# Stacking AutomationHat?

**URL:** <https://forums.pimoroni.com/t/stacking-automationhat/5401>\
**Category:** Support\
**Created:** [July 24, 2017, 11:04am UTC](https://forums.pimoroni.com/t/stacking-automationhat/5401 "2017-07-24T11:04:59Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![pj.lca](https://avatars.discourse-cdn.com/v4/letter/p/f19dbf/32.png) [@pj.lca](https://forums.pimoroni.com/u/pj.lca)\
**Post date:** [July 24, 2017, 11:04am UTC](https://forums.pimoroni.com/t/stacking-automationhat/5401/1 "2017-07-24T11:04:59Z")

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Hi - newby building a 4 stepping motor rig and would like to know if I can stack an Automation Hat on top of two Adafruit stepper cards on a Pi 3?

If so - what IC2 address does I use?

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**Author:** ![gadgetoid](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/gadgetoid/32/13_2.png) [@gadgetoid](https://forums.pimoroni.com/u/gadgetoid)\
**Post date:** [July 25, 2017, 12:49pm UTC](https://forums.pimoroni.com/t/stacking-automationhat/5401/2 "2017-07-25T12:49:45Z")

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You can see the pins (and i2c addresses) Automation HAT uses here: [https://pinout.xyz/pinout/automation\_hat](https://pinout.xyz/pinout/automation_hat)

If any of these conflict, then you wont be able to stack it directly (unless it’s a conflict of two features you don’t mind losing) but you might be able to wire it piecemeal.

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**Author:** ![pj.lca](https://avatars.discourse-cdn.com/v4/letter/p/f19dbf/32.png) [@pj.lca](https://forums.pimoroni.com/u/pj.lca)\
**Post date:** [July 25, 2017, 4:55pm UTC](https://forums.pimoroni.com/t/stacking-automationhat/5401/3 "2017-07-25T16:55:12Z")

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Thanks Phil - I’ll give it a go and see what happens.

Appreciate the quick response.

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**Author:** ![KeithPeterson](https://avatars.discourse-cdn.com/v4/letter/k/dc4da7/32.png) [@KeithPeterson](https://forums.pimoroni.com/u/KeithPeterson)\
**Post date:** [February 4, 2022, 2:30am UTC](https://forums.pimoroni.com/t/stacking-automationhat/5401/4 "2022-02-04T02:30:41Z")

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Were you able to get stacked automation hats working?

If so, I’m curious how the interface package would address each board…

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**Author:** ![alphanumeric](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/alphanumeric/32/2729_2.png) [@alphanumeric](https://forums.pimoroni.com/u/alphanumeric)\
**Post date:** [February 4, 2022, 9:33am UTC](https://forums.pimoroni.com/t/stacking-automationhat/5401/5 "2022-02-04T09:33:05Z")

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You can’t stack **two automation hats**. Not directly anyway. They will just conflict with each other. They will both be trying to use the same i2c addresses.  
You would have to use something like this.  
[TCA9548A I2C Multiplexer – Pimoroni](https://shop.pimoroni.com/products/tca9548a-i2c-multiplexer)  
Even then, there are all the other GPIO pins used to contend with, relay, input, output.