# Inky wHAT breakout clarification

**URL:** <https://forums.pimoroni.com/t/inky-what-breakout-clarification/10024>\
**Category:** Support\
**Created:** [March 1, 2019, 10:14am UTC](https://forums.pimoroni.com/t/inky-what-breakout-clarification/10024 "2019-03-01T10:14:50Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![fisherthewol](https://avatars.discourse-cdn.com/v4/letter/f/3da27b/32.png) [@fisherthewol](https://forums.pimoroni.com/u/fisherthewol)\
**Post date:** [March 1, 2019, 10:14am UTC](https://forums.pimoroni.com/t/inky-what-breakout-clarification/10024/1 "2019-03-01T10:14:50Z")

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Heya!  
Got an inky wHat and could do with some clarification. The pins that are broken out on the underside of the screen include one labeled as “#4”; Is this BCM pin 4 - the one-wire default pin? If not which pin is it?  
Thanks in advance.

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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:** [March 1, 2019, 10:24am UTC](https://forums.pimoroni.com/t/inky-what-breakout-clarification/10024/2 "2019-03-01T10:24:29Z")

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It must be BCM 4 (physical pin 7), physical pin 4 is +5V. And I would have thought if it was +5V it would have been labeled +5V? It also mirrors the layout of pins 1,3,5,7,9.

> **[Raspberry Pi GPIO Pinout](https://pinout.xyz/#)**
>
> The comprehensive Add-on boards & GPIO Pinout guide for the Raspberry Pi

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<div class="post-metadata">

**Author:** ![fisherthewol](https://avatars.discourse-cdn.com/v4/letter/f/3da27b/32.png) [@fisherthewol](https://forums.pimoroni.com/u/fisherthewol)\
**Post date:** [March 3, 2019, 5:08pm UTC](https://forums.pimoroni.com/t/inky-what-breakout-clarification/10024/3 "2019-03-03T17:08:58Z")

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Yep, tested this and it was BCM 4. Thanks for replying.

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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:** [March 3, 2019, 6:42pm UTC](https://forums.pimoroni.com/t/inky-what-breakout-clarification/10024/4 "2019-03-03T18:42:52Z")

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Ah there you go thanks for posting back confirmation.