Hi,
I have received mine from Amazon UK yesterday:
Firmware 4.4 Build 1708.
Windows Application V1.1.0.295.
Android Application V1.2
The first hour with it was quite disappointing:
I have tried it on my old XP machine connected with USB. I did not succeed to have any trace on the screen although I heard relay clicks when changing settings. Tried a scope calibration and I had to abort it after a few minutes of no visible activity. Then switched to WiFi with no more success until I noticed that it was trying to connect to the IP address 169.254.1.1.
After changing this address to the correct address 192.168.1.1, I managed to connect to the oscilloscope, but still no trace. When playing with the controls I eventually started to see a trace but with a huge offset and no sync. Replaying the calibration finally fixed all issues and I managed to have the toy work reasonably well.
500kHz seems to be the maximum usable frequency:
Above that frequency, the trace is slightly distorted, but the triggering is unstable :
No peak detect, the sync. pulse is not always sampled (but it can perfectly trigger on the pulse) :
Did not check the accuracy.
At first, I did not give much attention to the warning message when used with a USB link (Probe ground and charger ground at different voltage level).
In fact, when using such a connection, it is impossible to connect the ground pin of the oscilloscope to the ground of the computer. Doing that sends the trace out of the screen, with no way to have it come back.
As a consequence, an isolated USB link or a laptop with no ground connection seems mandatory to use it on a bench.
The android application did not work on my old Sony XPeria Tab (Android Jelly Bean): it is able to connect to the scope, but the interface is totally unresponsive.
It seems OK on a more recent Samsung Tab.
Michel.