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Words are how humans communicate. An inexpensive LCD text display can be the most economical way to make your project talk to people, and it’s easy to make a wireless one with an XBee radio.
XBee radios in transparent mode generate plain text right out of their serial port. By pairing the XBee with an LCD that has a serial backpack, any text you send to your XBee will show up directly on the electronic screen. You can use control codes to clear the display, move the cursor or smoothly scroll the text in either direction. Build this example for inexpensive wireless text output. It’s the fastest way for your project to gain human communications!