STMicroelectronicsS GS-HF1 LoRa HF band gateway User Manual
STMicroelectronics LoRa HF band gateway Users Manual
Users Manual
ST Nucleo LoRa GW User Guide
RisingHF
Document information
Info
Content
Keywords
RisingHF, ST, Loriot, LoRa, Gateway, Nucleo
Abstract
This document describes how to use ST Nucleo F7 LoRa
Gateway to connect to Loriot server or others similar server
which support packet forwarder mode.
ST Nucleo LoRa GW_US915 User Guide
V2.7
LRWAN_GS_HF1
ST Nucleo LoRa GW User Guide
RisingHF
Content
Content .................................................................................................................................................. 2
1 Introduction ......................................................................................................................................... 1
2 Features ............................................................................................................................................. 2
3 System description ............................................................................................................................. 3
3.1 Nucleo-F746ZG Board ................................................................................................................. 3
3.2 ST Nucleo LoRa GW Module ....................................................................................................... 4
3.2.1 Pin description ....................................................................................................................... 4
3.2.2 HW architecture of ST Nucleo LoRa GW Module ................................................................... 5
4 System setup ...................................................................................................................................... 6
4.1 Hardware connection ................................................................................................................... 6
4.2 FW download ............................................................................................................................... 6
4.3 Get Started ................................................................................................................................... 7
4.4 Register Sensor Mote ................................................................................................................... 8
4.5 Cautions ....................................................................................................................................... 8
5 AT Command.................................................................................................................................... 10
5.1 Rules .......................................................................................................................................... 10
5.2 Symbols ..................................................................................................................................... 10
5.3 Format ........................................................................................................................................ 10
5.3.1 Query ................................................................................................................................... 10
5.3.2 Configure / Control ............................................................................................................... 10
5.3.3 Return .................................................................................................................................. 10
5.4 Commands List .......................................................................................................................... 11
5.5 Error Code .................................................................................................................................. 11
5.6 Commands ................................................................................................................................. 12
5.6.1 AT ........................................................................................................................................ 12
5.6.2 HELP ................................................................................................................................... 12
5.6.3 FDEFAULT .......................................................................................................................... 13
5.6.4 RESET ................................................................................................................................. 13
5.6.5 SYS ..................................................................................................................................... 14
5.6.6 VER ..................................................................................................................................... 14
5.6.7 LOG ..................................................................................................................................... 14
5.6.8 ECHO .................................................................................................................................. 14
ST Nucleo LoRa GW User Guide
RisingHF
5.6.9 MAC..................................................................................................................................... 15
5.6.10 IP ....................................................................................................................................... 15
5.6.11 DNS ................................................................................................................................... 15
5.6.12 NTP ................................................................................................................................... 16
5.6.13 EUI..................................................................................................................................... 16
5.6.14 LORAWAN ......................................................................................................................... 16
5.6.15 PKTFWD............................................................................................................................ 17
5.6.16 CH ..................................................................................................................................... 18
5.6.17 Baudrate ............................................................................................................................ 19
5.7 Button ......................................................................................................................................... 19
6 Demo Page ....................................................................................................................................... 20
7 Others information for reference ....................................................................................................... 21
7.1 Power supply and consumption .................................................................................................. 21
7.1.1 Power supply ....................................................................................................................... 21
7.1.2 Power consumption ............................................................................................................. 22
7.2 LED status .................................................................................................................................. 22
7.3 RF performance measurement ................................................................................................... 23
8 Reference documents ....................................................................................................................... 24
Revision ............................................................................................................................................... 25
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1 Introduction
The ST Nucleo LoRa GW is a kit based on Nucleo-F746ZG Board and ST Nucleo LoRa GW Module
which is designed by RisingHF (www.risinghf.com). The ST Nucleo LoRa GW Module includes the high
performance LoRa baseband processor SX1301 from Semtech corporation. With Loriot
(https://www.loriot.io/) LoRaWAN cloud server or others server with packet forward service, it provides
support bidirectional communication with end devices in both Class A and Class C of LoRaWAN
protocol, and complete compliant with the LoRaWAN™ specifications V1.0.2.
This document describes how to setup a LoRaWAN GW based on the ST Nucleo LoRa GW and Loriot
Cloud server.
Figure 1-1 ST Nucleo LoRa GW
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2 Features
ST Nucleo LoRa GW – HF: Cover 915MHz for US and Asia;
Programmable parallel demodulation paths;
LoRa demodulators and 1 GFSK demodulator embedded;
Automatic adaptive to spreading factor from SF12 to SF7 in each of 8 channels;
High performance:
-140dBm sensitivity @300bps ;
6dBm max output power without PA;
Single +5V supply;
Support LoRaWAN protocol, Class A and Class C;
Support Loriot Cloud Server;
Support Semtech Packet forwarder;
Support DNS;
Support NTP;
AT command interface to re-configure the parameters of the GW;
--change frequency plan;
--change IP of the GW;
--change MAC address of the GW;
--change Cloud server which support packet forwarder;
--to support public server or private server;
--change DNS address;
--change NTP server address;
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3 System description
The ST Nucleo LoRa GW is composed of two boards:
⚫ Nucleo-F746ZG Board
⚫ ST Nucleo LoRa GW Module
Figure 3-1 Nucleo F7 board and LoRa GW module
3.1 Nucleo-F746ZG Board
Information about the STM32 Nucleo board is available on www.st.com .
The NUCLEO-F746ZG board embeds an STM32F746ZG MCU, ARM® 32-bit Cortex®-M7 CPU with
FPU, adaptive real-time accelerator (ART Accelerator™) and L1-cache: 4KB data cache and 4KB
instruction cache, allowing 0-wait state execution from embedded Flash memory and external
memories, frequency up to 216 MHz, MPU, 462 DMIPS/2.14 DMIPS/MHz (Dhrystone 2.1), and DSP
instructions.
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3.2 ST Nucleo LoRa GW Module
3.2.1 Pin description
Figure 3-2 Pin description of ST Nucleo LoRa GW Module
Table 3-1 Pin description of ST Nucleo LoRa GW Module
PIN NAME
PIN Description
VIN
Power supply to Nucleo-F746ZG Board from External 5V
PF5/PD12/PC4/PB9
-GPIO4
GPIO4 from SX1301
PF10/PD13/PC5/PB8
-GPIO3
GPIO3 from SX1301
PF15-GPIO2
GPIO2 from SX1301
PF14-GPIO1
GPIO1 from SX1301
PF13-GPIO0
GPIO0 from SX1301
PE11-CSN
CSN of SPI for SX1301
PE13-MISO
MISO of SPI for SX1301
PE12-SCK
SCK of SPI for SX1301
VIN
PE12 –SCK
PE14 – MOSI
PF12 – RST
ANT Connector
USB for External 5V supply
PA5 – SCK (opt)
PA6 – MISO (opt)
PA7 – MOSI (opt)
PD14 – CSN (opt)
PF5 – GPIO4
PF10 – GPIO3
PD15 – Band Set1
PF15 – GPIO2
PF13 – GPIO0
PF14 – GPIO1
PE13 – MISO
PE11 – CSN
PE9 – Band Set2
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PE14-MOSI
MOSI of SPI for SX1301
PE15-RST
Reset for SX1301
PD15-Band Set1
ST Nucleo LoRa GW LF
PE9=0, PD15=1: Band EU433
PE9=1, PD15=0: Band CN470
ST Nucleo LoRa GW HF
PE9=0, PD15=1: Band EU868
PE9=1, PD15=0: Band US915/AS915/AU915
PE9-Band Set2
PA5-SCK (opt)
Backup SCK of SPI for SX1301 (NO connection on board in default)
PA6-MISO (opt)
Backup MISO of SPI for SX1301 (NO connection on board in default)
PA7/PB5-MOSI (opt)
Backup MOSI of SPI for SX1301 (NO connection on board in default)
PD14-CSN(opt)
Backup CSN of SPI for SX1301 (NO connection on board in default)
3.2.2 HW architecture of ST Nucleo LoRa GW Module
The Module is composed of one pcs of SX1301 and two pcs of SX125x FEM. The SX1301 will be
controlled and configured by ST Nucleo-F746ZG board via SPI. In this module, the external PA is
removed refer to Semtech’s reference design. The maximum output power will decrease to be about
6dBm for downlink. To get a wider operation bandwidth for evaluation, two parallel SAWs will be used
instead of the single band SAW. Two RF switches are used to select the target band which would be
used in the application. And the band selection is done automatically by software with frequency
channel identification. Users no need to set it by manual.
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4 System setup
4.1 Hardware connection
Use a 5V 1A adapter to connect to the ST Nucleo LoRa GW Module on the top to power the
system
Connect the micro USB connector CN1 of the Nucleo board on the bottom to PC with a USB cable.
This USB port could be used as FW download port or as Virtual COM port for message monitor or
log checking.
Figure 4-1 System setup
4.2 FW download
Below firmware is included in this package. You could download them in www.st.com.
◼ st-nucleo-lora-gw-at-fw-v2.0.2.bin //EU868 by default //
For the first time you get the kit, there will be a default configuration like below:
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Restarting...
Ethernet started
_/_/_/ _/_/_/ _/_/_/ _/_/_/ _/ _/ _/_/_/ _/ _/ _/_/_/
_/ _/ _/ _/ _/ _/_/ _/ _/ _/ _/ _/
_/_/_/ _/ _/_/ _/ _/ _/ _/ _/ _/_/ _/_/_/_/ _/_/_/
_/ _/ _/ _/ _/ _/ _/_/ _/ _/ _/ _/ _/
_/ _/ _/_/_/ _/_/_/ _/_/_/ _/ _/ _/_/_/ _/ _/ _/
Powered by RisingHF & STMicroelectronics
-------------------------------------------------------------------------------
Power Supply
COM
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VERSION: 2.0.2, Dec 6 2016
LOG: OFF
AT ECHO: ON
BAUDRATE: 115200bps
MACADDR: 08:00:27:0A:48:3B
ETHERNET: DHCP
DNS1: 114.114.114.114
DNS2: 8.8.8.8
NTP SERVER: 1.ubuntu.pool.ntp.org
EUI PADDING: {3, FF}, {4, FF}
GATEWAY ID: 080027FFFF0A483B
LORAWAN: Public
LORAWAN SERVER: ap1.loriot.io
UPLINK UDP PORT: 1780
DOWNLINK UDP PORT: 1780
-------------------------------------------------------------------------------
Concentrator starting...
Concentrator Radio A type SX1257
Concentrator Radio B type SX1257
Concentrator started (2926ms)
Ethernet starting...
Ethernet started
DHCP IP: 192.168.0.118
Downlink UDP Connected
Uplink UDP Connected
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
If you want to upgrade to a new firmware, please follow step below:
1) Connect ST Nucleo F746ZG to PC, then a mass storage device could be recognized.
2) Drag the target bin file and drop to the “NODE_F746ZG” device. When it is done, the firmware is
programmed successfully.
4.3 Get Started
1. Set up the system and connect the hardware like Figure 4-1.
2. Program the GW with the right binary file with right frequency plan and right cloud server. Skip this
step if the default configuration is acceptable for you.
3. Check Log with extraputty or some similar tools. Power up the system and reset the Nucleo board.
The log with some useful information will be shown on window of the extraputty. Configuration is
“115200, 8, n, 1”.
Figure 4-2 log shown after reset Nucleo board
Some useful information needs to be known from this log, MAC Address, predefined channels and
server address. All these configurations are configurable by user through AT command.
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4. Register the GW to Loriot server with right MAC address. You need register an account first on the
server before adding the GW. Please refer to step below for the details.
For example, the MAC address is “08:00:27:xx:xx:xx”. Use below procedure to register gateway:
(1) Log in to http://ap1.loriot.io server. If you want to connect to other server of Loriot, please
change the server address.
(2) Dashboard -> Gateway -> Add Gateway
(3) Choose “Semtech Packet Forwarder”
(4) Fill in the MAC address “08:00:27:xx:xx:xx”
(5) Fill in the gateway location
(6) Finish registration
5. Reset the GW. The ST Nucleo LoRa GW would connect to the server now.
4.4 Register Sensor Mote
Due to this document date, Loriot packet forwarder mode could support all the function, like uplink and
downlink, ABP and OTAA mode, Class A and Class C LoRaWAN and so on.
Step below is an example to show how to register a device in ABP mode.
1. Dashboard -> Application -> SampleApp -> Manage devices.
2. Import Existing ABP
3. Fill in all necessary information includes DEVADDR, DEVEUI, APPSKEY, NWKSKEY, FCntUp,
FCntDown.
Note: If you don’t want that your device follow the strict sequence number checking rule, you could
choose relaxed one to neglect it.
Figure 4-3 Change seqno checking to be relaxed if need
4.5 Cautions
For US915 frequency band, only US1 server of Loriot can support, for customers who need use US915
frequency band, please switch to us1.loriot.io. us1.loriot.io -915.bin firmware enables US915 Hybrid
mode, CH0~7 are selected as the communication channels. Once your gateway is registered, please
switch frequency plan to US915_CH0_7.
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Figure 4-4 Frequency plan for US915 selection on Loriot server
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5 AT Command
5.1 Rules
▪ New configuration will be effected after restart;
▪ All commands are case insensitive;
▪ All commands have response;
▪ Command length never exceeds total 528 characters;
▪ One valid AT Command must end with '\n' or '\r'
▪ <LF> means the newline character. <CR> means carriage return;
▪ UART configuration "115200, 8, n 1" (8 bits data, no parity, 1 stop bit);
5.2 Symbols
▪ = --> Set value for command
▪ ? --> Query
▪ : --> Start a list input parameter
▪ + --> Prefix of command
▪ , --> Separator of parameters
▪ Space --> Empty character, could be used to format command
NOTE: Use quote sign < " > to force input parameter with space
5.3 Format
All commands in this document are end with <CR><LF>. In order to facilitate the description, all
<CR><LF> is intentionally omitted in this document.
5.3.1 Query
Use query command to check LoRaWAN modem configuration, such as channel configuration, ADR
status, TX power, etc.
AT+COMMAND
AT+COMMAND?
AT+COMMAND=?
NOTE: Query format is available with every LoRaWAN supported command
5.3.2 Configure / Control
Uses configure/control command to set new configuration or control transaction.
AT+COMMAND=PARA0,PARA1,...,PARAx
5.3.3 Return
Return data is in format like "+CMD: DATA"
+COMMAND: DATA
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5.4 Commands List
Table 5-1 Command List
Command
Comment
AT
Return "+OK"
HELP
Print help information
FDEFAULT
Reset to factory default settings
RESET
Software reset gateway
SYS
Check all configurations
VER
Get version
LOG
Turn on/off packet forwarder log
ECHO
AT command echo on/off
MAC
Set/Get gateway MAC Address
IP
DHCP/STATIC IP control
DNS
Set/Get DNS address
NTP
Set/Get NTP server address
EUI
MAC Address (EUI48) to Gateway ID (EUI64) padding
LORAWAN
LoRaWAN network selection (public / private)
PKTFWD
Packet forwarder server address and port setttings
CH
Packet forwarder channels
Baudrate
AT command and logging UART interface baud rate
5.5 Error Code
Table 5-2 Error code description for AT command
ERROR
Description
-1
Command format unknown, must be one of below formats:
AT+CMD
AT+CMD?
AT+CMD=?
AT+CMD=para0,para1,para2
-2
Unknown command, the command is not supported
-3
The number of parameters is not expected
-4
Invalid parameter
-5
Illegal character received
-6
Command is too long
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5.6 Commands
5.6.1 AT
Use to test if connection of module is OK. This is a dummy command is just like other common "AT
modules"
Format:
AT
Return:
+AT: OK
5.6.2 HELP
Return brief help information.
Format:
AT+HELP
Return:
+HELP: OK
AT -- AT Ping
HELP -- Print command list
-> AT+HELP
FDEFAULT -- Restore factory default
-> AT+FDEFAULT
RESET -- Reset gateway
-> AT+RESET
SYS -- Check device configuration
-> AT+SYS
VER -- Version
-> AT+VER
LOG -- Logging
-> AT+LOG
-> AT+LOG=ON
-> AT+LOG=OFF
ECHO -- AT echo on/ff
-> AT+ECHO
-> AT+ECHO=ON
-> AT+ECHO=OFF
MAC -- MAC address
-> AT+MAC
-> AT+MAC=mac_address
IP -- Gateway DHCP/STATIC ip
-> AT+IP
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-> AT+IP=DHCP
-> AT+IP=STATIC,ip,netmask,gateway
DNS -- DNS record
-> AT+DNS
-> AT+DNS=dns1,dns2
NTP -- NTP server address
-> AT+NTP
-> AT+NTP=ntp_server_address
EUI -- MACADDRESS (EUI48) to EUI64 padding
-> AT+EUI
-> AT+EUI=pos0,val0_hex,pos1,val1_hex
LORAWAN -- LORAWAN Public/Private
-> AT+LORAWAN
-> AT+LORAWAN=PUBLIC
-> AT+LORAWAN=PRIVATE
PKTFWD -- Packet forwarder server address and port
-> AT+PKTFWD
-> AT+PKTFWD=address,port_up,[port_down]
CH -- Packet forwarder channels
-> AT+CH
-> AT+CH=0~7,freq,radio // Set multi SF LoRa channel
-> AT+CH=8,freq,radio,sf,bw // Set standard LoRa channel
-> AT+CH=9,freq,radio // Set FSK channel
-> AT+CH=0~9,0 // Turn off a channel
-> AT+CH=0~9,OFF // Turn off a channel
-> AT+CH=EU868|US915|EU433|CN780|AU915|AS923|KR920|CN470|IN866|CN470PREQUEL
BAUDRATE -- UART baudrate
-> AT+BAUDRATE
-> AT+BAUDRATE=new_br // MAX 4000000bps
5.6.3 FDEFAULT
Reset LoRaWAN AT modem to factory default configuration. This command will trigger the gateway
restart. Execute “AT+SYS” command to read configuration back.
Format:
AT+FDEFAULT
Return:
+FDEFAULT: OK
5.6.4 RESET
Use to reset the module. If module returns error, then reset function is invalid.
Format:
AT+RESET
Return:
+RESET: OK
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5.6.5 SYS
Check all configurations.
Format:
AT+SYS
Return:
+SYS: OK
-------------------------------------------------------------------------------
VERSION: 2.0.0, Nov 27 2016
LOG: OFF
AT ECHO: ON
BAUDRATE: 115200bps
MACADDR: 08:00:27:0D:2F:1F
ETHERNET: DHCP
DNS1: 114.114.114.114
DNS2: 8.8.8.8
NTP SERVER: 1.ubuntu.pool.ntp.org
EUI PADDING: {3, FF}, {4, FF}
GATEWAY ID: 080027FFFF0D2F1F
LORAWAN: Public
LORAWAN SERVER: 54.222.151.55
UPLINK UDP PORT: 1680
DOWNLINK UDP PORT: 1680
-------------------------------------------------------------------------------
5.6.6 VER
Get firmware version
Format:
AT+VER
Return:
+VER: 2.0.0, Nov 27 2016
5.6.7 LOG
Packet forwarder log control.
Format:
AT+LOG
AT+LOG=ON
AT+LOG=OFF
Return:
+LOG: ON
+LOG: OFF
5.6.8 ECHO
AT command echo control.
Format:
AT+ECHO
AT+ECHO=ON
AT+ECHO=OFF
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Return:
+ECHO: ON
+ECHO: OFF
5.6.9 MAC
Set and get gateway MAC address
Format:
AT+MAC
AT+MAC=001122334455
Return:
+MAC: 08:00:27:0D:2F:1F
5.6.10 IP
DHCP and static IP settings
Format:
AT+IP
AT+IP=DHCP
AT+IP=STATIC,IP,NETMASK,GATEWAY
Return:
+IP: DHCP
+IP: STATIC, 192.168.15.200, 255.255.255.0, 192.168.15.1
Static IP setting example:
AT+IP=STATIC, 192.168.15.200, 255.255.255.0, 192.168.15.1
+IP: STATIC, 192.168.15.200, 255.255.255.0, 192.168.15.1
5.6.11 DNS
Set DNS record
Format:
AT+DNS
AT+DNS=dns1,dns2
Return:
+DNS: dns1,dns2
Example:
AT+DNS=8.8.8.8,8.8.4.4
+DNS: 114.114.114.114, 8.8.8.8
Free DNS server list:
Table 5-3 DNS server list
Provider
Primary DNS Server
Secondary DNS Server
Google
8.8.8.8
8.8.4.4
DNS.WATCH
84.200.69.80
84.200.70.40
Comodo Secure DNS
8.26.56.26
8.20.247.20
OpenDNS Home5
208.67.222.222
208.67.220.220
114DNS
114.114.114.114
114.114.115.115
Alibaba DNS
223.5.5.5
223.6.6.6
Norton DNS
198.153.192.1
198.153.194.1
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Refer below link for latest information:
https://www.lifewire.com/free-and-public-dns-servers-2626062
5.6.12 NTP
Set NTP server address
Format:
AT+NTP
AT+NTP=ntp_server_address
ntp_server_address must be less than 40 bytes
Return:
+NTP: "1.ubuntu.pool.ntp.org"
5.6.13 EUI
EUI48 to EUI64 padding.
Format:
AT+EUI
AT+EUI=pos0,val0_hex,pos1,val1_hex // pos 0~7, val 00~FF
Return:
+EUI=pos0,val0_hex,pos1,val1_hex,gw_id
Example 1:
AT+MAC
+MAC: 00:11:22:33:44:55
AT+EUI=0,FF,1,FE
+EUI: 0, FF, 1, FE, FFFE001122334455
Example 2:
AT+MAC
+MAC: 00:11:22:33:44:55
AT+EUI=0,AA,7,99
+EUI: 0, AA, 7, 99, AA00112233445599
5.6.14 LORAWAN
Choose LORAWAN network type (public or private), this will influence LoRa syncword. Public to set
sync word 0x34, private to set sync word to 0x12. Try this command only when you know exactly what
this is.
Format:
AT+LORAWAN
AT+LORAWAN=PRIVATE
AT+LORAWAN=PUBLIC
Return:
+LORAWAN: PUBLIC
+LORAWAN: PRIVATE
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5.6.15 PKTFWD
Set packet forwarder server address and port (up and down).
Format:
AT+PKTFWD
AT+PKTFWD=address,port_up,[port_down]
Return:
AT+PKTFWD=address, port_up, port_down
Example:
AT+PKTFWD=iot.semtech.com,1680,1680
+PKTFWD: iot.semtech.com, 1680, 1680
5.6.15.1 Available Servers
Table 5-4 Available Cloud servers list
Address
Uplink Port
Downlink Port
Supplier
Iot.semtech.com
1680
1680
Semtech
us01-iot.semtech.com
1780
1780
Semtech
cn1.loriot.io
1780
1780
Loriot
ap1.loriot.io
1780
1780
Loriot
au1.loriot.io
1780
1780
Loriot
eu1.loriot.io
1780
1780
Loriot
sa1.loriot.io
1780
1780
Loriot
us1.loriot.io
1780
1780
Loriot
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5.6.16 CH
Set packet forwarder channels.
Format:
AT+CH=0~7,freq,radio // Set multi SF LoRa channel
AT+CH=8,freq,radio,sf,bw // Set standard LoRa channel
AT+CH=9,freq,radio // Set FSK channel
AT+CH=0~9,0 // Turn off a channel
AT+CH=0~9,OFF // Turn off a channel
AT+CH=band // Set to predefined channel plan
Return:
+CH: 0~7, freq, radio, SF7/SF12, BW125KHz (LORA_MULTI_SF)
+CH: 8, freq, radio, SFx, BWxxxKHz (LORA_STANDARD)
+CH: 9, freq, radio, 50Kbps (FSK)
5.6.16.1 Details about SX1301 Channels
The ST Nucleo LoRa GW supports maximum 10 channels, all of the channels are configurable.
Channel 0 to 7 are Multiple Spread Factor channels, bandwidth of which are fixed 125KHz, channel 8 is
standard LoRa channels which could supports 125KHz, 250KHz and 500KHz bandwidth, channel 9 is
FSK channel 50Kbps (RXBW 125KHz ).
Channel
Radio
Type
Bandwidth
Data Rate
0-10
A/B
LoRa Standard
500KHz
SF7 ~ SF12
(optional)
The ST Nucleo LoRa GW integrates two radio frequency front end. Which is identified as radio A and B,
the all 10 channels could be freely configured to use either of the two radios (A/B).
Each of the Radio could cover maximum 1.1MHz (500KHz) analyze bandwidth, so when set new
channels, please arrange the channels to radio carefully, so that bandwidth of radio is less than 1.1MHz.
According to lora_gateway library v4.1.1, SX125x bandwidth limitation is described as below table:
5.6.16.2 Predefined Channel Plan
Use “AT+CH=band” command to set predefined channel. Available bands are EU868, US915, EU433,
CN780, AU915, AS923, KR920, CN470, CN470Prequel and IN866.
The frequency unit is MHz.
CH
US915
0
902.5
1
905
2
907.5
3
910
4
912.5
5
915
6
917.5
7
920
8
922.5
9
925
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10
927.5
5.6.17 Baudrate
Set and get UART baudrate
Format:
AT+BAUDRATE
AT+BAUDRATE=new_br // Maximum: 4Mbps
Return:
+BAUDRATE: 115200
5.7 Button
ST Nucleo LoRa GW blue button can be used to restore to factory default in case of UART baudrate is
lost. Function:
Table 5-5 Button function description
Blue Button
Function
Click
Click button to print the system configuration (same as AT+SYS)
Long press
Press and hold the button (about 6s) until 3 LEDs (RED, BLUE, GREEN)
start blinking will restore the configuration to factory default.
(same as AT+FDEFAULT)
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6 Demo Page
When you succeed in setting up both the Nucleo LoRa GW and Sensor mote, you could check link
below for special application DEMO for STM device. Please use your own socket id instead of the part
which is marked in red below.
https://ap1.loriot.io/apps/stm/index.html?id=BE7A0089&token=LCTGG3rg8oczTGmw1aYHtg
https://cn1.loriot.io/apps/stm/index.html?id=BE7A0089&token=LCTGG3rg8oczTGmw1aYHtg
Figure 6-1 STM Application on Loriot Server
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7 Others information for reference
7.1 Power supply and consumption
7.1.1 Power supply
The power supply +5V will be injected into the system via micro USB connector of the Nucleo shield
(blue board) from an external adapter. The max rated current of this adapter is suggested to be more
than 1A. The Nucleo board (white board) should be powered by the supply from the shield board. So
the Nucleo board (white board) would be power supplied by VIN (Pin15 of CN8 on the Nucleo F7
board).
Figure 7-1 Side View of the Nucleo LoRa GW Demo
When STM32 Nucleo-144 board is power supplied by VIN, the jumper configuration must be the
following:
⚫ Jumper JP3 on pin 5 and pin 6 for VIN
⚫ Jumper JP1 OFF
Antenna
Virtual COM
External
Power
supply +5V
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7.1.2 Power consumption
Table 7-1 below shows the current consumption of the Nucleo shield module in different mode. The
maximum current would be almost 360mA when both uplink and downlink are on.
Table 7-1 Power consumption of ST LoRa Nucleo GW Module
Band
Standby consumption
Current
@TX max OP
Consumption
@8 CH RX Only
RX/TX ON
Max Current
HF
39mA
175mA
330mA
364mA
For the consumption of the Nucleo F746ZG board, please refer to the manual from ST. The max
current of this board would be more than 200mA depend on the source code and peripheral interface
used.
7.2 LED status
On the GW shield (Blue board), there is only one LED to show power supply.
➢ 5V_ON (Green): When there is external power supply +5V to the system from adapter, this
LED will be ON.
On the Nucleo F746ZG board (White board), there will be 3 LEDs will be used in the demo:
➢ LD3 (Red): ON -> ST LoRa GW board is detected, OFF -> ST LoRa GW board is removed
➢ LD2 (Blue): Blink when Packet is received
➢ LD1 (Green): Reserved
For others LEDs used on the Nucleo F746ZG board, please refer to the manual of the Nucleo board
from ST.
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7.3 RF performance measurement
Table 7-2 below shows the RF performance in conductive test. Please note that, there is no external
PA refer to Semtech’s reference design, so the RF power is output from SX125x FEM directly. The
maximum output power normally would be 6-7dBm type in different band.
Table 7-2 RF performance
Band
Frequency
TX op max/dBm
Harmonic/dBm
Sensitivity/dBm
HF
915MHz
6dBm type
Below -56dBm
SF12 125kHz
-140dBm
SF11 125kHz
-137dBm
SF10 125kHz
-134dBm
SF9 125kHz
-131dBm
SF8 125kHz
-128dBm
SF7 125kHz
-124dBm
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8 Reference documents
a) UM1974-User manual, STM32 Nucleo-144 board; STMicroelectronics
b) LoRaWAN™ Specification 1.0.2; LoRa Alliance
c) Data sheet of STM32F745xx/STM32F746xx, ARM®-based Cortex®-M7 32b MCU+FPU,
462DMIPS, up to 1MB Flash/320+16+ 4KB RAM, USB OTG HS/FS, ethernet, 18 TIMs, 3
ADCs, 25 com itf, cam & LCD, Datasheet - production data; STMicroelectronics
d) Data sheet of SX1301; Semtech
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Revision
V1.0 2016-06-22
+ First version
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received, including interference that may cause
undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation.
This equipment generates uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help
NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized
modifications to this equipment. Such modifications could void the user’s authority to operate the equipment.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.
This radio transmitter [8976A-GSHF1] has been approved by Innovation, Science and Economic
Development Canada to operate with the antenna types listed below, with the maximum permissible gain
indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated
for any type listed are strictly prohibited for use with this device.
Dipole antenna, Antenna gain: -2dBi, Impedance: 50Ω
This device complies with RSS-247 of Industry Canada.
Operation is subject to the following two conditions:
this device may not cause harmful interference, and
this device must accept any interference received, including interference that may cause undesired
operation.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de
licence. L'exploitation est autorisée aux deux conditions suivantes :
(1) l'appareil ne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est
susceptible d'en compromettre le fonctionnement.
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Cet équipement est conforme aux limites d ’exposition aux rayonnements de la IC établies pour
unenvironnement non contrôé. Cet équipement doit être installé et fonctionner à au moins 5mm de distance
d’un radiateur ou de votre corps.
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