# Flashing LED **URL:** \ **Category:** Development tools\ **Created:** [September 22, 2009, 10:22am UTC](https://forum.sierrawireless.com/t/flashing-led/3655 "2009-09-22T10:22:50Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![pfoj](https://avatars.discourse-cdn.com/v4/letter/p/c67d28/32.png) [@pfoj](https://forum.sierrawireless.com/u/pfoj)\ **Post date:** [September 22, 2009, 10:22am UTC](https://forum.sierrawireless.com/t/flashing-led/3655/1 "2009-09-22T10:22:50Z")
Hi there. I am a newbie and I want to start off by flashing and LED lets say from GPIO 22. Where can I find a sample of such a simple program? Much appreciated Thanks ---
**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.sierrawireless.com/u/awneil)\ **Post date:** [September 22, 2009, 10:57am UTC](https://forum.sierrawireless.com/t/flashing-led/3655/2 "2009-09-22T10:57:07Z")
When you start-up M2MStudio, it gives you a welcome page with things like “First steps with M2MStudio” and “Discover the Open-AT Concept”. Start by exploring them… ---
**Author:** ![davidc](https://avatars.discourse-cdn.com/v4/letter/d/a183cd/32.png) [@davidc](https://forum.sierrawireless.com/u/davidc)\ **Post date:** [September 23, 2009, 12:14am UTC](https://forum.sierrawireless.com/t/flashing-led/3655/3 "2009-09-23T00:14:20Z")
Hiya, > [@pfoj](#): > > flashing and LED lets say from GPIO 22 Carefully check your GPIO voltage levels and current supply ability before directly connecting a led (or anything) to a GPIO pin. Some GPIO pins are 2.8V level, some are 1.8V - can’t remember what the current characteristics are off the top of my head. It’s a good idea at check the Product Technical Specs before going anywhere near the I/O connector! See also [this thread](http://www.wavecom.com/modules/movie/scenes/forums/viewtopic.php?f=29&t=3942&start=0) for a futher discussion… ciao, Dave