Fire detection on rasperry pi

what we need is to to deploy a yolov4 model that is converted to tensorflow lite ( we already did the model) into a rasperry pi device which will take the input from a rasperry pi camera and detect the fire by the model, if a fire or smoke is detected by the model we need to do an events which is :
1- Changing a value of a connected Firestore database to recognize that a fire or smoke is detecte EX, Fire : "yes"
Also, turning on the buzzer and Led that we connected to the rasberry pi by reading a value from the connected Firestore database Ex. if Fire: "yes" then turn on