Arduino Uno >Xbee S1 > Xbee S1 > buzzer

hi, just a general question. is it possible to use 2 Xbee Series 1(10CD firmware) via API mode 1 to trigger buzzer based on RSSI value(distance)? one xbee will be the based(transmit) the other will be the remote xbee(receiver). because when i research online, only S2 are workable not S1. but since S1 have API mode. i was wondering if it is able to use it for my project

I would like to know it too but until this moment I really didn’t find any answer.