# How to use GPIO on ASR-A501 & AFE-RM02 (similar to RSB-3810/3720)

**URL:** <https://forum.aim-linux.advantech.com/t/how-to-use-gpio-on-asr-a501-afe-rm02-similar-to-rsb-3810-3720/1257>\
**Category:** Technical Supports\
**Tags:** arm\
**Created:** [August 20, 2025, 4:28am UTC](https://forum.aim-linux.advantech.com/t/how-to-use-gpio-on-asr-a501-afe-rm02-similar-to-rsb-3810-3720/1257 "2025-08-20T04:28:11Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Tetsuya\_Kawahara](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.aim-linux.advantech.com/tetsuya_kawahara/32/476_2.png) [@Tetsuya\_Kawahara](https://forum.aim-linux.advantech.com/u/Tetsuya_Kawahara)\
**Post date:** [August 20, 2025, 4:28am UTC](https://forum.aim-linux.advantech.com/t/how-to-use-gpio-on-asr-a501-afe-rm02-similar-to-rsb-3810-3720/1257/1 "2025-08-20T04:28:11Z")

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Hello,

Could you please provide documentation about GPIO usage on the ASR-A501 and AFE-RM02?  
I am looking for details similar to the GPIO pin/number mapping shown in the RSB-3810 and RSB-3720 wikis:

RSB-3810 wiki (GPIO Testing Method):

> **[RSB-3810 user guide Ubuntu22.04 - ESS-WIKI](https://ess-wiki.advantech.com.tw/view/RSB-3810_user_guide_Ubuntu22.04#GPIO.E4.BD.BF.E7.94.A8.E6.96.B9.E6.B3.95.28GPIO_Testing_Method.29:)**

RSB-3720 wiki (GPIO Operating Method):

> **[RSB-3720 user guide - ESS-WIKI](https://ess-wiki.advantech.com.tw/view/RSB-3720_user_guide#GPIO.E4.BD.BF.E7.94.A8.E6.96.B9.E6.B3.95.28GPIO_Operating_Method.29)**

Thanks.

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<div class="post-metadata">

**Author:** ![phill.liu](https://avatars.discourse-cdn.com/v4/letter/p/a8b319/32.png) [@phill.liu](https://forum.aim-linux.advantech.com/u/phill.liu)\
**Post date:** [August 21, 2025, 6:09am UTC](https://forum.aim-linux.advantech.com/t/how-to-use-gpio-on-asr-a501-afe-rm02-similar-to-rsb-3810-3720/1257/2 "2025-08-21T06:09:01Z")

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HI Sir ,

Since the AFE-RM02 content is currently integrated into the overall AFE-RM761 manual, kindly refer to the following chart.

 ![image](https://us1.discourse-cdn.com/flex016/uploads/aim_linux/original/2X/5/5c660ff0c990bcab7a0584cc7a40e382176daf74.png)

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<div class="post-metadata">

**Author:** ![Tetsuya\_Kawahara](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.aim-linux.advantech.com/tetsuya_kawahara/32/476_2.png) [@Tetsuya\_Kawahara](https://forum.aim-linux.advantech.com/u/Tetsuya_Kawahara)\
**Post date:** [August 21, 2025, 6:22am UTC](https://forum.aim-linux.advantech.com/t/how-to-use-gpio-on-asr-a501-afe-rm02-similar-to-rsb-3810-3720/1257/3 "2025-08-21T06:22:54Z")

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Thank you for your prompt reply and for providing the reference.