RAK5146 Interfaces are listed below:
Power Supply
- The RAK5146 concentrator module must be supplied through the 3.3Vaux pins by a DC
power supply. The voltage needs to be stable since the current drawn can vary significantly during operation
based on the power consumption profile of the SX1303 chip (for more information, see the
SX1303
Datasheet (opens new window)
).
SPI Interface
- SPI interface mainly provides for the Host_SCK, Host_MISO, Host_MOSI, Host_CSN pins of the
system connector. The SPI interface gives access to the configuration register of SX1303 via a synchronous
full-duplex protocol. Only the slave side is implemented.
USB Interface
- The USB interface mainly provides for the USB_D+, USB_D- pins of the system connector.
The USB interface gives access to the configuration register of SX1303 via an MCU STM32L412KBU6. Only
the slave side is implemented.
UART and I2C Interface
- RAK5146 integrates a ZOE-M8Q GPS module which has UART and I2C interface.
The PINs on the golden finger provide a UART connection and an I2C connection, which allows direct access
to the GPS module. The PPS signal is not only connected to SX1303 internally but also connected to the
golden finger which can be used by the host board.
GPS_PPS
- RAK5146 includes the GPS_PPS input for received packets time-stamped and Fine timestamp.
RESET
- RAK5146 SPI card includes the RESET active-high input signal to reset the radio operations as
specified by the SX1303 Specification. RAK5146 USB card’s RESET is controlled by MCU.
Antenna RF Interface
- The module have one RF interface over a standard UFL connector (Hirose U. FL-R-
SMT) with a characteristic impedance of
50Ω.
The RF port (J1) supports both Tx and Rx, providing the
antenna interface
Notes:
Do not power the module without connected antenna/s. This may damage the radios.
