How To Connect Multiple I2C devices With Same Address To A Raspberry Pi And Access Them One At A Time!Tuesday, April 19, 2016
The RPI I2C Hub card mounts onto the Raspberry Pi and allows to attach up to four I2C devices with the same I2C address and access them individually one at a time! (the card only uses one address, which means the board is at slave I2C address 0x71 to the Raspberry Pi).
You can also power I2C interface connections from the Raspberry Pi 3.3V or a different power supply as this card allows IO interfaces (I2C connections) to have different voltages from 2.7V up to 5V (so you can connect to Legacy 5V systems).
A few other features of the RPI I2C Hub card are the onboard terminators, allowing for up to 400KHz of operation and the interrupt pass-through. Each of the four ports provides interrupt pass-through to the Raspberry Pi, which eliminates inefficient polling of many IO devices.
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