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I just got my hands on a 433MHz RF Wireless Transmitter and Receiver Module and I was wondering if anyone knows how to send text data (not just yes or no) using them and a RPI. I would appreciate it if you could point me in the right direction like with a tutorial or something along the lines of that. thanks you very much!

BTW: I am using a RPI B

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  • So you want to send text from a RPi over the radio. Where to?
    – joan
    Feb 28, 2021 at 20:04
  • to another raspberry pi
    – powplowdevs
    Feb 28, 2021 at 20:39
  • each character is 10 yes/no one after another ... that is how serial communication works
    – jsotola
    Feb 28, 2021 at 22:51

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Some wireless transmitters (e.g. LC-2000PA) support UART mode, in which case you can just wire them to TX/RX pins of the Pi's UART, open /dev/serial on both sides, and start communicating.

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VirtualWire (trademark) is an algorithm for sending short messages over a radio link (e.g. by 313MHz and 434MHz tranceivers).

One of the pigpio examples is an implementation of the VirtualWire algorithm for the Raspberry Pi.

VirtualWire example.

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