# D1-mini hardware setup

**URL:** <https://wled.discourse.group/t/d1-mini-hardware-setup/14234>\
**Category:** Questions\
**Created:** [March 19, 2025, 1:08am UTC](https://wled.discourse.group/t/d1-mini-hardware-setup/14234 "2025-03-19T01:08:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![klrock](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/klrock/32/386_2.png) [@klrock](https://wled.discourse.group/u/klrock)\
**Post date:** [March 19, 2025, 1:08am UTC](https://wled.discourse.group/t/d1-mini-hardware-setup/14234/1 "2025-03-19T01:08:15Z")

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I am seting up a D1-mini to individually control 4 separate LED strings. I set the first three strings with GPIO 2, 4, and 3. When I choose 13 for the fourth string, the form asks for a clock GPIO. Why is this required and what should I use?

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**Author:** ![dedehai](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/dedehai/32/7265_2.png) [@dedehai](https://wled.discourse.group/u/dedehai)\
**Post date:** [March 19, 2025, 5:09am UTC](https://wled.discourse.group/t/d1-mini-hardware-setup/14234/2 "2025-03-19T05:09:30Z")

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D1 mini ESP8266 or ESP32?