# Can I using GPIO4 for input in WP7605

**URL:** <https://mangoh.discourse.group/t/can-i-using-gpio4-for-input-in-wp7605/9714>\
**Category:** Uncategorized\
**Created:** [October 14, 2021, 7:37am UTC](https://mangoh.discourse.group/t/can-i-using-gpio4-for-input-in-wp7605/9714 "2021-10-14T07:37:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![bruceke](https://avatars.discourse-cdn.com/v4/letter/b/0ea827/32.png) [@bruceke](https://mangoh.discourse.group/u/bruceke)\
**Post date:** [October 14, 2021, 7:37am UTC](https://mangoh.discourse.group/t/can-i-using-gpio4-for-input-in-wp7605/9714/1 "2021-10-14T07:37:25Z")

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Can I using GPIO4 for input in WP7605?

I got error message when I export GPIO4 as input pin :  
root@swi-mdm9x28-wp:~# echo 4 \> /sys/class/gpio/export  
sh: write error: Operation not permitted

and I check the gpio configure with AT command :  
AT+WIOCFG?4  
+WIOCFG: 4,3,0,0,1,0,0

it seems set to sim detect pin

 ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/b/b6957528eedaf20b75e0d677bf34a0918751cd4f.png)

It seems that the setting of this pin cannot be changed  
 ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/d/dc824c73e9a2a19958b2c0b25242cb4b467462d5.png)

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [October 14, 2021, 11:34am UTC](https://mangoh.discourse.group/t/can-i-using-gpio4-for-input-in-wp7605/9714/2 "2021-10-14T11:34:50Z")

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I don’t see problem in WP76 FW R13.3:

```auto

at+wiocfg?
+WIOCFG: 2,16,0,0,1,0,0
+WIOCFG: 4,0,0,0,1,0,0
+WIOCFG: 6,16,0,0,1,0,0
+WIOCFG: 7,16,0,0,1,0,0
+WIOCFG: 8,16,0,0,1,0,0
+WIOCFG: 13,16,0,0,1,0,0
+WIOCFG: 21,16,0,0,1,0,0
+WIOCFG: 22,16,0,0,1,0,0
+WIOCFG: 23,16,0,0,1,0,0
+WIOCFG: 24,16,0,0,1,0,0
+WIOCFG: 25,16,0,0,1,0,0
+WIOCFG: 28,16,0,0,1,0,0
+WIOCFG: 29,16,0,0,1,0,0
+WIOCFG: 30,16,0,0,1,0,0
+WIOCFG: 31,16,0,0,1,0,0
+WIOCFG: 32,16,0,0,1,0,0
+WIOCFG: 33,16,0,0,1,0,0
+WIOCFG: 35,16,0,0,1,0,0
+WIOCFG: 42,16,0,0,1,0,0

OK
at+wiocfg=4,16
OK
ati3
Manufacturer: Sierra Wireless, Incorporated
Model: WP7609
Revision: SWI9X07Y_02.28.03.05 000000 jenkins 2019/07/08 11:04:16
IMEI: 359782080100399
IMEI SV: 6
FSN: WA803370010610
+GCAP: +CGSM

OK
at!custom?
!CUSTOM:
             GPSENABLE 0x01
             GPSLPM 0x01
             IPV6ENABLE 0x01
             UIM2ENABLE 0x01
             SIMLPM 0x01
             USBSERIALENABLE 0x01
             CSVOICEREJECT 0x02
             SINGLEAPNSWITCH 0x01
             TXONINDICATION 0x01
             HSICENABLE 0x01
             SCRUBEN 0x01
             STKUIEN 0x02
             EXTGPSLNAEN 0x01
             CSDDISABLE 0x01
             UIMAUTOSWITCH 0x01

OK
at+wiocfg?
+WIOCFG: 2,16,0,0,1,0,0
+WIOCFG: 4,16,0,0,1,0,0
+WIOCFG: 6,16,0,0,1,0,0
+WIOCFG: 7,16,0,0,1,0,0
+WIOCFG: 8,16,0,0,1,0,0
+WIOCFG: 13,16,0,0,1,0,0
+WIOCFG: 21,16,0,0,1,0,0
+WIOCFG: 22,16,0,0,1,0,0
+WIOCFG: 23,16,0,0,1,0,0
+WIOCFG: 24,16,0,0,1,0,0
+WIOCFG: 25,16,0,0,1,0,0
+WIOCFG: 28,16,0,0,1,0,0
+WIOCFG: 29,16,0,0,1,0,0
+WIOCFG: 30,16,0,0,1,0,0
+WIOCFG: 31,16,0,0,1,0,0
+WIOCFG: 32,16,0,0,1,0,0
+WIOCFG: 33,16,0,0,1,0,0
+WIOCFG: 35,16,0,0,1,0,0
+WIOCFG: 42,16,0,0,1,0,0

OK

```

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<div class="post-metadata">

**Author:** ![bruceke](https://avatars.discourse-cdn.com/v4/letter/b/0ea827/32.png) [@bruceke](https://mangoh.discourse.group/u/bruceke)\
**Post date:** [October 15, 2021, 5:32am UTC](https://mangoh.discourse.group/t/can-i-using-gpio4-for-input-in-wp7605/9714/3 "2021-10-15T05:32:59Z")

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It seems okay in R13.3 FW , thanks.