The Chirp Explorer Board, a first for data-over-sound.

The Chirp Explorer Board, a first for data-over-sound.

The Chirp Explorer Board is the first IoT prototyping platform that’s tailor-made from the ground up to explore the possibilities of acoustic data transfer.

Built around the powerful Arm Cortex-M4 CPU with inbuilt DSP for optimised audio processing, it allows developers to quickly and easily integrate data-over-sound technology into embedded scenarios. Freely-available reference designs and open-source sample applications make it easy to build a data-over-sound prototype that can be seamlessly scaled to production.

We’ve made it as quick and simple as possible to integrate with the Chirp Arm SDK, with drop-in examples to get you up and running in minutes — no need to wrestle with handling audio I/O manually.


  • Arm Cortex-M4 CPU running at 168MHz, with 256KB RAM and 2MB Flash
  • High-quality 192kHz audio DAC (Cirrus Logic CS4271) supports data-over-audio transmission in the audible and near-ultrasonic ranges, with a transmission range up to 3m
  • Integrated MEMs microphone and 1.4W dynamic loudspeaker provide integrated support for sending and receiving Chirp signals
  • Supports 3.5mm line-level inputs and outputs to connect to external audio peripherals (with optional Molex adapter)
  • User-assignable RGB LEDs, potentiometers and push buttons
  • Arduino-compatible GPIO pinout, with 21 GPIO pins, 8-channel 12-bit ADC, 2-channel 12-bit DAC, SPI, CAN, I2C, UART, and several multi-function hardware timers
  • Powered via micro-USB and programmed via standard SWD interface
  • Integrates seamlessly with the Chirp Arm SDK
  • Can also be used as a general-purpose development board for audio prototyping

The company says the Chirp Explorer Board will be shipping by the end of this year; however there’s no definitive set date or a perspective price-point. You can sign up for updates and pre-release notifications here for further information.

Please follow and like us:
Pin Share
About mixos

Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

view all posts by admin
Notify of

Inline Feedbacks
View all comments
Get new posts by email:
Get new posts by email:

Join 97,426 other subscribers