What is hackaBLE ?

hackaBLE is a tiny (~ 18 mm x 28 mm) Open Source Nordic nRF52832 based BLE development board you can embed in your BLE projects. It's designed such that you can use it in three ways:

  • On a breadboard
  • On a custom PCB, hand-soldered easily using the castellated 2.54 mm pitch headers
  • On a custom PCB, using a stencil and oven, making use of extra pads underneath the PCB

hackaBLE uses offers more value than just using the BLE module directly - since it incorporates the necessary passive components - including the ones for the buck converter for power saving - and adds an RGB LED and a button for convenience. It's also much easier to solder than the bare modules.

Purchasing information

hackaBLE is available for purchase from our Tindie store. Please email us at info@electronut.in if you have any questions.


  • Raytac MDBT42 based on Nordic Semiconductor's nRF52832 SOC with chip antenna
  • Button user configurable, set as RESET by default
  • SWD programming headers
  • MCP1702 3.3 V LDO
  • Reverse current protection.

Currently, there are two versions available in the market. Select your version of hackaBLE from below and follow the documentation.

hackaBLE v0.3

hackaBLEv0.3 thumbnail

NOTE: There are a couple of issues in production run of v0.3 batch:

  • Only Red and Green LEDs are usable, not blue (LED rotated 90 degrees). To make it work, please see section v0.3 LED workaround.

  • Second issue, is that the castellated edges in our design were ignored by the manufacturer, and we got edge cuts on the PCB, which broke off connection to P0.8 on the header. There is no easy workaround for this.

hackaBLE v2.2

hackaBLEv0.3 thumbnail

hackaBLE v0.3


This is the latest version of hackaBLE it uses Raytac's nRF52832 module by Nordic Semiconductors. This version uses MCP1702, a 3.3 V voltage and protection diode at the input which enables hackaBLE to consume very low current and also provides reverse current protection. It also comes with an RGB LED, user reset button and SWD programming headers.

hackaBLE v0.3 pinout


hackaBLE v0.3 PCB Footprint


hackaBLE v0.3 Schematic

hackaBLE v2.2


hackaBLE v2.2 is a redesigned hackaBLE that used the BLE SoC directly rather than a module. This version of hackaBLE also comes with an RGB LED, button, and SWD programming headers. It has onboard BLE antenna.

[CAUTION] hackaBLE v2.2 does not come with a regulator since it's designed for low power applications. MAX input to VDD is 3.6 V.

hackaBLE v2.2 pinout


Schematic for hackaBLE v2.2

Programming hackaBLE

hackaBLE uses the Nordic nRF52832 which in turn is based on an ARM Cortex-M4 core. So you can really program it with any ARM compatible programmer. We do have a convenient solution though, in the form of our Bumpy Blackmagic probe compatible SWD debugger and our PogoProg.



As shown above, use the four SWD pins of PogoProg on hackaBLE to upload or debug hackaBLE.

Please read the bumpy documentation on using Bumpy to program hackaBLE.

For more details on nRF52 programming, please read our guide on getting started with Nordic nRF5 SDK.

Program using Arduino IDE

hackable does not ship with a bootloader, but it is supported in Arduino. Please visit here for details (but select Hackable in the board's menu).

Here's a blog article which will help you create a BLE custom characteristic and program it to hackaBLE using Arduino IDE.

For more detailed programming guide go here

RGB LED issue workaround for v0.3

Due to an omission in our production test, we missed specifying which LED lights up with the production test firmware, so our manufacturing partners and us missed an issue with the RGB LED part placement, and it is rotated by 90 degrees.

Due to the rotation, only two LEDs are going to work, the Red and the Green one.

Here's some pseudo code which tells exactly what needs to be done:

// this sets the common pin of the two working LEDs high

// for turning on red LED (active low)

// for turning on green LED (active low)

If you are using the latest arduino package from us, this is already done for you, and your application can directly do:

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(PIN_LEDR, OUTPUT);
  pinMode(PIN_LEDG, OUTPUT);

// the loop function runs over and over again forever
void loop() {
  digitalWrite(PIN_LEDR, LOW);     // red on
  digitalWrite(PIN_LEDR, HIGH);    // red off
  digitalWrite(PIN_LEDG, LOW);     // green on
  digitalWrite(PIN_LEDG, HIGH);    // green off

Soldering headers hackaBLE

hackaBLE can be used on a breadboard. Here's a video that shows how to solder headers on to hackaBLE:

Code Repository

You can find all code and design files related to HackaBLE in this repository.

About Electronut Labs

Electronut Labs is an Embedded Systems company based in Bangalore, India. More information at our website.