I'm network grad student and not familiar with Arduino .But we have to do a project that related to Arduino. So we are planning to build a smart light system for a house. We are planning to make a mesh network with Arduino Uno boards and nrf24l04. i just want to know can we use a HC-06 bluetooth module to receive signals from the android smart phone and pass that signals to other nodes through the nrf24l01 module with the same Arduino Uno ?
Yes. NRF is an SPI device, while HC-05 is on serial. There are other, likely more elegant, ways of doing this, but what you propose is reasonable. NRFs talk amongst themselves in the Arduino world, and the HC-05 gets messages from the outside world.