Loading...

GY-SPH0645LM4H MEMS Microphone Digital Sound Sensor Module I2S Interface

Rating:
89%
₹479.00 ₹ 405.93 + 73.07 GST
In stock
SKU
PRO4865

1-3 Days Express Shipping in India Available

Bulk Pricing
QTYUnit Price(Inlc. GST)
10+ ₹469.42 ₹ 397.81 + 71.61 GST
15+ ₹464.63 ₹ 393.75 + 70.88 GST
20+ ₹459.84 ₹ 389.69 + 70.14 GST
25+ ₹455.05 ₹ 385.64 + 69.42 GST

Contact us for Higher Quantities.

Contact us for Higher Quantities

High-precision I2S digital microphone for crystal-clear audio recording. Bypasses noisy analog inputs. Perfect for voice assistants and audio analysis.

Stop feeding your microcontroller noisy audio. If you are trying to build a voice assistant or an audio spectrum analyzer using a standard analogue microphone, you know the pain: static, hiss, and poor sensitivity. The GY-SPH0645LM4H MEMS Microphone solves this by going 100% Digital. Instead of outputting a voltage that picks up noise from your wires, it outputs pure digital audio data via the I2S (Inter-IC Sound) interface. This means the audio signal remains pristine from the microphone chip all the way to your processor.

The Probots Quality Advantage MEMS microphones are tiny technological marvels, but they are fragile. A crushed port means muted audio. We package every SPH0645 in Probots™ Secure-Transit anti-static foam to ensure the delicate acoustic port remains unblocked and undamaged. We also verify the PCB layout to ensure the "Select" pin is correctly pulled low/high, preventing the "channel swapping" bugs common in cheaper clones.

Specifications

  • Interface: I2S (Digital Audio).

  • Sensor Type: MEMS (Micro-Electro-Mechanical Systems).

  • Operating Voltage: 3.3V DC (NOT 5V compatible).

  • Frequency Response: 50Hz – 15kHz (Wideband).

  • Sensitivity: -26 dBFS.

  • S/N Ratio: 65dB (Very low noise floor).

  • Data Format: 24-bit I2S data frames.

  • Dimensions: Tiny! ~15mm x 15mm.

Compatibility & Platform Support

  • ESP32:Perfect Match. The ESP32 has hardware I2S support. This is the #1 choice for Wi-Fi walkie-talkies or streaming radios.

  • Raspberry Pi (Zero/3/4/5): Excellent. The Pi has a dedicated I2S bus on the GPIO header. You can configure this as a system-level sound card (ALSA device).

  • Arduino Uno/Nano: Not Compatible. Standard 8-bit Arduinos are too slow and lack the I2S interface to handle this data stream.

  • Teensy / STM32:Compatible (Requires specific I2S libraries).

Key Applications & Projects

  • DIY Smart Speaker: Build your own privacy-focused version of Alexa or Google Home using a Raspberry Pi.

  • Audio Visualizer: Create a real-time LED music visualizer that reacts to specific frequencies (Bass/Treble) with high precision.

  • Environmental Monitor: Detect specific sounds (like glass breaking or a baby crying) using Machine Learning on the Edge (TinyML).

  • Voice Recorder: Build a high-fidelity dictaphone.

Unlock New Capabilities (Project Evolution)

  • Prerequisites: You must be comfortable with installing libraries (I2S for ESP32) or editing config files (/boot/config.txt on Raspberry Pi).

  • The Upgrade: Stereo Recording!

  • The Logic: The module has a SEL (Select) pin. Connect one mic's SEL to GND (Left Channel) and another mic's SEL to 3.3V (Right Channel). Wire them to the same I2S bus, and boom—you have True Stereo Recording for spatial audio projects.

Virtual Technician: Wiring & Safety ⚠️

  • 3V: Connect to 3.3V. DO NOT connect to 5V; it will fry the MEMS chip instantly.

  • GND: Connect to Ground.

  • BCLK: Bit Clock (Connect to SCK/BCLK pin).

  • DOUT: Data Out (Connect to SD/DIN pin).

  • LRCL: Left/Right Clock (Connect to WS/Word Select pin).

  • SEL: Channel Select. Leave unconnected for Mono/Left. Connect to 3.3V for Right channel.

Accessories

  • Included in the Package:

    • 1 x GY-SPH0645LM4H Module

    • 1 x Header Pin Strip (Unsoldered)

  • Required Accessories:

    • Controller: ESP32 or Raspberry Pi.

    • Wires: Female-to-Male Jumper Wires.

Helpful Tutorials & Resources

Frequently Asked Questions (FAQ)

  1. Is this better than the blue "Sound Sensor" with the potentiometer?

    Yes, infinitely better. The blue ones only detect "Loudness" (Clap ON/OFF). This module records actual high-fidelity audio like a phone microphone.

  2. Can I plug this into a standard AUX/Headphone jack?

    No. This outputs digital 1s and 0s (I2S data), not analog voltage. It cannot directly drive a speaker or amplifier input.

  3. Does it work with Arduino Uno or Nano?

    No. The ATMega328 chip on the Uno is too slow and lacks the hardware I2S interface required to read the data stream.

  4. Why is the volume so low on my Raspberry Pi recordings?

    Digital mics often have "DC Offset" or scaling issues in raw capture. You usually need to apply a "SoftVol" (Software Volume) plugin in your .asoundrc config to boost the gain digitally.

  5. Is it waterproof?

    No. The tiny hole on top is the acoustic port. If water, oil, or flux gets in there, the mic is permanently damaged.

  6. What is the effective pickup range?

    It can pick up normal conversation clearly from 2-3 meters away in a quiet room. It is quite sensitive.

  7. Does it have hardware noise cancellation?

    No, it records raw audio. However, because the signal is digital and clean (no wire noise), it is much easier to apply software noise reduction later.

  8. Can I use two of these at once for Stereo?

    Yes! Connect the SEL pin to GND on the first mic (Left Channel) and to 3.3V on the second mic (Right Channel). Wire them to the same I2S pins.

  9. What sampling rates does it support?

    It typically works well at standard audio rates: 16kHz, 32kHz, and 44.1kHz.

  10. Is this the same as the INMP441?

    They are very similar I2S mics. The SPH0645 is often preferred for Raspberry Pi because it has slightly better driver support in standard Linux kernels, but functionally they are interchangeable for most projects.

  11. Can I use 5V logic from an Arduino Mega?

    No! The logic levels must be 3.3V. Using 5V on the data pins or power pin will destroy the MEMS chip.

  12. Why do I hear a "Pop" sound when recording starts?

    I2S mics need a few milliseconds to wake up and stabilize their data stream. It's common practice to discard the first few samples in your code to avoid this "pop."

  13. How long can the wires be?

    I2S is a high-speed digital protocol. Keep wires short—ideally under 10cm-15cm. Long wires introduce capacitance that corrupts the data, causing "clicking" sounds.

  14. Does it work with Jetson Nano?

    Yes, the Jetson Nano GPIO header supports I2S, similar to the Raspberry Pi.

  15. What is "DC Offset" and do I need to fix it?

    The SPH0645 output is sometimes not centered at 0. This can make the audio waveform look shifted. Simple audio processing software (like Audacity or Python code) can remove this offset easily.

  16. Can I use this for FFT (Fast Fourier Transform) visualization?

    Yes, this is the perfect sensor for that. Its clean digital signal allows for very accurate frequency analysis for music reactive LEDs.

  17. How do I clean the sensor if it gets dusty?

    Do not use liquid cleaners or compressed air directly into the port! You can gently brush off the PCB, but avoid the port hole.

  18. What is the LRCL pin for?

    "Left/Right Clock" (also called WS or Word Select). It tells the sensor whether the current data bit belongs to the Left channel or the Right channel.

  19. Does it need a driver on Raspberry Pi?

    Yes, it usually requires enabling the I2S overlay in /boot/config.txt. The generic rpi-i2s-audio or googlevoicehat-soundcard overlays often work.

  20. Is the output PCM or PDM?

    It is PCM (Pulse Code Modulation) over I2S. It is not PDM (Pulse Density Modulation), so you don't need a decimation filter—the data is ready to use.

More Information
Technical Details

 

Dimensions

Dimensions

Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account

How to Order?

Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in

  • Place an order online our website probots.co.in for quick and fast delivery
  • You can contact us by phone, Whatsapp or Mail for bulk enquiries, technical queries or order related enquiries before placing the order.
  • If you require a Quotation or PI for your company, send us a request mail and we will help you with it.

Delivery Time?

We delivery electronics components and parts throughout India using standard couriers like Bluedart, Delhivery & India Post.

  • Dispatch Time: 1 Working Day for most orders
  • Guranteed Delivery Time: 1-3 days within India under Express Shipping

How to buy Electronics Components in Bangalore?

  • We offer store pickups for walkin customers in Bangalore. This is the fastest way to get electronic components in Bangalore.
  • Customers can visit our store to buy parts directly
  • Alternatively, you can place orders online and select Select Pickup as the delivery option and have your order picked up by Dunzo, Porter, etc. Please contact us for confirmation before arranging a pickup.

Need Help?

For order related queries contact -

Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in

We offer specialized services for Bulk, Wholesale & B2B Customers like discounted prices, additional shipping options, customised products, etc . Customer with large quantity & regular orders qualify for the specialised discounted rates.

We also offer dedicated sales team to assist you with the order process by providing sales quotations, PI, technical support for choosing products, etc.

Note: Business Orders are processed manually and usually take 1-3 days  to process compared to placing the order directly on our website. Please plan your purchases accordingly.

Need Help?
For bulk enquiries contact us by  -

Customer also viewed

3V Litium Battery Holder
3V Litium Battery Holder
Rating:
92%
₹25.00 ₹ 21.19 + 3.81 GST
Rocker Switch On Off SPST 2 Pin KCD1-101
Rocker Switch On Off SPST 2 Pin KCD1-101
Rating:
91%
₹15.00 ₹ 12.71 + 2.29 GST
MCP23017 IO Expander Serial Module I2C Serial Interface 16 bit
MCP23017 IO Expander Serial Module I2C Serial Interface 16 bit
Rating:
89%
₹399.00 ₹ 338.14 + 60.87 GST
Raspberry Pi Zero W
Raspberry Pi Zero W
Rating:
90%
₹1,999.00 ₹ 1694.07 + 304.93 GST
 4070 - 4 Ohm 3W Rectangular Speaker Full Range Audio Driver for Arduino & DIY
4070 - 4 Ohm 3W Rectangular Speaker Full Range Audio Driver for Arduino & DIY
Rating:
88%
₹249.00 ₹ 211.02 + 37.98 GST
Max98357 I2S 3W Class D Amplifier Module For Raspberry Pi Esp32
Max98357 I2S 3W Class D Amplifier Module For Raspberry Pi Esp32
Rating:
89%
₹269.00 ₹ 227.97 + 41.03 GST
SPST ON-OFF Round Rocker Switch 6A,250V AC
SPST ON-OFF Round Rocker Switch 6A,250V AC
Rating:
89%
₹69.00 ₹ 58.47 + 10.52 GST
Raspberry Pi Pico W
Raspberry Pi Pico W
Rating:
88%
₹759.00 ₹ 643.22 + 115.78 GST
2.5 Inch speaker
2.5 Inch speaker
Rating:
89%
₹83.00 ₹ 70.34 + 12.66 GST
PEM318 CircuitX Surface Mount Plastic Enclosure - Medium
PEM318 CircuitX Surface Mount Plastic Enclosure - Medium
₹69.00 ₹ 58.47 + 10.52 GST

Related Products

Similar Products in this Category

10Mohm  - 1/4 W Resistor
10Mohm - 1/4 W Resistor
Rating:
92%
₹3.00 ₹ 2.54 + 0.46 GST
19mm ProMax PPS19024GPL Metal Push Button Switch Waterproof  Latching 12V-24V Green
19mm ProMax PPS19024GPL Metal Push Button Switch Waterproof Latching 12V-24V Green
Rating:
87%
₹349.00 ₹ 295.76 + 53.24 GST
OF05ZAT Liquid Flow Sensor - G1/2 DN15 for Milk, Gasoline, Oil, and Diesel
OF05ZAT Liquid Flow Sensor - G1/2 DN15 for Milk, Gasoline, Oil, and Diesel
Rating:
91%
₹2,199.00 ₹ 1863.56 + 335.44 GST
ProMax Indicator Panel Mount LED for Signal Indication 3 - 6V, Red
ProMax Indicator Panel Mount LED for Signal Indication 3 - 6V, Red
Rating:
91%
₹235.00 ₹ 199.15 + 35.85 GST
39ohm - 1/4 W Resistor
39ohm - 1/4 W Resistor
Rating:
88%
₹3.00 ₹ 2.54 + 0.46 GST
LockIT LMS100-01 Magnetic Sensor for Door NC
LockIT LMS100-01 Magnetic Sensor for Door NC
₹699.00 ₹ 592.37 + 106.63 GST
27pF 50V Ceramic Capacitor
27pF 50V Ceramic Capacitor
Rating:
92%
₹3.00 ₹ 2.54 + 0.46 GST
Lilypad ATmega328P Main Development Board For eTextiles & Wearables
Lilypad ATmega328P Main Development Board For eTextiles & Wearables
Rating:
92%
₹449.00 ₹ 380.51 + 68.49 GST
560pF 50V Ceramic Capacitor
560pF 50V Ceramic Capacitor
Rating:
89%
₹3.00 ₹ 2.54 + 0.46 GST
L&T Larsen & Toubro MNX 12 Power Contactors 220-240V AC, 3 Pole
L&T Larsen & Toubro MNX 12 Power Contactors 220-240V AC, 3 Pole
Rating:
97%
₹1,499.00 ₹ 1270.34 + 228.66 GST

You may also be interested in

Bestselling Products

Popular Category Products

New Products

PROBOTS - ABOUT US

Probots offers Electronics Engineering Services to get your product from concept to production. We provide the following services - Circuit Designing, PCB Designing, Embedded Firmware Development, etc. We have successfully designed 100+ products in IoT, AI & ML, Automation, Robotics, Industrial Monitoring, Generic Consumer Devices, and Medical Devices.

We help customers build their own design and prototypes by supplying electronic parts. We stock a wide range of parts that we use for manufacturing products. These products are carefully sourced from best manufacturers at bulk pricings and we pass on the benefits to our customers. We sell Arduino, Raspberry Pi, IoT Sensors, ESP32, STM32 Development Boards, Electronic Components, Prototyping Tools and Robotics Parts.

Buy Arduino, Raspberry Pi, NodeMCU ESP32, Electronic Components, Plastic Enclosures and much more at Probots - India’s Largest Engineering and DIY Store

As one of India’s biggest distributors of electronic and technological components for the Embedded Systems and Robotics, we offer more than 110,000 products at a unique price-performance ratio, with maximum availability and minimum delivery times. With our broad spectrum of electronic components we are the ideal partner for component purchasing. In our online shop electronics engineers will find ICs and microcontrollers, as well as LEDs and transistors. We also offer resistors, capacitors, and pin-and-socket connectors and relays. We have the right equipment for your workplace, including soldering stations and multimeters as well as and high-quality tools. In addition, our product spectrum includes a large selection of items from plastic enclosures accessories and HDMI cables, batteries and rechargeable batteries. Have a look at our large selection of accessories. When it comes to and as well as connectors and memory cards our emphasis is on top quality at very attractive prices. Try out our fast dispatch service and top customer support, and compare our prices: We are certain that you will soon be among our satisfied customers.

WHERE TO BUY ELECTRONIC COMPONENTS ONLINE IN INDIA?

Probots sells the following items online - Arduino, Raspberry Pi Development Boards, NodeMCU ESP8266, ESP32, Sensors Modules, Electronic Components, Plastic Enclosures for Electronics, SMPS Power Suppliers, Resistors, Capacitors, and a wide range of products. You can order online on our website and we will deliver throughout India within 1-15 days.

ONLINE SHOPPING MADE EASY AT PROBOTS

If you would like to experience the best of online shopping for Electronic Modules & Components in India, you are at the right place. Probots is the ultimate destination for Electronics & Robotics, being host to a wide array of merchandise including Arduino, Raspberry Pi, NodeMCU ESP32, Sensors, Motor Drivers, Power Suppliers, SMPS, Batteries, Electronic Components, etc. You can get every part for your next project online and stop worrying about sourcing components from multiple sources. We sell products only after careful selection among multiple vendors. You can shop online at Probots from the comfort of your home and get your favourites delivered right to your doorstep.

BEST ONLINE SHOPPING SITE IN INDIA FOR ELECTRONICS & ROBOTICS

Irrespective of your project - IoT, Robotics, Python, OpenCV, AI, ML, Embedded Electronics, Automation, etc you will find all required components at probots.co.in. You will realise that the sky is the limit when it comes to the parts used in these projects and you can purchase them online on our store.

  • Plastic Enclosures
  • Electronic Modules
  • Electronics Components
  • Tools & Prototyping
  • Robotics 

BUY PLASTIC ENCLOSURES FOR ELECTRONICS IN INDIA

Probots manufactures and retails 100+plastic boxes and cases for electronic circuits. No minimum order quantity, bulk discounts available for business purchase. We make enclosures boxes for sensor nodes, controllers, IoT Products, handheld devices, wearables, wall mount devices, etc. 

Probots sells generic low cost effect enclosures, high quality premium IP65 Dust and Waterproof Enclosures, Enclosures with Transparent Lids, etc We have circuit enclosures boxes for all sizes - small, medium and large PCB boards. We also have Aluminium Enclosures, ABS enclosures, PVC Enclosures, Cabinets, Metal Boxes, etc. We also sell IP65 Waterproof PVC & Metal Cable Glands and Fan Filters

BUY Arduino Board Online India

Probots sells Arduino UNO, Arduino Mega, Arduino Nano, Arduino Pro, Mini, Micro, Lilypad, Due, and other development boards online in India. These boards come with Atmega328 and Atmega2560 and are great for learning electronics and programming. Order them online for your next robotics, electronic, IoT Project.


BUY Raspberry Pi Online India

Probots sells Raspberry Pi, Pico SBC (Single Board Computer), HDMI Displays, Raspberry Pi Starter Kit. We source them from official Distributors and offer the best quality development boards at lowest prices possible. We also sell a wide range of Raspberry Pi Accesories - Raspberry Pi Cameras & Lens, Heat sink Cases for Raspberry Pi, Raspberry Pi Sensors, Raspberry PI Power supplies, etc. Buy Raspberry Pi Online Now for your next Machine Vision Project, OpenCV Project, Image processing and recognition project!

Electronic Sensor Modules Online at Probots India

Buy Online Ultrasonic Sensors, Distance Sensors, Temperature Sensors, PIR Motion Sensors, ph Soil Sensors, Encoder Sensors, Magnetic Door Lock Sensors, Gas Sensors, Accelerometers & IMU Modules, Line Following Sensors, Force Flex Sensors, Current and Voltage Sensors, Flow Sensors, Light Sensors, Biometric Fingerprint Sensors, etc. We also have the latest electronic sensors for electronics and robotics like sound and voice sensors,  Gesture Recognition SEnsors, Load Cell Weight Sensors, etc. These sensors can be used with Arduino, Raspberry Pi, NodeMCU, ESP32 and other microcontrollers. Use them in your next electronics project. Order them online now.

Best Online Store for buying Electronic Components

Bits and pieces that make your project work are always hard to find. Probots has 500+ electronic components like Microcontroller ICs, LEDs, Header Pins, Connectors, Crystal Oscillators, Cables, Buzzers, Transistors, Motor Driver ICs,

Voltage Regulator ICs, ZIF & DIP Sockets, LED Holders, Switches, Potentiometers, LCD Displays, ICs, Resistors, Batteries & Holders, Heatsinks, Capacitors, Relays, Diodes, Heat shrink tubes, LED Displays, DIP Switches, Resistor Arrays, 7 Segment Displays, LED Strips, etc Chekout our wide range of electronic components and order them online in India now.

AFFORDABLE PARTS AT YOUR FINGERTIPS
Probots is one of the unique online electronics shopping sites in India where components are accessible to all. Check out our new arrivals to view the latest microcontrollers, sensors and ICs in the market. 

HISTORY OF PROBOTS
Becoming India’s no. 1 electronics destination is not an easy feat. Sincere efforts, digital enhancements and a team of dedicated personnel with an equally loyal customer base have made Proobts the onlie platform that it is today. The original B2C venture for electronics components was conceived in 2009 but transitioned into a full-fledged ecommerce giant within a span of just a few years. By 2012, Probots introduced 350 Indian and international brands to its platform, and this has only grown in number each passing year. Today Probots sits on top of the online electronics field with an astounding social media following, a loyalty program dedicated to its customers, and tempting, hard-to-say-no-to deals.

Probots Techno Solutions offers complete turn-key Embedded Electronics Design & Engineering Services. We can work on Product Specification through Prototyping, Proof of Concept to Production depending on individual client needs. 

Probots is one of the top Electronics Design companies based out of Bangalore. We provide range of Embedded Engineering Services that include Circuit Designing, PCB Designing, Customised IoT Hardware, Embedded Firmware Development, Hardware Prototyping, Proof of Concepts & Electronic Manufacturing Services.

With close to 10 years of solid experience in Electronics Design, we have successfully completed 100s of complex Electronic Product Designs across a wide range of domains - Consumer Products, Industrial, Medical and Aerospace Industries. Our team has completed projects for Fortune 500 companies as well as start-ups using both traditional and cutting edge technologies. 

Probots also offers consultancy, and testing services across the product and process development life cycle. 

Our biggest strength is our agile team that utilises our core experience, to deliver quick turnarounds giving you faster time-to-market.

Probots Store Reviews

4.6
8 Reviews
5 ★
500
4 ★
56
3 ★
25
2 ★
12
1 ★
29
5.0
Delivery
5.0
Quality
4.7
Products
Value: Great
Value

What Our Customers Say

Probots Electronics is highly regarded for its great selection of components and professional service. Customers frequently praise the awesome care and timely delivery provided by the team to ensure all products arrive safely.

Most relevant
Newest
Highest rating
Write a Review
📌 Showing reviews about:
No reviews found for this category. Show all reviews
Nischith shetty

Friendly staff but Too costly, price is 2x as compared to SP road.

Rajeev Ranjan Pandey

Worst experience. UPI payment of Rupee 1,609 was successfully debited, but the order was later cancelled and no refund was issued.

Varshaa Senthil kumar

The products were at reasonable cost and the service and care provided by the whole team to deliver it safe was really awesome.

Soma Dasgupta

Great selection of components. Highly recommended for electronics enthusiasts!

SANTHA KUMAR

Happy with my purchase from ProBots. Some components are slightly expensive compared to other stores, but many items are reasonably priced. Good support and service.

Arun R

Good store for IoT components. Prices could be better though.

Manoj K

Best place to buy electrical components. A bit pricey but worth it for the quality.

G C Electronics Jaipur

Good products - Timely delivery. Professional service.

Nischith shetty

Friendly staff but Too costly, price is 2x as compared to SP road.

Rajeev Ranjan Pandey

Worst experience. UPI payment of Rupee 1,609 was successfully debited, but the order was later cancelled and no refund was issued.

Varshaa Senthil kumar

The products were at reasonable cost and the service and care provided by the whole team to deliver it safe was really awesome.

Soma Dasgupta

Great selection of components. Highly recommended for electronics enthusiasts!

SANTHA KUMAR

Happy with my purchase from ProBots. Some components are slightly expensive compared to other stores, but many items are reasonably priced. Good support and service.

Arun R

Good store for IoT components. Prices could be better though.

Manoj K

Best place to buy electrical components. A bit pricey but worth it for the quality.

G C Electronics Jaipur

Good products - Timely delivery. Professional service.

Copyright © 2025-present Probots, Inc. All rights reserved.