SPI master read BME280

Sample code for reading values from a BME280 via ESP-IDF's SPI master driver

To see the main code check [main/main.c] for comments that explain some of implementation details.

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This sample code implement procedures to read values from BME280 sensor (pressure, temperature, humidity) via ESP-IDF's SPI master driver.

.. _ESP32 datasheet: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf .. _Bosch's BMP280 datasheet: https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BMP280-DS001.pdf