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

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.