Hi Sir: I verified my BMP280 API and get the same results, no matter 32bit/64bit/double. Could you download BMP280 API from BST homepage and compare it with your source code to look for the difference? Please click two follow link to know BMP280 information and get BMP280 API. https://www.bosch-sensortec.com/products/environmental-sensors/pressure-sensors/bmp280/ https://github.com/BoschSensortec/BMP280_driver
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