So instead of a chime i'm using a 24v relay switch. So when the doorbell is pressed and the relay switches and the circuit is closed the 433mhz transmitter sends a signal to my receiver (rfxcom). With that received signal i can do whatever i want with it. For now i'm using an event that triggers a z-wave alarmbell receiver and it creates a snapshot by capturing the rtsp stream (i'm using a script for that). The snapshot will be forwarded to Pushover. I'm using this transmitter (ACDB-7000B). I don't know if that product is available in the USA.