ESP32 BLE MIDI Controller Kit: Build a 12-Note Touch-Sensitive Wireless Instrument
ESP32 BLE MIDI Controller Kit: Build a 12-Note Touch-Sensitive Wireless Instrument
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine tapping a touch pad and hearing a piano note in Ableton Live, wirelessly, with zero delay. This kit turns the MPR121's 12 capacitive touch electrodes into a chromatic octave you can play into any DAW over BLE MIDI. Whether you're a music producer wanting custom hardware or a student exploring IoT-driven instruments, you'll build a real-time, low-latency MIDI controller that works straight out of the box.
What You'll Build
You'll construct a compact touch keyboard that sends precise note-on and note-off MIDI messages via Bluetooth. The MPR121 sensor detects even a light finger tap, and the ESP32 broadcasts standard MIDI over BLE, so your DAW recognizes it instantly. No extra drivers, no complex routing-just open your software, hit a pad, and play.
What You'll Learn
- Configure the ESP32 as a BLE MIDI device
- Read capacitive touch data from the MPR121 sensor over I2C
- Map 12 touch pads to musical note numbers for a chromatic scale
- Optimize touch sensitivity and debounce for real-time performance
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| MPR121 Touch Sensor | 1 |
| 4.7k? Resistors | 5 |
| 100nF Caps | 5 |
| 400-pt Breadboard | 1 |
| M-F Wires | 15 |
| Micro USB Cable | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This kit is ideal for CBSE Class 11-12 students exploring electronics and music technology, B.Tech ECE/EEE students building audio interface projects, Smart India Hackathon teams needing a rapid prototyping MIDI tool, and ATL Tinkering Labs that want a creative way to teach capacitive sensing and Bluetooth.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code in the box to chat with our AI build companion, trained on this exact project. You can also reach us on WhatsApp for human backup-usually in minutes.
Does this work with any DAW?
Yes, it emulates a standard Bluetooth MIDI controller. Works with Ableton Live, FL Studio, Logic Pro, GarageBand, and any DAW that accepts BLE MIDI input-no drivers needed.
Can I expand it to more than 12 notes?
The MPR121 supports up to 12 touch electrodes, so you can easily add an octave above or below by connecting additional touch pads. However, for two full octaves, you would need a second MPR121.
Is the touch response fast enough for real-time playing?
With proper debounce and tuning, you can achieve around 10ms latency, which is imperceptible for most playing styles. The MPR121's capacitive sensing is highly responsive.
ESP32 BLE MIDI sends note-on and note-off to a DAW. MPR121 touch pads trigger 12 chromatic notes.
What's in this kit
- ESP32 Dev Board
- MPR121 Touch Sensor
- 4.7k? Resistors x5
- 100nF Caps x5
- 400-pt Breadboard
- M-F Wires x15
- Micro USB Cable
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Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items