Processor ADF7023 transceiver, Cortex-M3 EFM32G230 @ 28 MHz. Data Interface UART (3V), SPI. CPU/Clock Speed N/A HCS08 / Up to 50.33 MHz. Spread Spectrum FHSS (Software Selectable Channels). GPIO Up to 15 Digital I/O, 4 10-bit ADC inputs, 2 PWM outputs.
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