M5Stack PDM MEMS Microphone Unit SPM1423

M5Stack PDM MEMS Microphone Unit – Digital Microphone Module for M5Stack Projects

The M5Stack PDM MEMS Microphone Unit is a digital audio module based on the SPM1423 chip, designed for the M5Stack ecosystem. It captures voice and ambient sound accurately for DIY and IoT projects.

• MEMS microphone with PDM output for high-resolution digital audio acquisition – ideal for voice control and sound recognition
• Compatible with M5Stack Core, Stick, and Atom series via the standardised Grove connector
• Mono audio channel – optimised for voice recording and sound pattern discrimination
• Based on the proven SPM1423 chip for reliable performance in embedded applications
• Lightweight module (10 g) and compact design – easy integration into portable projects

What sets the Microphone Unit apart

Unlike simple analogue microphones, the PDM MEMS unit delivers a digital signal that can be processed directly by a microcontroller. The Grove interface enables use without soldering or additional components. Voice recordings, wake-word detection, or ambient monitoring can be implemented quickly.

Ideal for...

The unit targets developers, makers, and hobbyists seeking a compact digital microphone for M5Stack-based prototypes. Whether voice assistant, sound level meter, or interactive installation – the module provides the basis for clear audio input.

How to use the Microphone Unit

Connect the module via the Grove port to your M5Stack controller. The PDM interface is supported by the M5Stack library; example code is available in the official repository. After connection, you can start audio recording and process the data.