GBA games and brightness questions

[Flavor]

RetroGM! Yes, there is a pretty easy way to permanently turn off the WiFi/BT. The easiest way is to pop the SD card out and use your Win/Mac to edit the confix.txt file.

In there, you should find these lines.
# remove # from following 2 lines to turn wifi and bluetooth off (if not needed, can Speed Up Pi Zero W)
#dtoverlay=pi3-disable-wifi
#dtoverlay=pi3-disable-bt

If you find them, just remove the # in front of the dtoverlay lines. If you don't find them, you can just paste them in there.

If you already have your machine closed up and don't want to open it up just to pull the SD out, then you can SSH in and edit the file.
https://github.com/RetroPie/RetroPie-Setup/wiki/SSH talks a bit about that, and has the username/password

Once logged in, you could
sudo nano /boot/config.txt

Just know, once you turn that stuff off, you won't be able to SSH in again.

I'm sorry to say that the brightness on the Freeplay Zero is not configurable.

For future versions of the Freeplay CM3 (or if people want to mod their own board), we are looking into some options, because the Compute Module 3 has a lot more GPIO lines available.