Start the watch normally (not a DFU mode)
In a command line start 'bluetoothctl scan on' to find the MAC adress of the watch. It should look something like this:
Device EC:X:X:X:X:X PineTime
Connect to the watch in the command line tap: 'bluetoothctl connect EC:90:F3:05:E6:27'
Now you can use the wasptool to send commands to the watch and fetch the data from it
To check if it worked, try this command from the wasp-os directory. It should reset the time on the watch to current time.
~/wasp-os $ ./tools/wasptool --rtc