LoRaGo PORT – SX1301/SX1308 Based LoRaWAN Concentrator Module

Overview

This product has an SX1301/SX1308 baseband processor and two SX1257/SX1259 RF frontend chips, and peripheral circuits onboard. and it could listen on multiple channels and decode packets sent with different LoRa spreading factors simultaneously.  This concentrator module is supposed to connect to a host controller via SPI interface. A host controller could either be an MCU with an SPI interface or a PC with a USB to SPI converter located between the concentrator and PC. All the RF jobs are done within this concentrator module and the user could focus on high-level software development. HAL source files are provided by Semtech who is the manufacturer of the baseband processor.

 

Features

  • 4V-12V wide range supply voltage
  • +-1ppm TCXO
  • Compact size 70mm x 34mm
  • 50ohm RF port
  • ESD protected digital IO
  • Plug and play design for Raspberry Pi

Pin Configuration

LoRaGo_Port_Pinout

Pin No. Pin Name Pin Type Description
1 GND Power Power ground.
2 +VIN Power Power supply.
3 SDA Open Drain SDA of the onboard 24AA02E64T EEPROM chip. Could be left unconnected if not used.
4 +VIN Power Power supply.
5 SCL Open Drain SCL of the onboard 24AA02E64T EEPROM chip. Could be left unconnected if not used.
 6  GND Power Power ground.
 7  SCK Input SCK of the SPI interface.
 8 PSEN Input Power supply enable pin, active HIGH, internally pulled-up. A LOW voltage on this pin disable the power converters onboard. Could be left unconnected if not used.
 9   GND Power Power ground.
10 GND Power Power ground.
11 MISO Output MISO of the SPI interface.
12 RESET Input Baseband processor reset pin. Active HIGH.
13 GND Power Power ground.
14 GND Power Power ground.
15 MOSI Input MOSI of the SPI interface.
16 SYSPG Open Drain System power good pin. This pin is internally pulled-up. A HIGH level indicates that the onboard power converters are working well, while a LOW level indicates that there is something wrong with the onboard power converters. This pin could be left unconnected if not used.
17 GND Power Power ground.
18 GND Power Power ground.
19 #CS Input #CS pin of the SPI interface. Active LOW.
20 GND Power Power ground.
21 IO0 IO GPIO0 of the baseband processor.
22 GND Power Power ground.
23 IO1 IO GPIO1 of the baseband processor.
24 GND Power Power ground.
25 IO2 IO GPIO2 of the baseband processor.
26 GND Power Power ground.
27 IO3 IO GPIO3 of the baseband processor.
28 GND Power Power ground.
29 IO4 IO GPIO4 of the baseband processor.
30 NC NC Not used.

u.fl Connector 1: Pulse Per Second input to connect to external GPS
u.fl Connector 2: RF signal port

 

Absolute Maximum Ratings

Parameter Min. Max. Unit
Supply Voltage(+VIN) -0.3 12.5 V
IO Pin Voltage -0.3 3.6 V
Operating Temperature 75 Celsius

 

Electrical Characteristics

T=25C, +VIN=5V, unless otherwise specified

Parameter Condition Min. Typ. Max. Unit
Operating Supply Voltage 4.0 5.0 12V V
Current Consumption All channels active, radio A ON, radio B ON, receiving mode 370 420 mA
Current Consumption Continous wave transmitting at 20dBm 195 210 mA
Logic low input threshold 0.4 V
Logic high input threshold 2.9 V
Logic low output level  – 0 0.4 V
Logic high output level  –  3.9  –  3.3 V

RF Performance Data

Continuous Wave Transmitting Power Test

Dig Mix PA Tx Power
3 8 0 -4.1dBm
3 15 0 7.6dBm
0 8 0 3.2dBm
0 15 0 9.2dBm
0 8 1 12.4dBm
0 15 1 20.5dBm
0 8 3 27.8dBm
0 15 3 32.0dBm

dig=3, mix=8, PA=0

RCA_006

 

dig=3, mix=8, PA=0

RCA_007

 

dig=0, mix=8, PA=0
RCA_000

 

dig=0, mix=15, PA=0
RCA_001

 

dig=0, mix=8, PA=1
RCA_002

dig=0, mix=15, PA=1
RCA_003

dig=0, mix=8, PA=3
RCA_004

dig=0, mix=15, PA=3

RCA_005

LoRa Packet Transmitting Test

dig=0, mix=15, PA=1, LoRa Modulation, SF=7, BW=125KHz

RCA_008

Tx Path Gain Measure Result

Port1: Pin2 of U17, -10dBm input

Port2: Center pin of the u.fl connector

 

PA Gain: GAIN8=0, GAIN 16=0

gain00

 

 

PA Gain: GAIN8=1, GAIN 16=0

gain01

 

 

PA Gain: GAIN8=0, GAIN 16=1

gain10

 

 

PA Gain: GAIN8=1, GAIN 16=1

gain11
PA Gain: GAIN8=1, GAIN 16=1 with 866.5MHz CF and 500MHz Span

gain11detail

Rx Path Gain Measure Result

Port1: Center pin of the u.fl connector

Port2: Pin27 of U19

rxall

 

866.5MHz CF and 500MHz Span

rxdetail

 

Typical Application with Raspberry Pi

We have created a step-by-step installation guide for Raspberry Pi users. Please click here.

Resources

  • HAL Library
  • Raspberry Pi Application Guide

Assembly Drawings

LoRaGoFront

LoRaGoBack

Right-click the above images and choose “save image as” to view a full-size picture.

Dimensions

Dimensions

Schematics are available after purchase, please contact us via Email.

 

 

 

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