Hi there,
there are 2 communication ways. One is I2C and the other is UART. We suggest I2C, You have a 7-bit address. That means you can address up to 127 slaves. The number of devices connected to the bus is only limited by the total allowed bus capacitance of 400 pF. So the number will be less than 127. but it do supports 9 or 12. for more info, please refer to <LINK_TEXT text=“https://www.bluedot.space/tutorials/how … n-i2c-bus/”>https://www.bluedot.space/tutorials/how-many-devices-can-you-connect-on-i2c-bus/</LINK_TEXT>. thanks.
Bill