The Crazyradio PA is a 2.4 GHz radio USB dongle with a power amplifier.

Currently it's only used to communicate with the Crazyflie Nano Quadcopter but it can be adopted to work with a number of applications that are based on the low-cost 2.4 GHz chips from Nordic Semiconductor.

• Radio power amplifier giving 20dBm output power
• > 1km range LOS with Crazyflie 2.0
• 2×5 2.54mm header for prototyping (not mounted)
• Hardware support for PPM
• Same mechanical footprint as the first generation Crazyradio
• Open source firmware
• Firmware upgrade via USB
• Low latency

• Install Crazyradio driver on Windows XP to 8 (This is now the recomended procedure)
• Firmware upgrade

• How to contribute to the project
• Development environment
• Usb and radio protocol
• SPI programming

• Schematics

• Based on nRF24LU1+ chip from Nordic Semiconductor
  • 8051 MCU at up to 16MHz with 32Kb flash and 2Kb SRAM
  • 2.4GHz ISM band radio
  • USB device peripheral
  • 125 radio channels
  • 2Mbps, 1Mbps and 250Kps communication data-rate
  • Sends and receives data packets of up to 32 bytes payload
  • Automatically handles addresses and packet ack
  • Hardware SPI and UART
  • Compatible with Enhanced ShockBurst protocol from Nordic Semiconductor
• Radio specification:
  • 20dBm output power (100mW)
  • Low Noise Amplifier (LNA)
  • RP-SMA connector
• Can be powered with up to 13V via expansion header
• 2×5 2.54mm expansion header with following signals (not mounted):
  • Hardware support for PPM input
  • Up to 13V input power
  • GND
  • PPM
  • SPI/UART
• Standard USB-A connector
• Mechanical specification:
  • Weight: 6g
  • Size (WxHxD): 58x16x6.5mm (including connectors)