my buddy and i have a robot and we want to create a way to make the robot travel between two points. We decided to use RF antennas as the point travels. So we will have two yagi stationary antennas as transmitters, and on our robot we will have two mono-pole omnidirectional antennas as receivers. Both will have different frequencies so the robot can distinguish in which direction to follow ( freq: 315Mhz & 433Mhz).
We have 433Mhz modules that can be configured to 315Mhz but we are not sure if the arduino can follow the signal strength (RSSI) of the wave generated by the transmitter.