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# nRF51822 Bluetooth Low Energy Module - MDBT40-256RV3

**Type:** Product page · **SKU:** ADA4076 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/nrf51822-bluetooth-low-energy-module-mdbt40-256rv3.html ([markdown](https://core-electronics.com.au/nrf51822-bluetooth-low-energy-module-mdbt40-256rv3.html.md))

If you have a custom PCB design and you'd like to add a little Bluetooth Low Energy, this module is ultra compact and easy to use. It contains a Nordic nRF51822...

## Pricing

- **Price:** $13.80 (inc GST) — $12.55 AUD, exc GST
- **Quantity discounts:** 10+ $12.17 (exc GST) · 50+ $11.92 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 01 and Sep 07.

## How to buy

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## Description

If you have a custom PCB design and you'd like to add a little Bluetooth Low Energy, this module is ultra compact and easy to use. It contains a Nordic nRF51822 Cortex M0 chip that comes integrated with BLE radio as well as most of the supporting circuitry and even a chip antenna. The whole thing is in a tin and comes with FCC, CE and TELEC certifications.

**Please note!** **The module comes with a *blank* chip** - this is for people who are comfortable programming the chips themselves with a J-Link programmer and the Nordic SDK. Adafruit **don't** provide any firmware to go along with it!

[If you'd like to see a possible reference design for this module, check out the PCB files for Adafruit's Bluefruit UART Friend](https://github.com/adafruit/Adafruit-Bluefruit-LE-UART-Friend-PCB)

This is the same chip as the micro:bit, [so there is micropython support](https://github.com/micropython/micropython/tree/master/ports/nrf) as well as [some basic Arduino support](https://github.com/sandeepmistry/arduino-nRF5). Either way you go (SDK/micropython/Arduino) you'll still need to solder this onto a PCB and load code via a SWD programmer.

## Technical Details

- 32-bit ARM® Cortex™ M0 CPU
- Supply: 1.8V – 3.6V
- Memory: 256kB Flash Memory, 32kB SRAM
- Tx Power: +4 dBm @ 16mA
- Rx Sensitivity: -93 dBm @ 13mA
- Flexible and configurable 31 GPIO
- Interfaces: UART / I2C / SPI / PWM
- One 32 bit and two 16 bit timers with counter mode
- SPI Master / Slave
- Two-wire Master (I2C compatible)
- UART (CTS/RTS)
- CPU independent Programmable Peripheral Interconnect (PPI) . Quadrature Decoder (QDEC)
- AES HW encryption
- Real Timer Counter (RTC)
- Operating Temp: -40°C to +105°C
- Raytac's product page

Product Dimensions: 18.0mm x 10.0mm x 2.9mm / 0.7" x 0.4" x 0.1"

Product Weight: 0.9g / 0.0oz

 ![](https://core-electronics.com.au/attachments/localcontent/rohs_icon_8216055e11.jpg)- [Specification](https://core-electronics.com.au/attachments/localcontent/4076_specification_442732d1bb6.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/4/0/4076-00.jpg)