# quarter sized bluetooth single LED module

**URL:** <https://community.sparkfun.com/t/quarter-sized-bluetooth-single-led-module/38027>\
**Category:** E-textiles\
**Created:** [October 21, 2019, 5:02pm UTC](https://community.sparkfun.com/t/quarter-sized-bluetooth-single-led-module/38027 "2019-10-21T17:02:37Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mryave](https://avatars.discourse-cdn.com/v4/letter/m/c57346/32.png) [@mryave](https://community.sparkfun.com/u/mryave)\
**Post date:** [October 21, 2019, 5:02pm UTC](https://community.sparkfun.com/t/quarter-sized-bluetooth-single-led-module/38027/1 "2019-10-21T17:02:37Z")

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Hi!

been looking for the smallest possible configuration of sparkfun pieces for 1) tiny battery module that powers 2) bluetooth receiver that with a very small bit of code can 3) turn on an led module.

Looks like the lily pad has some individual components like (1)[DEV-13883] and (3)[DEV-13735], but the bluetooth receiver as well as central controller for processing i/o and executing code are a little difficult to find. not sure what the difference DEV-13264 and DEV-13883.

any advice or feedback is appreciated. height of the overall thing im trying to make isn’t an issue, but it ideally wouldn’t be wider than a quarter.

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**Author:** ![El\_Duderino](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/el_duderino/32/6367_2.png) [@El\_Duderino](https://community.sparkfun.com/u/El_Duderino)\
**Post date:** [October 24, 2019, 6:18pm UTC](https://community.sparkfun.com/t/quarter-sized-bluetooth-single-led-module/38027/2 "2019-10-24T18:18:38Z")

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Hi mryave,

I am not sure we are going to have a microcontroller that will have those specifications and size requirements. The closest options we have would be the [[SparkFun Edge 2](https://www.sparkfun.com/products/15420) or an XBee3 Module like [[this](https://www.sparkfun.com/products/15126). The Edge 2 will be more of your conventional development board and has BLE capabilities with I/O pins broken out to control an LED. The XBee3 modules are a bit different since they are typically embedded into a larger system but you can program them as a microcontroller.

Both boards require a USB to Serial interface to interact with a computer to upload code or monitor output. The Edge 2 has a 6-pin FTDI header on board to easily connect a [[3.3V FTDI Basic Breakout](https://www.sparkfun.com/products/9873) or a [[Serial Basic Breakout](https://www.sparkfun.com/products/15096). For the XBee, we have a few different boards that allow you to plug in an XBee module and create a USB to Serial bridge called XBee Explorers. You can take a look at all of our XBee Explorers and other XBee products in our [[XBee Category](https://www.sparkfun.com/categories/111). To get started with either of these boards, I would recommend taking a look through the various resources we have linked in the “Documents” tabs on their respective product pages.

I hope this helps you find the right parts for this project. If you have any follow-up questions about these or other SparkFun products you would like to use for this project, let us know and we would be happy to help as much as we can.]([XBee - SparkFun Electronics](https://www.sparkfun.com/categories/111))]([SparkFun Serial Basic Breakout - CH340C and USB-C - DEV-15096 - SparkFun Electronics](https://www.sparkfun.com/products/15096))]([https://www.sparkfun.com/products/9873](https://www.sparkfun.com/products/9873))]([XBee 3 Module - PCB Antenna - WRL-15126 - SparkFun Electronics](https://www.sparkfun.com/products/15126))]([SparkFun Edge 2 Development Board - Artemis - DEV-15420 - SparkFun Electronics](https://www.sparkfun.com/products/15420))