This kit comes with one 433MHz transmitter and one 433MHz receiver.  They can easily fit into a breadboard and work well with microcontrollers to create a very simple wireless data link. Since these are only one transmitter and one receiver, they will only work communicating data one-way, you would need two pairs (of different frequencies) to act as a transmitter/receiver pair.

University students will find these are great to practice data transmission techniques and programming. Put theory into practice by coding and decoding your own preamble, header, payload and CRC.

Note: These modules are indiscriminate and will receive a fair amount of noise.  Both the transmitter and receiver work at common frequencies and don't have IDs. Therefore, a method of filtering this noise and pairing transmitter and receiver will be necessary. The example code below shows such an example for basic operation. Please refer to the example code and links below for ways to accomplish a robust wireless data link.

There is no attached antenna so the user must cut and solder wires to the hole marked ANT. A wire antenna is a multiple or fraction of the length of the radio wave. A 433MHz wave is 692.36 mm long. Typical and convenient lengths for 433MHz wire antennas are 87 mm or 43mm.

Features:

• 433MHz
• 500ft range (given perfect conditions)
• 4800bps data rate (2000 bps default in RadioHead library)
• Modulation: ASK (Amplitude Shift Keying)
• 5V supply voltage
• Transmitter current resting: 0mA, Transmitter current sending: 17mA
• Receiver current: 5mA

Documents:

• Recommended library: RadioHead

Tutorial: How to set up 433 MHz Transmitter and Receiver using RadioHead library