# Esp8266ex

**URL:** <https://wled.discourse.group/t/esp8266ex/14452>\
**Category:** Hardware\
**Created:** [May 7, 2025, 5:03pm UTC](https://wled.discourse.group/t/esp8266ex/14452 "2025-05-07T17:03:20Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Skubc](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/skubc/32/9572_2.png) [@Skubc](https://wled.discourse.group/u/Skubc)\
**Post date:** [May 7, 2025, 5:03pm UTC](https://wled.discourse.group/t/esp8266ex/14452/1 "2025-05-07T17:03:20Z")

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hello,

i would like to make firmware for ESP8266EX, which is 160 mhz and has 16 mb rom. I would use the nightly build. I would like to know which microcontroller would be best to use and which tags should I change in step 1a.

microcontroller specifications:

> **[0a-esp8266ex\_datasheet\_en.pdf](https://www.espressif.com/sites/default/files/documentation/0a-esp8266ex_datasheet_en.pdf)**

Thank you very much for your help

Regards Andi

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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:** [May 8, 2025, 8:08am UTC](https://wled.discourse.group/t/esp8266ex/14452/2 "2025-05-08T08:08:44Z")

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normal bin file does not run?

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**Author:** ![Skubc](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/skubc/32/9572_2.png) [@Skubc](https://wled.discourse.group/u/Skubc)\
**Post date:** [May 8, 2025, 8:33am UTC](https://wled.discourse.group/t/esp8266ex/14452/3 "2025-05-08T08:33:24Z")

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It works, but it reduces flash memory. And sometimes frequnecy.

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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:** [May 8, 2025, 10:11am UTC](https://wled.discourse.group/t/esp8266ex/14452/4 "2025-05-08T10:11:35Z")

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make your own env, use larger partitions.

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**Author:** ![Skubc](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/skubc/32/9572_2.png) [@Skubc](https://wled.discourse.group/u/Skubc)\
**Post date:** [May 8, 2025, 10:30am UTC](https://wled.discourse.group/t/esp8266ex/14452/5 "2025-05-08T10:30:01Z")

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I would do this using [WLED Online compiler](https://wled-compile.github.io/?lang=en)

so I’m asking which microcontroller I can use to build it.

 ![image](https://global.discourse-cdn.com/free1/uploads/wled/original/2X/9/9ec8b87a01da787079e46852f4e8920ca4457d49.png)

or which ones I need to define anew in step 1a

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<div class="post-metadata">

**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:** [May 8, 2025, 2:01pm UTC](https://wled.discourse.group/t/esp8266ex/14452/6 "2025-05-08T14:01:45Z")

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just use ESP8266, change to larger partitions.

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<div class="post-metadata">

**Author:** ![Skubc](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/skubc/32/9572_2.png) [@Skubc](https://wled.discourse.group/u/Skubc)\
**Post date:** [May 8, 2025, 3:11pm UTC](https://wled.discourse.group/t/esp8266ex/14452/7 "2025-05-08T15:11:42Z")

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Tnx.

I will give it a try 🙂

Regards Andi