I2S MEMS Microphone Breakout Board

The DFRobot Fermion I2S MEMS microphone is a digital microphone on a small board. It picks up sound from all directions and outputs the data directly via I2S, so no analog-to-digital converter is needed on the microcontroller. The SEL pin selects whether the microphone sends in the left or right channel, so two microphones can be operated on one I2S interface. The module runs on 3.3 V and suits ESP32 boards well; DFRobot provides examples for the FireBeetle ESP32-E.

Recommended Accessories:

• FireBeetle 2 Board ESP32-E

Features:

• Digital MEMS microphone with I2S output
• Omnidirectional, picks up from all directions
• Maximum sound pressure level 140 dB
• Signal-to-noise ratio 59 dB
• Channel selection left or right via SEL
• Operation at 3.3 V
• Arduino library DFRobot_MSM261 with examples for ESP32

Application Examples:

• Voice control and speech recognition
• Audio recording to a microSD card
• Sound detection and machine monitoring
• Audio transmission in IoT devices

Documentation:

• DFRobot Wiki SEN0526
• Arduino library DFRobot_MSM261 on GitHub
• Datasheet (PDF)
• Schematic (PDF)
• Example: recording as WAV file with ESP32 (DFRobot Wiki)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0526
• Operating voltage: 3.3 V DC
• Type: MEMS
• Directivity: omnidirectional
• Data output: I2S
• Maximum sound pressure level: 140 dB
• Signal-to-noise ratio: 59 dB
• Connections: 3V3, GND, SCK (clock), WS (word select), DO (data), SEL (channel: low left, high right)
• Dimensions: 11 × 16 × 4 mm
• Weight: 6 g

Scope of Delivery:

• 1× Fermion I2S MEMS microphone
• 1× pin header 6-pin