To use your SL3 with our Exposio app, you need to change few settings in the camera. 

Open the menu on your camera: 

1) Image quality at S1:

2) Image review at Off:

3) Drive mode at Single Shooting

4) In the Wireless setting, select Wi-Fi settings

5) Make sure to have no password : None

6) Set the Auto power off at 15 minutes :

7) Make sure the camera is on Manual Mode (M) 

8) Put the lens on automatic focus. 

You are now ready to connect your cellphone to the camera: SEE HOW