中文

SP_Weather has two sensors, magnetic sensor QMC7983, which is a triaxial magnetic sensor with built-in sensitivity compensation and NTC, with excellent dynamic range and precision as well as ultra-low power consumption. The temperature, humidity and barometric pressure sensor BME280 can simultaneously measure temperature, humidity and barometric pressure. The data of the two sensors can be read according to their different device addresses.

See Specification for more information

The corresponding IO port in the MCU schematic diagram is configured as I2C function pin.

• C

    fpioa_set_function(WEATHER_SCL, FUNC_I2C0_SCLK + WEATHER_I2C_DEVICE * 2); // WEATHER_SCL: 6;
    fpioa_set_function(WEATHER_SDA, FUNC_I2C0_SDA + WEATHER_I2C_DEVICE * 2); // WEATHER_SDA: 7;

• MaixPy

Configure in I2C initialization

• C

    maix_i2c_init(WEATHER_I2C_DEVICE, 7, 400000); // WEATHER_I2C_DEVICE: 0;

• MaixPy

    i2c_bus = I2C(I2C.I2C0, freq=100*1000, scl=6, sda=7) # scl: io_6, sda: io_7

• Process

  1. Initializing sensor
  2. Read sensor data

• C

    rslt = qmc_init(); // Magnetic sensor QMC7983 init 
    rslt = bme280_init(&dev); // Temperature, humidity and pressure sensors BME280 init 
    stream_sensor_data_normal_mode(&dev); // read and print sensor data

• MaixPy

    weather=SPWEATHER(i2c=i2c_bus) # create sp_weather
    while 1:
        time.sleep_ms(500)
        print(weather.qmc_read_xyz) # QMC7983 read data
        print(weather.bme_values) # BME280 read data

• C

  

• MaixPy

  

See LICENSE file.