$7 DongshanPI-PicoW is a small Arm Linux board with SSW101B USB WiFi chip, four 12-pin headers

Based on its name, the DongshanPI-PicoW board/module aims to be an Arm Linux alternative to the Raspberry Pi Pico W with a SigmaStar SSD210 dual-core Cortex-A7 processor with 64MB RAM, an SSW101B USB WiFi 4 chip, plus a good amount of I/Os thanks to four 12-pin headers.

The module also comes with a 128MB SPI flash to run Linux, takes 5V power input, and offers a display interface up to 1280×800, USB 2.0, audio interfaces, and more in a small 31×31 mm form factor with 48 through and castellated holes that should be easy to integrate into compact devices.

DongshanPi PicoW pinout digram

DongshanPI-PicoW specifications:

  • SoC – SigmaStar SSD210 dual-core Arm Cortex-A7 at up to 1.0GHz with FPU, NEON, MMU, DMA, 2D graphics accelerator, 64MB on-chip DDR2 RAM
  • Storage – 128MB SPI NAND flash (Winbond W25N010)
  • Connectivity – Sigmastart SSW101B 802.11b/g/n 2.4GHz 1T1R WiFi 4 module + u.FL antenna connector
  • USB switch – Onsemi FSUSB30 2-port switch
  • Four 12-pin 2.0mm pitch headers with castellated holes
    • Display
      • Up to 2x MIPI interfaces with 2 or 1 data lane and 2 clock lanes
      • TTL output up to 1280×800 60fps
    • Audio – MIC and DMIC inputs, Line out, 8-channel I2S/TDM with 2/4/8-channel Rx, 2-channel Tx
    • Networking – 1x 10/100M Ethernet
    • USB – 1x USB 2.0
    • Misc – 1x SDIO 2.0, 2x SPI, 2x I2C, 4x UART, 4x PWM, GPIOs
  • Security Engines (AES/DES/3DES/RSA/SHA-I/SHA-256)
  • Misc – Reset button
  • Power Supply – 5V via I/O pins
  • Dimensions – 31 x 31 mm (estimated)

DongShanPi-PicoW programming USB debug

The lack of a physical USB port makes the PicoW module great for integration into projects, but you’ll need some wiring for power and programming. The photo above shows the DongShanPi-PicoW soldered to a 2.0mm to 2.54mm pitch adapter with a micro USB board connected for power and flashing the firmware, and a USB to TTL debug connected to UART to access the serial console.

You’ll find some documents in Chinese as well as the schematics and a Linux image and flashing tools in the Wiki. Questions can be asked on Twitter or in a forum. SigmaStar SSD2xx processors have some support in Linux mainline, and additional information can be found on the Linux Chenxing website.  I suppose the module could also replace the Raspberry Pi Zero W for some lightweight applications that may not need 512MB of RAM or an HDMI display. Connecting a MIPI display is possible, but you’d need to find a display that works with the module.

The DongshanPI-PicoW is sold on Aliexpress for $6.71 plus shipping (around $10 in total), but without the 2.54mm pitch adapter board, so you’d need to do some light soldering to wire the board for power and the serial console.

Share this:

Support CNX Software! Donate via cryptocurrencies or become a Patron on Patreon

ROCK Pi 4C Plus
Notify of
The comment form collects your name, email and content to allow us keep track of the comments placed on the website. Please read and accept our website Terms and Privacy Policy to post a comment.
Weller PCB manufacturer