Wireless Bluetooth Module for your Arduino

If you’d like to wirelessly attach your Arduino to another device (such as a phone or tablet) via bluetooth, I’d recommend the serial bluetooth module from Elecrow.com.

Here is what they look like:


Serial Bluetooth Module


The module has firmware from BOLUTEK. The PDF document with all of the available BOLUTEK commands isĀ BLK-MD-BC04-B_AT COMMANDS . I also document the AT commands in the sample source code (aduino sketch) below.

There was no sample code that I could find for using these with an Arduino so I wrote my own. The following sketch (load it into any arduino) sets up the module in slave mode so you can connect to it with any blue tooth enabled device. The PIN code is 232323 as you can see from the source.



    • shawnSmith on January 28, 2015 at 9:37 pm
    • Reply

    Thanks for letting me know about this module. I’m building a Bluetooth controlled coffee machine with arduino and I’ve been looking for an easy way to connect it. but I’m having trouble choosing between all the chips out there. Have you looked at this bluetooth chipset guide ? Do you think it makes sense to maybe use an nRF51822 connected to Arduino?

    • earl on January 29, 2015 at 3:21 pm
    • Reply

    Thanks for sharing that guide. It is interesting. The nRF51822 would be a good choice too as it is supported on the arduino here for example. Besides the chip set, I’d look at how it is packaged in the ‘module’, size and price too of course.

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