Velleman WFS210

Velleman WFS210 with Nexus 7

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 -vvv output) about the device.

Description

I saw this first in Maplin (UK electronics chain) priced at about £180. It seemed a lot for a 2-channel, 8 bit, 1MHz oscilloscope shipped without probes or charger, but it has some unusual features :

• 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, much praise to Velleman for

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

I had a need to monitor the signals on some rotating machinery, so when I saw a brand new example of this on an auction site for 1/4 the listed price, I snapped it up.

Hardware

Control logic

• Microchip dsPic33EP256MU806 microcontroller
• 12MHz crystal: clock source for the dsPic

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

• 

  WFS210 with Android tablet

• 

  Screws under feet

• 

  Under cover

• 

  PCB with screen

• 

  Battery and switch

• 

  Wifi radio

• 

  PCB topside

• 

  PCB underside (no components under foil)

Protocol

http://www.velleman.eu/downloads/0/information/protocol_wfs210.pdf

Resources

Software :

• iTunes
• Android (4.0 or later) Android sourcecode
• Windows

Manuals :

• Datasheet
• quickstart manual
• user manual