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If your project only needs to transmit data at a certain frequency, then a simple RF transmitter is perfect. Pair it with a receiver of the same frequency and you're set.
  1. RF Link Transmitter - 434MHz WRL-10534 Sparkfun Australia - Express Delivery Australia Wide

    RF Link Transmitter - 434MHz

    SKU: WRL-10534
    These wireless transmitters work with our 434MHz receivers. They can easily fit into a breadboard and work well with microcontrollers to create a very simple wireless data link. Since these are only transmitters, they will only work communicating data one-way, you would need two pairs (of different frequencies) to act as a transmitter/receiver pair. Learn More
    $5.77 AUD, inc GST
    AUD, inc GST
    delivered by
    Mon 18th of Dec

    $5.77 AUD

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