The only difference (that I can see/remember) is that I changed the acknowledgement code from ACK to FTS. Older sketches send ACK. The newer sketches send FTS.
Mage some updates and the new beta version can be downloaded from
This contains am Arduino sketch and a Windows PC app the 2 must be used together. This sketch does not work with the Android app.
I have simplified the acknowledgement process, added a continue after time out, a pause button and a reset button on the Loop Page.
Please give it a try and let me know how you get on.