In the Arduino sketch it's just necessary to specify the SDA and SCL pins numbers as arguments to the BMP280_DEV's constructor: BMP280_DEV bmp280(6, 7) // User-defined I2C pins, SDA: 6, SCL: 7 I've made changes to allow user-defined pins with the ESP8266. tIIRFilter(IIR_FILTER_4) // Set the IIR filter to setting 4 tTempOversampling(OVERSAMPLING_X1) // Set the temperature oversampling to X1 tPresOversampling(OVERSAMPLING_X4) // Set the pressure oversampling to X4 BMP280_DEV - I2C Communications (Alternative Address), Default Configuration, Normal Conversion In this case the library’s begin() function should be called with BMP280_I2C_ALT_ADDR argument: bmp280.begin(BMP280_I2C_ALT_ADDR) // Default initialisation with alternative I2C address The I2C address 0x76 is the alternative address for the BMP280. XTaskCreatePinnedToCore( // Kick-off "TaskOne" pinned to core 1 SPIClass SPI1(HSPI) // Create (instantiate) the SPI1 object for HSPI operationīMP280_DEV bmp280(21, HSPI, SPI1) // Create BMP280_DEV object and set-up for HSPI operation, SCK 14, MOSI 13, MISO 27, SS 21ītTimeStandby(TIME_STANDBY_1000MS) // Set the standby time to 1 second (1000ms)īmp280.startNormalConversion() // Start NORMAL continuous conversion BMP280_DEV bmp280(21) // Create BMP280_DEV object and set-up for VSPI operation, SCK 5, MOSI 18, MISO 19, SS 21 #include // Include the BMP280_DEV.h library BMP280_DEV - ESP32 HSPI Communications, Default Configuration, Normal Conversion I’ve also included support for the ESP32’s HSPI port, (in addition to its normal VSPI). I changed the library’s name to BMP280_DEV. Serial.print(temperature) // Display the results If (bmp280.getMeasurements(temperature, pressure, altitude)) // Check if the measurement is complete
SPYPARTY SCL REPLAY SERIAL
Serial.begin(115200) // Initialise the serial portīmp280.begin() // Default initialisation, place the BMP280 into SLEEP_MODEītTimeStandby(TIME_STANDBY_2000MS) // Set the standby time to 2 secondsīmp280.startNormalConversion() // Start BMP280 continuous conversion in NORMAL_MODE #include // Include the BMP280.h libraryįloat temperature, pressure, altitude // Create the temperature, pressure and altitude variablesīMP280 bmp280 // Instantiate (create) a BMP280 object and set-up for I2C operation (address 0x77) BMP280 - I2C Communications, Default Configuration, Normal Conversion The library can be downloaded from my Github repository. In NORMAL mode the barometer only returns results at the specified standby time. The library supports I2C or SPI communications and both NORMAL, as well as FORCED modes of operation. Non-blocking operation means that the sketch does not wait for a temperature/pressure conversion to complete.
I2C or hardware SPI communications with configurable clock rates.Supports NORMAL or FORCED modes of operation.Returns temperature in degrees celius (☌), pressure in hectoPascals/millibar (hPa) and altitude in metres (m).I know that other BMP280 libraries exist, namely from Adafruit and Sparkfun, but this library offers a number of new features: I’ve just created a new Arduino compatible, non-blocking, I2C/SPI library for the Bosch BMP280 barometer.
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