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negative values for all DHT22 variants (#6074)

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Co-authored-by: Samuel Sieb <samuel@sieb.net>
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Samuel Sieb 2024-01-12 01:20:08 -08:00 committed by Keith Burzinski
parent a6f864a4a3
commit 2cda6462f3
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GPG key ID: 802564C5F0EEFFBE
1 changed files with 6 additions and 2 deletions
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6
esphome/components/dht/dht.cpp
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@ -217,8 +217,12 @@ bool HOT IRAM_ATTR DHT::read_sensor_(float *temperature, float *humidity, bool r
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);
if (this->model_ != DHT_MODEL_DHT22_TYPE2 && (raw_temperature & 0x8000) != 0)
if (raw_temperature & 0x8000) {
if (!(raw_temperature & 0x4000))
raw_temperature = ~(raw_temperature & 0x7FFF);
} else if (raw_temperature & 0x800) {
raw_temperature |= 0xf000;
}
if (raw_temperature == 1 && raw_humidity == 10) {
if (report_errors) {