Need Help with SRF02 sensors


I need your help urgently because I am having a project in robot(Dumper). I have a problem which is I need to use 2 sensors of type SRF02 and I need to know how to connect these 2 sensors to my evaluation kit EVK1100(AVR32 ATMEL mcu). I know how to connect one sensor and read the range but the problem now is that I must use 2 sensors and I have only one TWI interface on the board (I am using I2c)…

Thanks in advance.

Embedded system student