CaribouLite RPi HAT open-source SDR Raspberry Pi HAT tunes as much as 6 GHz (Crowdfunding)

CaribouLite RPi HAT is an open-source dual-channel software-defined radio (SDR) Raspberry Pi HAT – or somewhat uHAT – that works within the sub-GHz ISM vary and optionally the 30 MHz – 6 GHz vary for the complete model.

Developed by Israel-based CaribouLabs, the micro HAT is supplied with a Lattice Semi ICE40LP1K FPGA, a Microchip AT86RF215 RF transceiver, two SMA antenna connectors, a Pmod growth connector, and designed for any Raspberry Pi board with a 40-pin GPIO header.

Raspberry Pi HAT SDR 6 GHz

CaribouLite RPi HAT specs:

  • FPGA – Lattice Semi ICE40LP with 1.28 kLE
  • RF Chipset – Microchip AT86RF215 Sub-GHz / 2.4GHz transceiver
  • Qorvo’s RFFC5072 built-in Mixer IC (for full model solely)
  • Tuning Vary
    • CH1
      • Full model – 30 MHz – 6 GHz
      • ISM model – 2.4 – 2.4835 GHz
    • CH2 – Sub-1GHz
  • Max Sampling Fee – 4 MSPS
  • ADC/DAC Decision – 13-bit
  • Max RF Bandwidth – 2.5 MHz
  • Transmit Energy – as much as 14 dBm @ISM frequencies
  • Frequency Stability – <±2 ppm
  • Twin-half Duplex operation
  • Clock – 26 MHz TCXO
  • 2x SMA antenna connector
  • Host interface – SMI (Secondary Reminiscence Interface) interface to Raspberry Pi
  • Elective GPS help with add-on
  • Growth – 8-bit PMOD connector for GPIOs, GND, 3.3V
  • Misc – Consumer change and person LEDs, RF exercise indication LEDs
  • Energy Provide – 5V through Raspberry Pi header; LDOs delivering 3.3V, 2.5V, and 1.2V alerts
  • Dimensions – 65 x 30 mm
  • OSHWA certification – IL000002
Raspberry Pi HAT Block Diagram
Block Diagram

CaribouLite HATThe HAT additionally consists of an EEPROM with board info, system tree overlay, and drivers to be robotically acknowledged and configured by the Raspberry Pi board connected to it. The corporate additionally offers libcariboulite library, SoapySDR drivers, device-tree overlays, pattern code, firmware, and {hardware} design information (PDF schematics solely) on Github. The software program allows the board for use with SDR packages equivalent to SDR-PlusPlus, GQRX, CubicSDR, GNU-Radio, and extra.

The uHAT interfaces with the Raspberry Pi by means of the SMI (Secondary Reminiscence Interface) of the Broadcom BCM2xxx processor which I don’t assume I ever heard of, and CaribouLabs confirms the ” interface had not been totally investigated beforehand”. You'll find extra particulars on the Caribou-SMI API Driver page.

SDR-PlusPlus Raspberry Pi
SDR++ working on Raspberry Pi

CaribouLabs has launched the CaribouLite RPi HAT on Crowd Supply with a $112,500 goal. Rewards begin at $69 for the CaribouLite-ISM (Sub-Ghz + 2.4 GHz), and $119 for the mannequin supporting as much as 6 GHz tuning. Transport provides $8 to the US, $18 to the remainder of the world, and deliveries are scheduled to start out on the finish of Could 2022.

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