Home-IoT/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2024-11-26 00:48:19 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 7

Improve temperature precision in BME280 and BMP280 (#6124)

Browse source 
* Update bme280_base.cpp

Change read_temperature to get better precision

  float const temperature = (*t_fine * 5 + 128);
  return temperature / 25600.0f;

* Update bmp280.cpp

increase precision in read_temperature

* Update bmp280.cpp

clang-format correction
This commit is contained in:
jxl77 2024-01-21 02:57:39 +01:00 committed by GitHub
parent 0cbc06a9b9
commit c35a21773e
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
2 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
esphome/components/bme280_base/bme280_base.cpp
View file

@ -265,8 +265,8 @@ float BME280Component::read_temperature_(const uint8_t *data, int32_t *t_fine) {
int32_t const var2 = (((((adc >> 4) - t1) * ((adc >> 4) - t1)) >> 12) * t3) >> 14; int32_t const var2 = (((((adc >> 4) - t1) * ((adc >> 4) - t1)) >> 12) * t3) >> 14;
*t_fine = var1 + var2; *t_fine = var1 + var2;
float const temperature = (*t_fine * 5 + 128) >> 8; float const temperature = (*t_fine * 5 + 128);
return temperature / 100.0f; return temperature / 25600.0f;
} }
float BME280Component::read_pressure_(const uint8_t *data, int32_t t_fine) { float BME280Component::read_pressure_(const uint8_t *data, int32_t t_fine) {

4
esphome/components/bmp280/bmp280.cpp
View file

@ -200,8 +200,8 @@ float BMP280Component::read_temperature_(int32_t *t_fine) {
int32_t var2 = (((((adc >> 4) - t1) * ((adc >> 4) - t1)) >> 12) * t3) >> 14; int32_t var2 = (((((adc >> 4) - t1) * ((adc >> 4) - t1)) >> 12) * t3) >> 14;
*t_fine = var1 + var2; *t_fine = var1 + var2;
float temperature = (*t_fine * 5 + 128) >> 8; float temperature = (*t_fine * 5 + 128);
return temperature / 100.0f; return temperature / 25600.0f;
} }
float BMP280Component::read_pressure_(int32_t t_fine) { float BMP280Component::read_pressure_(int32_t t_fine) {