A GreatFET Neighbor for the 2.4 GHz wireless band.
Required KiCad dependency:
https://github.com/greatscottgadgets/gsg-kicad-lib
If you are using git, the preferred way to install gsg-kicad-lib is to use the submodule:
git submodule init && git submodule update
Crocus is based on the Nordic RF nRF24L01+ and was inspired by The Next Hope Badge.
A notable capability of nRF24L01+ is 2 Mbps FSK. Many 2.4 GHz wireless transceiver ICs (including the CC2400 on Ubertooth One) only support FSK up to 1 Mbps. See Promiscuity is the nRF24L01+'s Duty for an excellent trick that can be done with Crocus.
FIXME: We don't have any firmware yet, but we should implement capabilities similar to goodfet.nrf.
| signal | pin | alt1 | alt2 |
|---|---|---|---|
| SCK | J1.38 | J2.32 | |
| COPI | J1.39 | J2.30 | |
| CIPO | J1.40 | J2.38 | |
| CSN | via I2C | J1.37 | J1.29 |
| CE | via I2C | J2.9 | J2.21 |
| SDA | J2.39 | ||
| SCL | J2.40 | ||
| INT | J2.4 | J2.34 | J1.36 |
Alternative pins may be selected with solder jumpers.
The default I2C address is 0x27. Alternative addresses in the ranges 0x10-0x2F, 0x50-0x67, or 0x70-0x77 may be selected with solder jumpers. Refer to the Crocus schematic and to the PCA9674 data sheet for details.