The Pololu IR beacon is a compact board that is used in pairs to allow robots to locate each other.
This kit contains a 125 KHz RFID reader and additional parts.
If you're going to use a RF module that needs an SMA antenna, we've got you covered! Here's a 152mm swivel/tilt whip with RP-SMA connector!
The SN171 Synapse ProtoBoard is a very convenient way to connect any Synapse SNAP module to a RS232 port - ideal for playing with your new RF Engine!