1. Start here
    1. Welcome
    2. Specifications
    3. General background info about SW/HW
    4. Assemble the HW
    5. Install SW
    1. Campaigns
      1. Funded: Crowd Supply PC 1
      2. Funded: Crowd Supply PC 2
    2. Use it
      1. Success stories
      2. Get support
    3. Sponsoring
      1. Become a sponsor
    4. Contribute
      1. Build Firmware
      2. contributing code
      3. images .. documentation

USB to UART connection

GnuBee USB to UART

Most embedded System-on-chips come with an UART or TTL integrated into the System-on-chip to allow debugging, firmware replacement or serial connection.

The GnuBee Personal Cloud routes the UART connection to a 3.5mm (1/8”) Audio Jack for convenient use.

The GnuBee USB to UART uses a Winchiphead CH340G USB to serial chip from Nanjing QinHeng Electronics Co.,Ltd. to convert the UART signal to USB.

The Linux kernel identifies this chipset as the “QinHeng Electronics HL-340 USB-Serial adapter”

Users of other Operating Systems can find drivers in the drivers directory.


Common methods to change firmware in case of any problems.

Larry uses GNU Screen AND tftpd-hpa and starts it calling

screen /dev/ttyUSB0 57600

Niklaus uses minicom and starts it by calling

minicom -b 57600 -D /dev/ttyUSB0

Windows users can download an install PuTTY AND TFTP32)

Baud Rate: 57600 / Data Bits: 8 / Parity Control: NO / Stop Bits: 1 / Handshake: NO