stm32f030 I2C 读取sht20温湿度度，模拟I2C可以自己换IO口， 同时实现了NRF24l01 无线模块spi 无线传送数据(Stm32f030 I2C reads the temperature and humidity of sht20, simulates that I2C can change the IO port by itself, and realizes the wireless data transmission of nRF24L01 wireless mod