BAYANI: Educational Children's Audio Box Firmware
Budget: €250 – €750 EUR
# ESP32 NFC Audio Player Firmware Development (Children's Audio Box)
## Project Overview
We are developing BAYANI, a screen-free educational audio box for children inspired by products such as Toniebox.
The hardware platform already exists and includes:
* ESP32
* NFC reader (PN532 or compatible)
* MicroSD card
* Audio DAC (I2S)
* Audio amplifier
* 3 control buttons
* LED indicators
* Li-Ion battery
* USB-C connection
At this stage, we are looking for an experienced embedded firmware developer to create the V1 firmware.
---
## Firmware Features Required
### NFC Figurine Detection
* Detect NFC figurine placement
* Read NFC UID
* Associate UID with audio content
* Start playback automatically when a figurine is placed
### Playback Control
* MP3 playback from microSD card
* Play / Pause
* Previous / Next track
* Volume control
* Smooth audio behavior
### Figurine Removal
* Immediate pause when figurine is removed
* Save playback position
* Resume from last position when figurine is placed again
### Button Management
* Play / Pause button
* Volume Up
* Volume Down
* Long press functions if needed
### LED Management
* Playback status
* Charging status
* Battery indication
* Error indication
### Battery Management
* Battery level monitoring
* Low battery warning
* Charging detection
### USB Mass Storage Mode
* Device appears as USB storage when connected to a computer
* Easy audio content management
* No dedicated application required
---
## Deliverables
* Fully documented firmware source code
* Build instructions
* Firmware architecture explanation
* Demonstration video
* Tested firmware running on hardware (or equivalent validated setup)
---
## Required Skills
* ESP32
* Embedded C / C++
* NFC (PN532 preferred)
* I2S Audio
* MicroSD file systems
* USB Mass Storage
* Battery-powered devices
* Consumer electronics products
---
## Important
This is not an academic exercise.
The goal is to create a reliable firmware foundation for a children's commercial product.
When applying, please provide:
1. Examples of ESP32 projects you personally developed.
2. Examples involving NFC, audio playback, or consumer devices.
3. Your proposed timeline.
4. Your proposed budget.
5. Whether you can test on real hardware.
Important
The budget for this firmware V1 project is fixed at €300.
Please do not apply if your minimum budget exceeds this amount.
This project is intended as a first functional firmware version for a prototype and future product development. Additional work may be available later depending on results and collaboration quality.
When applying, please provide:
Examples of ESP32 projects you personally developed.
Examples involving NFC, audio playback, or consumer devices.
Your proposed timeline.
Confirmation that you can work within the €300 budget.
Whether you can test on real hardware.
Please begin your proposal with the word BAYANI so that I know you have read the entire project description.
## Project Overview
We are developing BAYANI, a screen-free educational audio box for children inspired by products such as Toniebox.
The hardware platform already exists and includes:
* ESP32
* NFC reader (PN532 or compatible)
* MicroSD card
* Audio DAC (I2S)
* Audio amplifier
* 3 control buttons
* LED indicators
* Li-Ion battery
* USB-C connection
At this stage, we are looking for an experienced embedded firmware developer to create the V1 firmware.
---
## Firmware Features Required
### NFC Figurine Detection
* Detect NFC figurine placement
* Read NFC UID
* Associate UID with audio content
* Start playback automatically when a figurine is placed
### Playback Control
* MP3 playback from microSD card
* Play / Pause
* Previous / Next track
* Volume control
* Smooth audio behavior
### Figurine Removal
* Immediate pause when figurine is removed
* Save playback position
* Resume from last position when figurine is placed again
### Button Management
* Play / Pause button
* Volume Up
* Volume Down
* Long press functions if needed
### LED Management
* Playback status
* Charging status
* Battery indication
* Error indication
### Battery Management
* Battery level monitoring
* Low battery warning
* Charging detection
### USB Mass Storage Mode
* Device appears as USB storage when connected to a computer
* Easy audio content management
* No dedicated application required
---
## Deliverables
* Fully documented firmware source code
* Build instructions
* Firmware architecture explanation
* Demonstration video
* Tested firmware running on hardware (or equivalent validated setup)
---
## Required Skills
* ESP32
* Embedded C / C++
* NFC (PN532 preferred)
* I2S Audio
* MicroSD file systems
* USB Mass Storage
* Battery-powered devices
* Consumer electronics products
---
## Important
This is not an academic exercise.
The goal is to create a reliable firmware foundation for a children's commercial product.
When applying, please provide:
1. Examples of ESP32 projects you personally developed.
2. Examples involving NFC, audio playback, or consumer devices.
3. Your proposed timeline.
4. Your proposed budget.
5. Whether you can test on real hardware.
Important
The budget for this firmware V1 project is fixed at €300.
Please do not apply if your minimum budget exceeds this amount.
This project is intended as a first functional firmware version for a prototype and future product development. Additional work may be available later depending on results and collaboration quality.
When applying, please provide:
Examples of ESP32 projects you personally developed.
Examples involving NFC, audio playback, or consumer devices.
Your proposed timeline.
Confirmation that you can work within the €300 budget.
Whether you can test on real hardware.
Please begin your proposal with the word BAYANI so that I know you have read the entire project description.