ESP32-S3 Dev Board
A flexible base for connected builds
MAKHEX PROJECT / 02 • AUDIO / EDGE
Offline Voice Command Node✳
Experiment with local push-to-talk and spoken status responses.
AdvancedMulti-week buildAudio
SEE THE PARTS LIST ↓ DOWNLOAD BOM CSV ↓Concept sketch · proposed build, not yet bench-verified
01 / BILL OF MATERIALS
What goes in.
Mapped component candidates. Compatibility and suppliers await validation.
COMPONENTROLEQTY
ESP32-S3 Dev Board ↗Processor01
I²S MEMS Microphone ↗Audio input01
I²S Speaker Amplifier ↗Speaker driver01
USB-C Prototyping Kit ↗Stable supply01
4 UNIQUE PART TYPES4 ITEMS
YOUR WORKBENCH / LOCAL CHECKLIST
Gather your parts.
Tick parts you already have on hand. Your progress stays in this browser—no account needed.
These are research-stage component candidates, not a verified kit. Checking a part does not establish electrical compatibility, supplier stock, or purchase eligibility.
02 / THE APPROACH
Build sequence.
- 01
Verify microphone and amplifier independently.
- 02
Check memory and firmware SDK compatibility.
- 03
Build push-to-talk with a visible recording indicator.
- 04
Benchmark a small on-device command recognizer.
- 05
Add error recovery and timeout handling.
⚑ ENGINEERING NOTE
General-purpose offline speech recognition is not practical on all ESP32 modules; verify model memory needs.
Concept-stage plan; bench validation and firmware QA pending.COMPATIBLE CANDIDATES
FULL CATALOG ↗The building blocks.
I²S MEMS Microphone
Bring sound into your prototype
I²S Speaker Amplifier
Give a voice to your device
USB-C Prototyping Kit
Start with repeatable bench power
COMMUNITY / BUILD LOG
JOIN THIS DISCUSSION ↗Build it. Break it. Share it.
Post wiring corrections, firmware fixes and what you learned building Offline Voice Command Node.
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