# AR7 Board - GPIO Support **URL:** \ **Category:** WP Series\ **Created:** [November 27, 2014, 3:21pm UTC](https://forum.sierrawireless.com/t/ar7-board-gpio-support/11974 "2014-11-27T15:21:25Z")\ **Posts on this page:** 1\ **Showing post:** 1
**Author:** ![mkupke](https://avatars.discourse-cdn.com/v4/letter/m/3da27b/32.png) [@mkupke](https://forum.sierrawireless.com/u/mkupke)\ **Post date:** [November 27, 2014, 3:21pm UTC](https://forum.sierrawireless.com/t/ar7-board-gpio-support/11974/1 "2014-11-27T15:21:25Z")
Hi, I tried to use the GPIOs on the AR7554 (AR7 EvalBoard) as described in the document: Accessing GPIO from Linux / AirPrime AR755x,AR865x,WP710x. First I assigned / allocated the GPIOs on the Modem (AT Interface). As you see the pins 6, 7 and 10 are assigned to function 16 = Legato / Linux: ```auto AT+WIOCFG? +WIOCFG: 1,0,0,0,1,0,0 +WIOCFG: 2,0,0,0,1,0,0 +WIOCFG: 3,0,0,0,1,0,0 +WIOCFG: 4,0,0,0,1,0,0 +WIOCFG: 5,3,0,0,1,768,0 +WIOCFG: 6,16,0,0,1,0,0 +WIOCFG: 7,16,0,0,1,0,0 +WIOCFG: 8,0,0,0,1,0,0 +WIOCFG: 9,0,0,0,1,0,0 +WIOCFG: 10,16,0,0,1,0,0 ``` Now I try to export the corresponding GPIO on Linux console to the filesystem side with the command: ```auto echo “6” > /sys/class/gpio/export ``` Independent which GPIO is used, I always get the negative response: ```auto [270.999481] The gpio6 is not supported-sh: echo: write error: Operation not permitted ``` How to declare the GPIO pin to be used from Linux side? Regards, Martin… --- _[View the full topic](https://forum.sierrawireless.com/t/ar7-board-gpio-support/11974)._