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I need an small device with bluetooth that has to do the following:

  1. Have an accelerometer attached and read his data.
  2. After x seconds, send the accelerometer data to the paired device over bluetooth.

The device has to be small and portable. I've found the following ones, but I don't know if they suit well or not: Micro:bit BBC, Lilypad Simblee.

What other alternatives I have?

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The Raspberry Pi Zero W

It's $10, comes with Bluetooth LE and Wi-Fi onboard, and can be very easily set for use with an I2C sensor. Under full load it draws a only 1.2W, but has enough horses to keep pace. Best of all, it has a massive community backing it, including a StackExchange community!

The biggest drawback comes in the niche I/O choices compared to a larger board–unless you're a camera or tech geek, chances are you don't have a mini HDMI port, and you'll need to provide your own micro SD card. That said, it has a bounty compared to other similar boards like the Beetle LE or BLE Nano, and you'll probably find it easier to work with as a result.

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  • It would be possible to use it as a portable project with his own baterry and lasts for weeks?
    – user7263
    Commented Jan 18, 2018 at 9:45
  • @Lechucico Depends on the power draw of the accelerometer, but the board itself on a fairly generous 20000 mAh battery bank should do just about a week.
    – JMY1000 ♦
    Commented Jan 18, 2018 at 9:49
  • Do you know more devices for portable solutions?
    – user7263
    Commented Jan 18, 2018 at 9:59
  • Besides the other two I listed, it seems to pretty much be breakout boards. There's fatter boards for sure, but that seems in conflict with your goals.
    – JMY1000 ♦
    Commented Jan 18, 2018 at 10:03

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