Specifications

8
Frequency Output Power
Table 2 | Pin Definitions
Power Consumption
125kHz: 902.3-914.9MHZ
10.19dBm
500kHz: 903.0-914.2MHZ
11.41dBm
Recommended Circuit
SWD programming Port
In order to upgrade the firmware, the SWD (Serial Wire Debug) interface must be
used. A 5 pin JLINK cable has to be connected to the SWD port. These pins are:
3v3, SWDIO, SWCLK, and MCU_NRST.
UART ports
There are two UART ports on RAK4270 module. UART2 (pin1 and pin2) can be used
as the command port, while the UART1 (pin4 and pin5) can be used both as command
port and firmware upgrade port. It is recommended to connect the UART2 port to an
external MCU and reserve UART1 for debugging and or future firmware upgrade
purposes.
The serial communication parameters to connect to the UART2 port are: 115200 / 8-
N-1.