PineBuds Pro

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The PineBuds Pro

The PineBuds Pro are open firmware capable ANC wireless earbuds. Some of the notable features include their light weight, 3 Microphones, ANC (Active Noise Cancellation), ENC (Environment Noise Cancellation) and high fidelity 6mm speaker. It is a fully community-driven side-project which anyone can contribute to, allowing you to keep control of your device even though hardware is proprietary.

Short overview / Specifications

Dimensions:

Earbud: WIP
Charging case: 70 x 50 x 35mm (source)

Weight:

Earbud: 5g
Charging case: 65g

IP Rating of Earbuds: IPX4
System on Chip: BES 2300YP
Flash: 4MB (Endurance erase cycles: >500)
SRAM: 992KB
Bluetooth: Bluetooth 5.2 dual-mode compliant
Battery:

Earbud: Built-in LiPo 3.7V 40mAh
Charging case: Built-in LiPo 3.7V 800mAh

Work in progress

Silicone case

Goal is to make a silicone case like this for PineBuds Pro.

"Design a mold, use a hobby 3D printer to manufacture it, then fill with silicone." (source)
"You can find a local hackspace or makerspace. Or you can use one of the many services available via the Internet who can print a model for you. Just design, upload, and pay." (source)
"The only one I know of is "https://www.pcbway.com/rapid-prototyping/injection-molding/"" (source)

Software releases

Firmware Images Build

Flash back factory default firmware using Windows based utility:

SDK Release

SoC and Memory Specification

BES-Tech.jpg

BES2300YP Block Diagram.jpg

SoC Architecture

Cortex-M4.png
    • CMOS Single-chip Fully-integrated RF, PMU, Audio CODEC and Cortex-M4F CPU
    • 4MB Serial Flash On-chip for Custom Program
    • Internal ROM 448KB for critical constants and code
    • Internal SRAM 992KB for critical data and code
  • BT Features:
    • Bluetooth 5.2 dual-mode compliant
  • Audio Features:
    • Support BES Intelligent Bluetooth Retransmission (IBRT)
    • Support FF/Hybrid ANC
    • Dual MICs noise reduction
    • Echo Cancellation
    • Support low power voice activity detection
    • Multi-band EQ and Bass enhancement
    • Support Active Crossover
    • Support TWS
    • HiFi Stereo Audio DAC: 120dB SNR, 110dB DNR
    • HiFi Stereo Audio ADC: 100dB SNR

²* Sample rates from 8 kHz to 384 kHz

    • Support dual/single Mic noise suppression
    • Support ambient awareness
    • Support talk through
    • 24-bit audio processing
  • PMU Features
    • 3.1V-5.5V Input for VBAT
    • Internal LPO for low power mode.
    • DCXO with internal oscillator circuit
    • Internal temperature sensor

Information, Schematics and Certifications

Datasheets for Components and Peripherals