Connect one HC-05 "master" to two slaves at the same time
AT+CMODEis mainly used for setting the address pairing purpose. What chrisl stated is exactly true, you cannot connect more than 1 slave to the master at a time. When you set the parameter as 2 you actually set a passive connection, a connection between master and slave to receive the remote Bluetooth master device data and send it back to the master device. It is like a feedback-loop, and is mainly related for testing the connectivity and other features of the PAN (Personal Area Network). So actually whatever is received from the master, is sent back again to the master by the slave.