I have searched everywhere and can only find the reverse of what I want. It always shows controlling the rpi with an Alexa, but not Alexa with a rpi.
Basically what I want is to send a command to all of my Alexa's to speak a phrase when an input to the rpi gpio happens.
For instance, when GPIO 10 goes to HIGH, broadcast to all alexas "Attention! The trigger has been tripped!"
Can someone point me in the right direction?