Contact person: Voice-Activated ESP32 Entertainment Controller

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Location: London, United Kingdom

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"Project Overview
We are seeking a skilled and reliable IoT Developer to design, build, and deliver a compact voice-activated device using the ESP32 module. The device will support WiFi connectivity, audio recording, and mode switching via physical buttons and LED indicators. Firmware must integrate with a web portal for voice user selection, using API details we will provide.

Key Responsibilities
• Hardware Design & Assembly
• Select and configure ESP32 module with WiFi
• Integrate 2 physical buttons:
• POWER – Device on/off
• RECORD – Toggle between Command and Dictation modes
• Install 1 RGB LED for status indication
• Connect microphone and speaker for audio input/output
• Design and build a basic enclosure for the device

Firmware Development
• Implement mode switching logic (Command vs Dictation)
• Enable audio recording and upload functionality
• Integrate voice user selection via web portal (API details provided)
• Ensure WiFi connectivity to external app
• Include basic error handling and fallback mechanisms
• Testing & Delivery
• Conduct functional testing and debugging
• Ship the final working device to a UK address
• Provide documentation for setup and usage

Required Skills & Experience
• Proven experience with ESP32, Arduino, or similar microcontroller platforms
• Strong knowledge of embedded C/C++, MicroPython, or ESP-IDF
• Familiarity with audio processing, WiFi protocols, and IoT firmware
• Experience integrating microphone/speaker modules and LED indicators
• Ability to build compact enclosures (3D printing or off-the-shelf casing)
• Comfortable working with REST APIs and web portal integrations
• Clear communication and milestone-based delivery

What We Provide
• API documentation and endpoint access for voice user selection

Payment in 3 milestones:
Upon initial development
After successful remote testing
Upon receipt of the device in the UK
Reimbursement for hardware costs/shipping (you may purchase your own components)" (client-provided description)