125
commit 73eea154d5
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
esphome/components/dht/dht.cpp
View file

@ -164,11 +164,18 @@ bool HOT DHT::read_sensor_(float *temperature, float *humidity, bool report_erro
} else {
uint16_t raw_humidity = (uint16_t(data[0] & 0xFF) << 8) | (data[1] & 0xFF);
uint16_t raw_temperature = (uint16_t(data[2] & 0xFF) << 8) | (data[3] & 0xFF);
*humidity = raw_humidity * 0.1f;
if ((raw_temperature & 0x8000) != 0)
raw_temperature = ~(raw_temperature & 0x7FFF);
if (raw_temperature == 1 && raw_humidity == 10) {
if (report_errors) {
ESP_LOGE(TAG, "Invalid temperature+humidity! Sensor reported 1°C and 1%% Hum");
}
return false;
}
*humidity = raw_humidity * 0.1f;
*temperature = int16_t(raw_temperature) * 0.1f;
}