Helpe me please

[L0ve13]

Hello everyone, I have my Tidbyt device which no longer displays anything on the screen.
I tried to reset with the back button but nothing changes. I do not see the presence of Tidbyt on the Wifi network.
I reset my Android phone but nothing works.

I checked the power cable as well as the power supply and everything works on another device.

I tried to connect the Tidbyt to my computer and Windows recognizes it because it makes a sound.

I contacted the Tidbyt service by email and they explained to me how to flash the device but I don't know how to do it because I don't have much knowledge.

I installed PlatformIO Core and Pixlet on my computer but then I don't know what to do because I don't really understand what is explained in the Ghitub, I've been stuck for several days

1: Where to download the firmware?
2: How to install the firmware?
3: How to connect the Tidbyt to the computer for flash?

If anyone can help me that would be really nice.

Thank you so much