https://mikrophone.net/

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mikroPhone

The goal of this project is to develop a privacy enhanced, simple and
fully featured mobile phone. For more information about the project
see about page.

Technical specs

  * Central MCU: SiFive Freedom E310-G002 (RISC-V) microcontroller
  * Wireless: Espressif ESP32 Wi-Fi + Bluetooth
  * Cellular modem: Mini PCIe module (SIMCom SIM7600X or Quectel
    EC-25)
  * Graphics: BT817 Display controller
  * Audio: 2xMAX98357A Class D amplifier / PCM1770 headphone
    amplifier / ICS-43434 MEMS Microphone / MAX9814 microphone
    amplifier
  * Storage: SD card (FAT filesystem, AES/Blowfish encryption
    support)
  * Power: Lithium battery + charger (BQ25895)

Source

git repository can be cloned by running the following command:

git clone https://git.majstor.org/mikroPhone

Repository contains following directories:

  * hw/mikroPhone: KiCad project that contains main board schematics
    and layout
  * hw/display: KiCad project that contains display adapter board
    schematics and layout
  * hw/prog: KiCad project that contains FT2232H-56Q adapter board
    schematics and layout
  * 3d/mikroPhone.FCStd: FreeCAD project that contains 3d printable
    phone case
  * fw/fe310: Firmware for Freedom E310 SoC
  * fw/esp32: Firmware for Espressif ESP32 SoC
  * ecp: EllipticCP implementation

Current status

mikroPhone

  * Hardware design of core part completed. 128x68mm prototype board
    built and tested;
  * Central MCU OS almost feature complete. Supports basic phone
    functionality (cellular voice and SMS messaging);
  * EllipticCP implementation tested for real time voice
    communication;
  * Support for app-module in progress. Module envisaged i.MX 8M Plus
    Computer on Module;
  * 3d printable phone case designed in FreeCAD;

For more information go to history

For building instructions visit how to build my mikroPhone.

License

Hardware licensed under the CERN OHL v1.2

Software licensed under the GPLv2

Acknowledgments

This project is funded through NGI0 Entrust, a fund established by
NLnet with financial support from the European Commission's Next
Generation Internet program. Learn more at the NLnet project page.

NLnet foundation logo NGI Zero Logo