SSH into Stratux - cyoung/stratux GitHub Wiki
Starting with build v1.2r1, SSH is disabled by default. To enable it, connect the microSD card to a computer and place a file named "ssh" (without quotes and with no extension) on the boot partition of the microSD card. Source
Use a free tool such as putty.
While connected to Stratux SSID
Host: 192.168.10.1
Username:pi
Password:raspberry