Hi @Lobobueno
Welcome to the Sonos Community!
Sorry to hear of this issue you are having with connecting your Era 100 speakers to your projector with Bluetooth.
While I agree with @jgatie in that you would be better-off with a speaker designed for the purpose with which you are using it, I think it is suspicious that your Move 2 works fine over Bluetooth while your Era 100s do not - I recommend you get in touch with our technical support team who have tools at their disposal that will allow them to give you advice specific to your Sonos system and what it reports.
I hope this helps.
"Common sense is the collection of prejudices acquired by age eighteen." - Albert Einstein