If you need to control more than one device that uses the same I2C bus, then you need the TCA9548A I2C Multiplexer 1-to-8 Breakout Board from PMD Way (with free delivery, worldwide).

With a little simple coding the TCA9548A can direct your host microcontroller to one of eight separate I2C buses.

Furthermore, the TCA9548A can also act as a level converter, so you can have varying device bus and operating voltages between 1.8 and 5V DC.

Finally, the TCA9548A supports I2C hot-swap of bus devices, and supports the usual 400 kHz operating mode used by the majority of I2C bus devices.

Inline header pins are included, but not soldered to the board.

• 1-to-8 Bidirectional Translating Switches
• I2C Bus and SMBus Compatible
• Active-Low Reset Input
• Three Address Pins, Allowing up to Eight TCA9548A Devices on the I2C Bus
• Channel Selection Through an I2C Bus, In Any Combination
• Power Up With All Switch Channels Deselected
• Low RON Switches
• Allows Voltage-Level Translation Between 1.8-V, 2.5-V, 3.3-V, and 5-V Buses
• No Glitch on Power Up
• Supports Hot Insertion
• Low Standby Current
• Operating Power-Supply Voltage Range of 1.65 V to 5.5 V
• 5V Tolerant Inputs
• 0- to 400-kHz Clock Frequency
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22
  • 2000-V Human-Body Model (A114-A)
  • 200-V Machine Model (A115-A)
  • 1000-V Charged-Device Model (C101)