Velleman WFS210

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Velleman WFS210

The Velleman WFS210 is a claimed to be the first WiFi oscilloscope. It has 2 channels, and 10MS/s sampling rate per channel.

See Velleman WFS210/Info for more details (such as lsusb -v output) about the device.

Description

  • 2 channels, 8 bit, 10MS/s
  • Wifi & internal battery for self-contained remote connection to a tablet or PC
  • Charges off USB (mini plug)
  • Supported on IOS, Android 4, Windows

And, notably :

  • Sources for Android build on github
  • Protocol description on manufacturers site

Hardware

Control logic

USB interface

  • Onboard the dsPic

Wifi interface

  • Roving Networks (Microchip) RN171-I/RM

Analog frontend

  • 6 x EGE EDR301A0528 reed relays (3 per input channel)
  • 6 x variable capacitors (3 per channel)
  • 4 x variable resistors (2 per channel)
  • 2 x Texas Instruments OPA354 op-amps
  • 1 x Microchip 6404E quad op-amp
  • 1 x Maxim 1192E 8-bit 22MSPS dual A/D converter

Power

  • 1 x 3.7V 1.8Ah lithium battery
  • 1 x 7387 lithium pack charge controller
  • 1 x TJ 42MD7LE regulator

?

  • 8-pin pack marked 'NXC' near TI opamps

Photos

Protocol

The protocol is publically documented by the vendor.

(oddly, the protocol is described in terms of frames such as <STX> ... <ETX> as though on a serial stream. It doesn't mention TCP ports or USB endpoints)

Resources

Note

When taking it apart, I broke it: the power button really needs to be removed first / fitted last. Levering the board out without removing the button damaged the switch. A wire link fixes it for now. Beware!