How to use phyphox to transfer data to the outside device

[endsen]

There is quite some information on Bluetooth Low Energy (BLE) communication in our wiki, https://phyphox.org/wiki/index.php/Bluetooth_Low_Energy, and you also find on that page a link to our Arduino library phyphoxBLE, https://github.com/phyphox/phyphox-arduino (now also being available for MicroPython on ESP32, https://github.com/phyphox/phyphox-micropython, however, lagging a bit behind).

There has been some work done on the back channel for smartphone data in the latest update to phyphoxBLE, so you might start with a look at phyphoxBLE.

Phyphox can not yet interpret images/pictures. We are working on the camera being a future sensor input. I am not sure, though, if it would for your application. What exactly do you have in mind?

Thank you for your reply. 
I am designing a device to demonstrate laser scanning, so I have to design my own software to transmit the scanning pattern to the device.
 Because I don't want to edit a set of software and I found in the depth sensor experiment in phyphox that phyphox called the camera to measure, so I want to try whether I can use phyphox to transmit image data.