that's cool. thanks for taking the time to responde.

1- thank you
2- hmm OK. I am trying to flash a binary built using W801 SDK. I am flashing at 115200 baud. I can flash other binaries OK at this speed and faster. what other reasons are there for NAK error?
3- OK. Maybe I am mis-reading this post - http://ask.winnermicro.com/article/186.html - where it says "actual testing by netizens shows that W806 is still equipped with Wi-Fi and Bluetooth cores)" - this sounds like wifi should work on W801?
4- that's a shame. could this feature be added to the Upgrade Tools app for dumping via UART?

thank you.

where can I buy a W861 development board?

has anyone actually got wifi working on a W806 though?