RAK4200 WisDuo Breakout Board AT Command Manual

Introduction

The RAK4200 Breakout Board is designed to simplify LoRa P2P (peer-to-peer) and LoRaWAN communication. It eliminates the need to handle the complex SPI protocol of LoRa transceivers by offering a familiar serial communication interface. This interface enables you to send commands and check the board's internal status, providing a straightforward way to integrate LoRa technology into your projects.

In addition to the serial interface, a set of AT commands is provided, allowing an external microcontroller to control the RAK4200 Breakout Board like a traditional AT modem. These commands enable you to configure LoRaWAN communication parameters, control GPIO pins, and manage analog inputs, among other functions.

The RAK4200 Breakout Board exposes serial communication on the UART1 port via Pin 4 (UART1_TX) and Pin 5 (UART1_RX). The UART1 communication parameters are 115200 baud rate, 8 data bits, no parity, and 1 stop bit (8-N-1). Firmware upgrades can also be performed through this port. For detailed information on the board's pin distribution and a reference application schematic, consult the RAK4200 Breakout Board Datasheet. A summary is available in Appendix IV.

In addition, the RAK4200 Breakout Board also exposes another serial port through Pin 2 (UART2_TX) and Pin 1 (UART2_RX). This port is named UART2. You can use it to connect another MCU or an additional UART peripheral, such as a GPS module.

UART2 is available on Pin 2 (TX2) and Pin 1 (RX2) of the module. If your application only requires a single UART port, it is recommended to use UART2 to connect to your MCU, leaving UART1 reserved for future firmware upgrades.

Links to Quick Start Guide

For AT commands example usage, check these sections of the quick start guide:

• TTN OTAA/ABP

Software Tool

If you don't have a serial port tool yet, it is recommended to download and install the RAK Serial Port Tool. There are some ready-made AT commands in this tool that will be very useful for you.

• RAK Serial Port Tool

For more detailed information on how to use this tool, refer to the following guide:

• RAK Serial Port Tool Guide

AT Command Syntax

AT commands are based on ASCII characters. Each command begins with the prefix AT or at and ends with <CR><LF> (i.e., \r\n). The maximum length of an AT command is 255 characters, including the <CR><LF> at the end. For clarity, the \r\n suffix is omitted throughout the rest of the document.

The AT commands can be classified into the following groups:

• Read Command: Used to retrieve the current configuration or status of the module. The command name and parameter list are separated by the = character, while the <m> parameter and its associated value <n> are separated by the : character.

at+get_config=<m>:<n>

• Write Command: Used to write or modify the module's current configuration. The command name and parameter list are separated by the = character, while the <m> parameter and its associated value <n> are separated by the : character.

at+set_config=<m>:<n>

• Operational Command: Commands used to execute specific actions rather than reading or writing configurations.

at+send=lora:<m>:<n> // Sends data through the LoRa transceiver.

• Special Command: The RAK811 UART port operates in two modes: Configuration Mode (default) and Data Transmission Mode. In Data Transmission Mode, ASCII payloads can be sent directly to the network server via UART without using the AT Command interface, such as at+send=lora:X:YYY. For more details, refer to the Interface Type AT Command section of this document.

NOTE

To enable Data Transmission Mode, use the command: at+set_config=device:uart_mode:<index>:<mode>. To switch back to Configuration Mode (default AT Command mode), input +++. Note that the +++ command does not include terminators such as \r or \n.

After the command is executed by the module, a reply is sent back to the external MCU. If the command is successful, the usual reply has the following format:

OK [information]\r\n

NOTE

Only Read Commands provide information in the reply message, whereas Write Commands do not include an informative description in their responses.

The firmware developed running in the external MCU will expect at a minimum string of Ok\r\n after sending a successful command to the board. On the other hand, when the command is not successfully executed by the board, you will receive a response in the following format:

ERROR: [ErrCode]\r\n

Error Code Table

Error Code	Description
1	The last command received is an unsupported AT command.
2	Invalid parameter in the AT command.
3	There is an error when reading or writing the flash memory.
4	There is an error when reading or writing through the IIC bus.
5	There is an error when sending data through the UART port. Check if you exceed 256 bytes UART buffer.
80	The LoRa transceiver is busy, could not process a new command.
81	LoRa service is unknown. Unknown MAC command received by the node. Execute commands that are not supported in the current state, such as sending the at+join command in P2P mode.
82	The LoRa parameters are invalid.
83	The LoRa parameters are invalid.
84	The LoRa data rate (DR) is invalid.
85	The LoRa frequency and data rate are invalid.
86	The device has not joined into a LoRa network.
87	The length of the packet exceeded the maximum allowed by the LoRa protocol.
88	Service is closed by the server. Due to the limitation of duty cycle, the server will send the "SRV_MAC_DUTY_CYCLE_REQ" MAC command to close the service.
89	This is an unsupported region code.
90	The duty cycle is restricted, preventing data transmission at this time. Data can only be sent once the time limit is lifted.
91	No valid LoRa channel could be found.
92	No available LoRa channel could be found.
93	The status indicates an error, which typically signifies that the internal state of the protocol stack is incorrect.
94	Time out reached while sending the packet through the LoRa transceiver.
95	Time out reached while waiting for a packet in the LoRa RX1 window.
96	Time out reached while waiting for a packet in the LoRa RX2 window.
97	There is an error while receiving a packet during the LoRa RX1 window.
98	There is an error while receiving a packet during the LoRa RX2 window.
99	Failed to join into a LoRa network.
100	A duplicate downlink message has been detected, indicating that a message with an invalid downlink count was received.
101	Payload size is not valid for the current data rate (DR).
102	Many downlink packets are lost.
103	Address fail. The address of the received packet does not match the address of the current node.
104	Invalid MIC is detected in the LoRa message.

General AT Command

1. at+version

This command is used to get the current firmware version number.

Operation	Command	Response
Read	at+version	OK <version number>

Parameter: NONE

Example:

at+version\r\n
OK V3.0.0.14.H

2. at+help

This command is used to obtain all the AT commands supported by the current firmware.

Operation	Command	Response
Read	at+help	OK <all AT commands>

Parameter: NONE

Example:

at+help\r\n

OK Device AT commands:

  at+version
  at+help
  at+set_config=device:restart
  at+set_config=device:sleep:X
  at+get_config=device:status
  at+set_config=device:uart:X:Y
  at+set_config=device:uart_mode:X:Y
  at+send=uart:X:YYY
  at+set_config=device:gpio:X:Y
  at+get_config=device:gpio:X
  at+get_config=device:adc:X

LoRaWAN AT commands:

  at+set_config=lora:default_parameters
  at+join
  at+send=lora:X:YYY
  at+set_config=lora:region:XXX
  at+get_config=lora:channel
  at+set_config=lora:dev_eui:XXXX
  at+set_config=lora:app_eui:XXXX
  at+set_config=lora:app_key:XXXX
  at+set_config=lora:dev_addr:XXXX
  at+set_config=lora:apps_key:XXXX
  at+set_config=lora:nwks_key:XXXX
  at+set_config=lora:multicastenable:X
  at+set_config=lora:multicast_dev_addr:XXXX
  at+set_config=lora:multicast_apps_key:XXXX
  at+set_config=lora:multicast_nwks_key:XXXX
  at+set_config=lora:join_mode:X
  at+set_config=lora:work_mode:X
  at+set_config=lora:ch_mask:X:Y
  at+set_config=lora:class:X
  at+set_config=lora:confirm:X
  at+set_config=lora:dr:X
  at+set_config=lora:tx_power:X
  at+set_config=lora:adr:X
  at+get_config=lora:status
  at+set_config=lora:dutycycle_enable:X
  at+set_config=lora:send_repeat_cnt:X

LoRaP2P AT commands:

  at+set_config=lorap2p:XXX:Y:Z:A:B:C
  at+set_config=lorap2p:transfer_mode:X
  at+send=lorap2p:XXX

3. at+set_config=device:restart

This command is used to restart the device.

Operation	Command	Response
Read	at+set_config=device:restart

Parameter: NONE

Example:

at+set_config=device:restart

LoRa (R) is a registered trademark or service mark of Semtech Corporation or its affiliates. LoRaWAN (R) is a licensed mark.

RAK811 Version:3.0.0.14.H
UART1 work mode: RUI_UART_NORMAL, 9600, N81
UART3 work mode: RUI_UART_NORMAL, 115200, N81
LoRa work mode: P2P
LoRa P2P Transfer_mode: Sender
Initialization OK

4. at+set_config=device:sleep:<status>

This command is used to change the current state of the device between the sleep and the wake-up mode.

Operation	Command	Response
Write	at+set_config=device:sleep:<status>	OK<STATUS>

Parameter:

Status

0: wake up 1: sleep

Example:

at+set_config=device:sleep:1\r\n
OK Sleep

at+set_config=device:sleep:0\r\n
OK Wake Up

NOTE

During sleep mode, Pin 5 (RX1) and Pin 1 (RX3) are automatically configured as wake-up pins in external interrupt mode with an internal pull-down resistor. Wake-up is triggered by a rising edge on these RX pins.

5. at+get_config=device:status

This command is used to obtain the current status of the device.

Operation	Command	Response
Read	at+get_config=device:status	OK<information>

Parameter: None

Example:

at+get_config=device:status\r\n
OK Board Core:RAK811
MCU:STM32L151CBU6A
LoRa chip:SX1276

Interface Type AT Command

1. at+set_config=device:uart:<index>:<baud_rate>

This command is used to configure the baud rate for a UART port.

Operation	Command	Response
Write	at+set_config=device:uart:<index>:<baud_rate>	OK

Parameter:

index	UART Number: 1 or 2.
baud_rate	UART Baud rate：1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200

Example:

at+set_config=device:uart:1:115200\r\n

2. at+set_config=device:uart_mode:<index>:<mode>

This command is used to set the UART operation from AT configuration mode to data transmission mode.

In Data Transmission Mode, standard AT Commands are disabled, and any data sent to UART is transmitted directly to the network server as an ASCII payload with \r\n. For example, if you input AZ, the network server will receive an uplink hex value of 415A0D0A, where A=0x41, Z=0x5A, \r=0x0D, and \n=0x0A.

NOTE

To switch back from data transmission mode to configuration mode, use +++ (+++ without \ r\ n).

Operation	Command	Response
Write	at+set_config=device:uart_mode:<index>:<mode>	OK

Parameter:

index	UART Number: 1 or 2.
mode	UART Mode： Only 1 can be selected, which means the UART is set to data transmission mode

Example:

at+set_config=device:uart_mode:1:1\r\n
OK

+++
OK

3. at+send=uart:<index>:<data>

This command is used for sending data over a UART port.

Operation	Command	Response
Write	at+send=uart:<index>:<data>	OK

Parameter:

index	UART Port Number. Currently, the RAK4200 supports UART1 and UART2.
data	The data to be sent can have a maximum length of 250 characters, which is equivalent to 255 minus the length of the at+... command and the \r\n terminators.

Example:

at+send=uart:1:12345\r\n
OK

4. at+get_config=device:gpio:<pin_num>

This command is used to obtain the voltage level status of a pin on a module.

Operation	Command	Response
Read	at+get_config=device:gpio:<pin_num>	OK<status>

Parameter:

pin_num	Pin index of the module (GPIO pins available on this Breakout board are Pin 3, Pin 6, Pin 9, and Pin 10 of the RAK4200 module)
status（Return Value）	0: Low Voltage Level 1: High Voltage Level

Zoom Level:

Figure 1: GPIO Pinout of the RAK4200 Breakout board

Example:

at+get_config=device:gpio:3\r\n
OK 1

5. at+set_config=device:gpio:<pin_num>:<status>

This command is used to set the voltage level state (high or low) of a pin on a board.

Operation	Command	Response
Write	at+set_config=device:gpio:<pin_num>:<status>	OK

Parameter:

pin_num	Pin index of the module (GPIO pins available on this Breakout board are Pin 3, Pin 6, Pin 9, and Pin 10 of the RAK4200 module)
status	0: Low Voltage Level 1: High Voltage Level

Example:

at+set_config=device:gpio:2:0\r\n
OK

6. at+get_config=device:adc:<pin_num>

This command is used to obtain the voltage level of an ADC pin of the board.

Operation	Command	Response
Read	at+get_config=device:adc:<pin_num>	OK<voltage>

Parameter:

pin_num	ADC pin index of the module (ADC pin available on this Breakout board is assigned to Pin 3 of the RAK4200 module)
Voltage（Return Value）	Voltage，Unit: mV

Zoom Level:

Figure 1: ADC Pinout of the RAK4200 Breakout board

Example:

at+get_config=device:adc:3\r\n
OK 1663mV

LoRaWAN Type AT Command

1. at+join

This command is used to join a LoRaWAN network.

Operation	Command	Response
	at+join	OK Join Success

Parameter: NONE

Example:

at+join\r\n
OK Join Success

2. at+send=lora:<port>:<data>

This command is used to send data via LoRaWAN.

Operation	Command	Response
	at+send=lora:<port>:<data>	OK

Parameter:

port	The sending port for LoRa ranges from 1 to 223.
data	The sending data format is in hexadecimal format. The possible values are between 00-FF. The module will internally cast every two characters into a byte before sending it to the LoRa transceiver. The maximum length varies depending on the band frequency and DR (LoRaWAN standard). Refer to Appendix III.

Example:

When sending data as unconfirmed uplink:

at+send=lora:1:5A00\r\n
OK

When sending data as confirmed uplink:

at+send=lora:1:5A00\r\n
OK
at+recv=0,-105,-12,0

NOTE

• When sending a confirmed message, you will receive an ACK response, i.e. at+recv=.... The 0, -105, -12,0 stands for:
  • 0: For the LoRa port;
  • -105: For the RSSI;
  • -12: For the SNR;
  • 0: For the length of the data (no valid data in ACK).

• When sending an unconfirmed message, sometimes the gateway will send MAC commands to nodes, and the node will also receive at+recv=....

3. at+set_config=lora:region:<region>

This command is used for setting the appropriate working frequency band.

Operation	Command	Response
Write	at+set_config=lora:region:<region>	OK

Parameter:

region

EU433, CN470, IN865, EU868, US915, AU915, KR920, AS923. The default is EU868.

Example:

at+set_config=lora:region:EU868\r\n
OK

NOTE

In the AS923 frequency band, the supported frequency plan is **as2"**and dwell is set to 1.

4. at+get_config=lora:channel

This command is used to read all the LoRa channel information given the current region configured on the board.

Operation	Command	Response
Read	at+get_config=lora:channel	OK <channel information>

Parameter: NONE

Example: EU868 region

at+get_config=lora:channel\r\n
OK *0,on,868100000,0,5; *1,on,868300000,0,5; *2,on,868500000,0,5; 3,off,0,0,0; 4,off,0,0,0; 5,off,0,0,0; 6,off,0,0,0; 7,off,0,0,0; *8,on,867100000,0,5; *9,on,867300000,0,5; *10,on,867500000,0,5; *11,on,867700000,0,5; *12,on,867900000,0,5; 13,off,0,0,0; 14,off,0,0,0; 15,off,0,0,0

NOTE

With "*0,on,868100000,0,5" as an example，the following is the channel parameter analysis:

• * at the beginning, if the channel is open;
• 0 is the channel ID;
• on indicates the current status of the channel;
• 868100000 is the actual frequency of the channel，unit is Hz;
• 0,5 indicates the DR of the channel, DR0~DR5.

5. at+set_config=lora:ch_mask:<channel_number>:<status>

This command is used for switching a channel (turn on or off) in the current region.

Operation	Command	Response
Write	at+set_config=lora:ch_mask:<channel_number>:<status>	OK

Parameter:

channel_number	Channel number
status	0: off 1: on

Example:

at+set_config=lora:ch_mask:0:0\r\n
OK

6. at+set_config=lora:dev_eui:<dev_eui>

This command is used to set the Device EUI parameter for the LoRaWAN OTAA mode.

Operation	Command	Response
Write	at+set_config=lora:dev_eui:<dev_eui>	OK

Parameter:

dev_eui

Device EUI

Example:

at+set_config=lora:dev_eui:3530353064377716\r\n
OK

7. at+set_config=lora:app_eui:<app_eui>

This command is used to set the Application EUI parameter for the LoRaWAN OTAA mode.

Operation	Command	Response
Write	at+set_config=lora:app_eui:<app_eui>	OK

Parameter:

app_eui

Application EUI

NOTE

All zero value Application EUI at+set_config=lora:app_eui:0000000000000000 is not supported and will return error.

Example:

at+set_config=lora:app_eui:0000000000000001\r\n
OK

8. at+set_config=lora:app_key:<app_key>

This command is used to set the Application Key parameter for the LoRaWAN OTAA mode.

Operation	Command	Response
Write	at+set_config=lora:app_key:<app_key>	OK

Parameter:

app_key

Application Key

Example:

at+set_config=lora:app_key:841986913ACD00BBC2BE2479D70F3228\r\n
OK

9. at+set_config=lora:dev_addr:<dev_addr>

This command is used to set the Device Address parameter for the LoRaWAN ABP mode.

Operation	Command	Response
Write	at+set_config=lora:dev_addr:<dev_addr>	OK

Parameter:

dev_addr

Device Address

Example:

at+set_config=lora:dev_addr:260125D7\r\n
OK

10. at+set_config=lora:apps_key:<apps_key>

This command is used to set the Application Session Key parameter for the LoRaWAN ABP mode.

Operation	Command	Response
Write	at+set_config=lora:apps_key:<apps_key>	OK

Parameter:

apps_key

Application Session Key

Example:

at+set_config=lora:apps_key:841986913ACD00BBC2BE2479D70F3228\r\n
OK

11. at+set_config=lora:nwks_key:<nwks_key>

This command is used to set the Network Session Key parameter for the LoRaWAN ABP mode.

Operation	Command	Response
Read	at+set_config=lora:nwks_key:<nwks_key>	OK

Parameter:

nwks_key

Network Session Key

Example:

at+set_config=lora:nwks_key:69AF20AEA26C01B243945A28C9172B42\r\n
OK

12. at+set_config=lora:multicastenable:<IsEnable>

Operation	Command	Response
Write	at+set_config=lora:multicastenable:<IsEnable>	OK

Parameter:

IsEnable

0: disable 1: enable The default is disable.

Example:

at+set_config=lora:multicastenable:1\r\n
OK

13. at+set_config=lora:multicast_dev_addr:<multicast_dev_addr>

This command is used for setting the Device Address for the multicast feature.

Operation	Command	Response
Write	at+set_config=lora:multicast_dev_addr:<multicast_dev_addr>	OK

Parameter:

multicast_dev_addr

Multicast Device Address

Example:

at+set_config=lora:multicast_dev_addr:260111fd\r\n
OK

14. at+set_config=lora:multicast_apps_key:<multicast_apps_key>

This command is used to set the Application Session Key for the multicast feature.

Operation	Command	Response
Write	at+set_config=lora:multicast_apps_key:<multicast_apps_key>	OK

Parameter:

multicast_app_addr

Multicast Application Session Key

Example:

at+set_config=lora:multicast_apps_key:F13DDFA2619B10411F02F042E1C0F356\r\n
OK

15. at+set_config=lora:multicast_nwks_key:<multicast_nwks_key>

This command is used to set the Network Session Key for the multicast feature.

Operation	Command	Response
Write	at+set_config=lora:multicast_nwks_key:<multicast_nwks_key>	OK

Parameter:

multicast_nwks_key

Multicast Network Session Key

Example:

at+set_config=lora:multicast_nwks_key:1D1991F5377C675879C39B6908D437A6\r\n
OK

16. at+set_config=lora:join_mode:<mode>

This command is used to switch the LoRaWAN access mode between the OTAA and the ABP mode.

Operation	Command	Response
Write	at+set_config=lora:join_mode:<mode>	OK

Parameter:

mode	Activation mode 0: OTAA 1: ABP The default is OTAA.

Example:

at+set_config=lora:join_mode:1\r\n
OK

17. at+set_config=lora:class:<class>

This command is used to set LoRaWAN class to Class A, Class B, or Class C.

Operation	Command	Response
Write	at+set_config=lora:class:<class>	OK

Parameter:

class

0: Class A 1: Class B （Not supported at this time） 2: Class C The default is Class A.

Example:

at+set_config=lora:class:0\r\n
OK

18. at+set_config=lora:confirm:<type>

This command is used for setting the type of messages to be sent: Confirmed/Unconfirmed.

Operation	Command	Response
Write	at+set_config=lora:confirm:<type>	OK

Parameter:

type	0: unconfirm type 1: confirm type The default is unconfirm type.

Example:

at+set_config=lora:confirm:0\r\n
OK

19. at+set_config=lora:dr:<dr>

This command is used to set the data rate (DR) of LoRa.

Operation	Command	Response
Write	at+set_config=lora:dr:<dr>	OK

Parameter:

dr	The LoRa data rate is region-specific. In most LoRa regions, data rates typically range from 0 to 5. For detailed information, refer to the LoRaWAN 1.0.2 specification.

20. at+set_config=lora:tx_power:<tx_power>

This command is used to set the RF transmission power level of the LoRa transceiver.

Operation	Command	Response
Write	at+set_config=lora:tx_power:<tx_power>	OK

Parameter:

tx_power

Refer to Appendix II for possible values of tx_power. The table of Appendix II is based on LoRaWAN 1.0.2 specification. LoRa transmit power level varies depending on frequency band. If the resulting TX power is higher than the capability of LoRa Radio, the output power will be based on the max TX power of the LoRa Radio in the module. For RAK811 module, the max TX power is 20dBm. Take note of this when using regional bands with MaxEIRP higher than 20dBm like US915, AU915 and IN865 whose MaxEIRP is 30dBm. The default setting is 0.

Example:

at+set_config=lora:tx_power:0\r\n
OK

21. at+set_config=lora:adr:<status>

This command is used to turn on/off the ADR feature of the LoRa communication.

Operation	Command	Response
Write	at+set_config=lora:adr:<status>	OK

Parameter:

status

0: Turn off 1: Turn on The default is on.

Example:

at+set_config=lora:adr:0\r\n
OK

22. at+get_config=lora:status

This command is used to get all the information related to the current LoRa status, except the channel information.

Operation	Command	Response
Read	at+get_config=lora:status	OK <lora status detail>

Parameter: NONE

Example:

at+get_config=lora:status\r\n
OK Work Mode: LoRaWAN
Region: EU868
Send_interval: 600s
Auto send status: false.
MulticastEnable: true.
Multi_Dev_Addr: 260111FD
Multi_Apps_Key: F13DDFA2619B10411F02F042E1C0F356
Multi_Nwks_Key: 1D1991F5377C675879C39B6908D437A6
Join_mode: OTAA
DevEui: 0000000000000888
AppEui: 0000000000000888
AppKey: 00000000000008880000000000000888
Class: C
Joined Network:false
IsConfirm: unconfirm
AdrEnable: true
EnableRepeaterSupport: false
RX2_CHANNEL_FREQUENCY: 869525000, RX2_CHANNEL_DR:0
RX_WINDOW_DURATION: 3000ms
RECEIVE_DELAY_1: 1000ms
RECEIVE_DELAY_2: 2000ms
JOIN_ACCEPT_DELAY_1: 5000ms
JOIN_ACCEPT_DELAY_2: 6000ms
Current Datarate: 4
Primeval Datarate: 4
ChannelsTxPower: 0
UpLinkCounter: 0
DownLinkCounter: 0

23. at+set_config=lora:dutycycle_enable:<status>

This command is used to enable or disable the Duty Cycle feature.

Operation	Command	Response
Write	at+set_config=lora:dutycycle_enable:<status>	OK

Parameter:

status

0: disable 1: enable The default is disable.

Example:

at+set_config=lora:dutycycle_enable:1\r\n
OK

24. at+set_config=lora: send_repeat_cnt:<num>

This command sets the number of retransmission attempts for an uplink message. When enabled, the board will resend a message if the corresponding ACK (downlink) is not received after sending a confirmed uplink message. The default value is 0, meaning the board will not resend any messages by default.

Operation	Command	Response
Write	at+set_config=lora: send_repeat_cnt:<num>	OK

Parameter:

num	Number of retries, up to 8. The default is 0.

Example:

at+set_config=lora:send_repeat_cnt:1\r\n
OK

25. at+set_config=lora:default_parameters

This command is used to restore OTAA, ABP, multicast related network access parameters set at the factory, including dev_eui，app_eui, etc.

Operation	Command	Response
Write	at+set_config=lora:default_parameters	OK

Parameter: NONE

Example:

at+set_config=lora:default_parameters\r\n
OK

LoRa P2P Type AT Command

1. at+set_config=lora:work_mode:<mode>

This command is used to switch the LoRa operating mode between LoRaWAN and LoRa P2P modes. Executing this command will cause the module to restart.

Operation	Command	Response
Write	at+set_config=lora:work_mode:<mode>

Parameter:

mode	Work mode of LoRa 0: LoRaWAN 1: LoRa P2P The default is LoRaWAN mode.

Example：

at+set_config=lora:work_mode:1\r\n
UART1 work mode: RUI_UART_NORMAL
Current work_mode:P2P
Initialization OK

2. at+set_config=lorap2p:<frequency>:<spreadfact>:<bandwidth>:<codingrate>:<preamlen>:<power>

This command is used to set the relevant parameters of LoRa P2P mode and is only valid when the LoRa mode is switched to LoRa P2P before.

Operation	Command	Response
Write	at+set_config=lorap2p:<frequency>:<spreadfact>:<bandwidth>:<codingrate>:<preamlen>:<power>	OK

Parameter:

frequency	Frequency, the unit is Hz The default is 869525000 Hz.
spreadfact	Spreading factor The default is 12.
bandwidth	0: 125 kHz 1: 250 kHz 2: 500 kHz The default is 0.
codingrate	1: 4/5 2: 4/6 3: 4/7 4: 4/8 The default is 1.
preamble	Preamble Length. 5~65535 The default is 8.
power	TX power. The unit is in dBm. 5~20 The default is 20.

Example：

at+set_config=lorap2p:869525000:12:0:1:8:20\r\n
OK

3. at+set_config=lorap2p:transfer_mode:<mode>

This command is used to switch the state of the LoRa transceiver between sending and receiving state, and it is only valid when the LoRa mode is set to LoRa P2P before.

Operation	Command	Response
Write	at+set_config=lorap2p: transfer_mode:<mode>	OK

Parameter：

mode	1: receiver mode 2: sender mode The default is sender mode.

Example：

at+set_config=lorap2p:transfer_mode:1\r\n
OK

4. at+send=lorap2p:<data>

This command is used to send data through LoRa P2P and is only valid when the LoRa work mode is set to LoRa P2P before.

Operation	Command	Response
Send	at+send=lorap2p:<data>	OK

Parameter：

data	The data to be sent, and the format is hexadecimal.

Example：

at+send=lorap2p:1234\r\n
OK

In LoRa P2P mode, the receiving node receives the data and outputs the data in the following format:

at+recv=<RSSI>,<SNR>,<Data Length>:<Data>

Appendix

Appendix I: Data Rate by Region

EU868/EU433/AS923

Data Rate	Configuration	Indicative Physical Bit Rate [bit/s]
0	LoRa: SF12 / 125 kHz	250
1	LoRa: SF11 / 125 kHz	440
2	LoRa: SF10 / 125 kHz	980
3	LoRa: SF9 / 125 kHz	1760
4	LoRa: SF8 / 125 kHz	3125
5	LoRa: SF7 / 125 kHz	5470
6	LoRa: SF7 / 250 kHz	11000
7	FSK: 50 kbps	50000
8 ~ 15	RFU

CN470/KR920

Data Rate	Configuration	Indicative Physical Bit Rate [bit/s]
0	LoRa: SF12 / 125 kHz	250
1	LoRa: SF11 / 125 kHz	440
2	LoRa: SF10 / 125 kHz	980
3	LoRa: SF9 / 125 kHz	1760
4	LoRa: SF8 / 125 kHz	3125
5	LoRa: SF7 / 125 kHz	5470
6 ~ 15	RFU

US915

Data Rate	Configuration	Indicative Physical Bit Rate [bit/s]
0	LoRa: SF10 / 125 kHz	980
1	LoRa: SF9 / 125 kHz	1760
2	LoRa: SF8 / 125 kHz	3125
3	LoRa: SF7 / 125 kHz	5470
4	LoRa: SF8 / 500 kHz	12500
5 ~ 7	RFU
8	LoRa: SF12 / 500 kHz	980
9	LoRa: SF11 / 500 kHz	1760
10	LoRa: SF10 / 500 kHz	3900
11	LoRa: SF9 / 500 kHz	7000
12	LoRa: SF8 / 500 kHz	12500
13	LoRa: SF7 / 500 kHz	21900
14 ~ 15	RFU

AU915

Data Rate	Configuration	Indicative Physical Bit Rate [bit/s]
0	LoRa: SF12 / 125 kHz	250
1	LoRa: SF11 / 125 kHz	440
2	LoRa: SF10 / 125 kHz	980
3	LoRa: SF9 / 125 kHz	1760
4	LoRa: SF8 / 125 kHz	3125
5	LoRa: SF7 / 125 kHz	5470
6	LoRa: SF8 / 500 kHz	12500
7	RFU	RFU
8	LoRa: SF12 / 500 kHz	980
9	LoRa: SF11 / 500 kHz	1760
10	LoRa: SF10 / 500 kHz	3900
11	LoRa: SF9 / 500 kHz	7000
12	LoRa: SF8 / 500 kHz	12500

IN865

Data Rate	Configuration	Indicative Physical Bit Rate [bit/s]
0	LoRa: SF12 / 125 kHz	250
1	LoRa: SF11 / 125 kHz	440
2	LoRa: SF10 / 125 kHz	980
3	LoRa: SF9 / 125 kHz	1760
4	LoRa: SF8 / 125 kHz	3125
5	LoRa: SF7 / 125 kHz	5470
6	RFU	RFU
7	FSK: 50 kbps	50000
8 ~ 15	RFU	RFU

Appendix II: TX Power by Region

EU868

By default, MaxEIRP is considered to be +16 dBm.

TXPower	Configuration (EIRP)
0	MaxEIRP
1	MaxEIRP - 2 dB
2	MaxEIRP - 4 dB
3	MaxEIRP - 6 dB
4	MaxEIRP - 8 dB
5	MaxEIRP - 10 dB
6	MaxEIRP - 12 dB
7	MaxEIRP - 14 dB
8 ~ 15	RFU

US915

By default, MaxEIRP is considered to be +30 dBm based on LoRa Alliance specification. However, the module's max TX power is only up to 20dBm.

TXPower	Configuration (Conducted Power)
0	MaxEIRP
1	MaxEIRP - 2 dB
2	MaxEIRP - 4 dB
3 ~ 9	-
10	10 dBm
11 ~ 15	RFU

AU915

By default, MaxEIRP is considered to be +30 dBm based on LoRa Alliance specification. However, the module's max TX power is only up to 20 dBm.

TXPower	Configuration (EIRP)
0	MaxEIRP
1 ~ 10	MaxEIRP - 2*TXPower
11 ~ 15	RFU

KR920

By default, MaxEIRP is considered to be +14 dBm.

TXPower	Configuration (EIRP)
0	MaxEIRP
1	MaxEIRP - 2 dB
2	MaxEIRP - 4 dB
3	MaxEIRP - 6 dB
4	MaxEIRP - 8 dB
5	MaxEIRP - 10 dB
6	MaxEIRP - 12 dB
7	MaxEIRP - 14 dB
8 ~ 15	RFU

AS923

By default, Max EIRP is considered to be 16 dBm.

TXPower	Configuration (EIRP)
0	MaxEIRP
1	MaxEIRP - 2 dB
2	MaxEIRP - 4 dB
3	MaxEIRP - 6 dB
4	MaxEIRP - 8 dB
5	MaxEIRP - 10 dB
6	MaxEIRP - 12 dB
7	MaxEIRP - 14 dB
8 ~ 15	RFU

IN865

By default, MaxEIRP is considered to be +30 dBm based on LoRa Alliance specification. However, the module's max TX power is only up to 20 dBm.

TXPower	Configuration (EIRP)
0	MaxEIRP
1	MaxEIRP - 2 dB
2	MaxEIRP - 4 dB
3	MaxEIRP - 6 dB
4	MaxEIRP - 8 dB
5	MaxEIRP - 10 dB
6	MaxEIRP - 12 dB
7	MaxEIRP - 14 dB
8	MaxEIRP - 16 dB
9	MaxEIRP - 18 dB
10	MaxEIRP - 20 dB
11 ~ 15	RFU

CN470

By default, MaxEIRP is considered to be +19.15 dBm.

TXPower	Configuration (EIRP)
0	MaxEIRP
1	MaxEIRP - 2 dB
2	MaxEIRP - 4 dB
3	MaxEIRP - 6 dB
4	MaxEIRP - 8 dB
5	MaxEIRP - 10 dB
6	MaxEIRP - 12 dB
7	MaxEIRP - 14 dB
8 ~ 15	RFU

EU433

By default, MAxEIRP is considered to be +12.15 dBm.

TXPower	Configuration (EIRP)
0	MaxEIRP
1	MaxEIRP - 2 dB
2	MaxEIRP - 4 dB
3	MaxEIRP - 6 dB
4	MaxEIRP - 8 dB
5	MaxEIRP - 10 dB
6 ~ 15	RFU

Appendix III: Maximum Transmission Load by Region

NOTE

The LoRaWAN stack adds 8 bytes to the user payload. In the following list, M is the maximum payload size and N is the maximum usable payload size for the user data without the MAC header.

EU868

DataRate	M	N
0	59	51
1	59	51
2	59	51
3	123	115
4	250	242
5	250	242
6	250	242
7	250	242
8 ~ 15	Not Defined	Not Defined

US915

DataRate	M	N
0	19	11
1	61	53
2	133	125
3	250	242
4	250	242
5 ~ 7	Not Defined	Not Defined
8	61	53
9	137	129
10	250	242
11	250	242
12	250	242
13	250	242
14 ~ 15	Not Defined	Not Defined

AU915

DataRate	M	N
0	59	51
1	59	51
2	59	51
3	123	115
4	250	242
5	250	242
6	250	242
7	Not Defined	Not Defined
8	61	53
9	137	129
10	250	242
11	250	242
12	250	242
13	250	242
14 ~ 15	Not Defined	Not Defined

KR920

DataRate	M	N
0	59	51
1	59	51
2	59	51
3	123	115
4	250	242
5	250	242
6 ~ 15	Not Defined	Not Defined

AS923

DataRate	Uplink MAC Payload Size (M)		Downlink MAC Payload Size (M)
	UplinkDwellTime = 0	UplinkDwellTime = 1	DownlinkDwellTime = 0	DownlinkDwellTime = 1
0	59	N/A	59	N/A
1	59	N/A	59	N/A
2	59	19	59	19
3	123	61	123	61
4	250	133	250	133
5	250	250	250	250
6	250	250	250	250
7	250	250	250	250
8 ~ 15	RFU		RFU

IN865

DataRate	M	N
0	59	51
1	59	51
2	59	51
3	123	115
4	250	242
5	250	242
6	250	242
7	250	242
8 ~ 15	Not Defined	Not Defined

CN470

DataRate	M	N
0	59	51
1	59	51
2	59	51
3	123	115
4	250	242
5	250	242
6 ~ 15	Not Defined	Not Defined

EU433

DataRate	M	N
0	59	51
1	59	51
2	59	51
3	123	115
4	250	242
5	250	242
6	250	242
7	250	242
8 ~ 15	Not Defined	Not Defined

Appendix IV: Pin Description of RAK4200 Breakout Board

The pin definition of the RAK4200 Breakout Board can be reviewed in the Pin Definition section of the Datasheet.

Here is a summary of the pins on the RAK4200 Breakout Board:

NOTE

Not all pins of the RAK811 module are exposed on the RAK4200 Breakout board header connectors. Below are the pins available on the RAK811 Module that is on this Breakout board. For complete RAK811 module pinouts information, refer to the datasheet.

1. UART Pins:

   • Pin 5 (RX1) and Pin 4 (TX1) are reserved for UART1.
   • Pin 1 (RX2) and Pin 2 (TX2) are reserved for UART2.
   • During sleep, Pin 5 (RX1) and Pin 1 (RX2) are automatically configured as wake-up pins and in external interrupt mode with an internal pull-down resistor. Wake-up will be triggered by a rising edge on these RX pins.

2. SWD Debug Pins: Pin 7 (SWDIO) and Pin 8 (SWCLK) are used for SWD debug port.

3. ower Pins: The power pins on the RAK4200 module include VDD on Pin 20 and Ground pins (GND) are on Pin 11, Pin 13, Pin 14, and Pin 19.

4. Reset Pin: The reset pin on the RAK4200 module is Pin 18 (MCU_NRST).

5. RF Antenna Pin: The RF antenna pin on the RAK4200 module is the Pin 12.

6. ADC Pins: The ADC pin on the RAK4200 module is assigned to Pin 3 (UART2_DE).

7. GPIO pins: The GPIO pins available on the RAK4200 module are the following:

   • Pin 3 (UART2_DE)
   • Pin 6 (UART1_DE)
   • Pin 9 (I2C_SCL)
   • Pin 10 (I2C_SDA)