# TCA9548A - 7ch i2C expander **URL:** \ **Category:** Uncategorized\ **Created:** [November 26, 2019, 4:05pm UTC](https://forum.xod.io/t/tca9548a-7ch-i2c-expander/2931 "2019-11-26T16:05:11Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![angus-fleming54](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.xod.io/angus-fleming54/32/1649_2.png) [@angus-fleming54](https://forum.xod.io/u/angus-fleming54)\ **Post date:** [November 26, 2019, 4:05pm UTC](https://forum.xod.io/t/tca9548a-7ch-i2c-expander/2931/1 "2019-11-26T16:05:11Z")
I’m new here, so apologize if I’m not asking the right question or in the right area… Is there a node/library for the TCA9548A i2C multiplexer?? I’m trying to recreate a project in XOD and can find all components except this one… ---
**Author:** ![robertspark](https://avatars.discourse-cdn.com/v4/letter/r/839c29/32.png) [@robertspark](https://forum.xod.io/u/robertspark)\ **Post date:** [November 26, 2019, 4:39pm UTC](https://forum.xod.io/t/tca9548a-7ch-i2c-expander/2931/2 "2019-11-26T16:39:51Z")
Looking at this example > **[Adafruit TCA9548A 1-to-8 I2C Multiplexer Breakout](https://learn.adafruit.com/adafruit-tca9548a-1-to-8-i2c-multiplexer-breakout/wiring-and-test)** > > You just found the perfect I2C sensor, and you want to wire up two or three or more of them to your Arduino when you realize "Uh oh, this chip has a fixed I2C address, and from what I know about I2C, you cannot have two devices with the same address... you don’t actually need a node / library. you could try to use the standard i2c nodes (begin-transmission + write-byte) to send the signals you require to toggle the outputs. Give it a go, good luck. ---
**Author:** ![robertspark](https://avatars.discourse-cdn.com/v4/letter/r/839c29/32.png) [@robertspark](https://forum.xod.io/u/robertspark)\ **Post date:** [November 26, 2019, 4:41pm UTC](https://forum.xod.io/t/tca9548a-7ch-i2c-expander/2931/3 "2019-11-26T16:41:39Z")
you probably want to follow this XOD guide as a work through > **[I²C Communication Basics](https://xod.io/docs/guide/i2c/)** > > How to use XOD nodes from the standard i2c library to talk to I2C/TWI devices