DFR0972 Change i2c address

Hi, the I2C address of the DFR0972 cannot be modified at present. If there is an address conflict with other I2C devices, you can use the Digital 1-to-8 I2C Multiplexer to solve this problem. The product link is: https://www.dfrobot.com/product-1780.html

For the subsequent versions of this product, we plan to add an additional MCU chip to enable the function of switchable I2C addresses.