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Radio
Allen Snook edited this page Jul 1, 2020
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The radio is an Adafruit RFM69HCW packet radio operating in the 900 MHz ISM band. The MCU uses an SPI interface (SPI1) to communicate with the peripheral, along with with two GPIO pins for /CS and RESET. The receiver's radio uses a quarter wave monopole antenna to receive the weather packet data from the similarly equipped transmitter.