vamoosebbf / sp_weather

气象模块(包含 BME280 和 QMC7983 两颗传感器， 能够检测气压，温度，湿度， 磁力) 在 K210 上的 C 和 MaixPy 驱动

SP_Weather Module User Guide

中文

Directory Structure

Directory	Description
doc	Reference documentation
img	Images
script	Maixpy script example
src	C program example based on the standalone sdk

Introduce

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

Pin figure

Mode connection

MCU:FUN(IO)	SP_Weather
I2C:SDA(IO_7)	SDA
NC(IO_15)	NC
NC(IO_20)	NC
NC(IO_21)	NC
NC(IO_8)	NC
I2C:SCL(IO_6)	SCL
3.3V	3.3V
GND	GND

MCU configuration

IO port configuration

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

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

SP_Weather configuration

Usage

• 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

Runtime enviroments

Language	Boards	SDK/Firmware version
C	MaixCube	kendryte-standalone-sdk v0.5.6
MaixPy	MaixCube	maixpy v0.5.1

Result

• C

  

• MaixPy

  

LISENCE

See LICENSE file.

Other information

Version	Editor	Date
v1.0	vamoosebbf	2020.12.2