# WLED 0.13.3, D1 mini, ws2801, GPIO 13 and 15 **URL:** \ **Category:** Questions\ **Created:** [September 24, 2022, 2:35pm UTC](https://wled.discourse.group/t/wled-0-13-3-d1-mini-ws2801-gpio-13-and-15/5996 "2022-09-24T14:35:49Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![EDSTOBI](https://avatars.discourse-cdn.com/v4/letter/e/aca169/32.png) [@EDSTOBI](https://wled.discourse.group/u/EDSTOBI)\ **Post date:** [September 24, 2022, 2:35pm UTC](https://wled.discourse.group/t/wled-0-13-3-d1-mini-ws2801-gpio-13-and-15/5996/1 "2022-09-24T14:35:49Z")
Hi I am wondering if I can use GPIO 13 for data and 15 for clk? In a lot of comments I read always GPIO1&2 I am using a d1 mini pro (esp8266) and WLED v0.13v3 and my led wount light up. Do I have to ad resistor for pull up or PULL down? Thx edstobi ---
**Author:** ![Jinx](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@Jinx](https://wled.discourse.group/u/Jinx)\ **Post date:** [September 25, 2022, 12:15am UTC](https://wled.discourse.group/t/wled-0-13-3-d1-mini-ws2801-gpio-13-and-15/5996/2 "2022-09-25T00:15:16Z")
This may help you out. [D1 mini, WS2801, WLED](https://wled.discourse.group/t/d1-mini-ws2801-wled/4051) The KB also says this: \* WS2801 (uses gpio0 and 2). If that is still accurate I would assume 0 would be for clk. [FAQ - WLED Project](https://kno.wled.ge/basics/faq/#what-led-strip-hardware-is-supported-by-wled) ---
**Author:** ![blazoncek](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/blazoncek/32/1886_2.png) [@blazoncek](https://wled.discourse.group/u/blazoncek)\ **Post date:** [September 28, 2022, 6:29am UTC](https://wled.discourse.group/t/wled-0-13-3-d1-mini-ws2801-gpio-13-and-15/5996/3 "2022-09-28T06:29:09Z")
No. GPIO15 is CS (chip select, 14 is SCLK) You can safely use MOSI (GPIO13) & CLK (GPIO14) for SPI based chipsets (WS2801). This is also the _proper_ way to use those chipsets and get the most out of ESP8266. As for resistors that depend on line characteristics. Consult @Quindor 's articles.