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Arduino Uno and a HopeRFM22B Transceiver

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Published on Nov 3, 2012

This video is a demonstration video of a basic design project for the Communications Electronics (EE413) class held at the University at Buffalo, SUNY. It demonstrates the capabilities of the open source Arduino Uno R3 microcontroller, and a Hope RFM22B transceiver module. The wireless keylogger is a hybrid keylogger in that it utilizes an API to hook keystrokes in the Windows environment and sends the data to a serial port. The microcontroller receives the incoming serial data and transmits, via SPI, to the RF transceiver module to transmit the byte. A remote transceiver module receives the data package, and transmits the data to the microcontroller, via SPI as well. The microcontroller stores the data on an SD card, and displays it on a 20x4 LCD module. For our project, since the 3.3V Vcc on the Arduino is limited to 50mA, we set the receiver module to transmit at +13dBm. We were able to achieve a range of approximately 200ft with this basic prototype setup and a 1/4 wavelength wire as an antenna. With a segregate voltage regulator, transmit power can be set to up to +20dBm, which would allow for significant range improvement.

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