Table of Contents:

• 1.  LA66 LoRaWAN Shield
  • 1.1  Overview
  • 1.2  Features
  • 1.3  Specification
  • 1.4  Pin Mapping & LED
  • 1.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO.
  • 1.6  Example: Join TTN network and send an uplink message, get downlink message.
  • 1.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in Node-RED.
  • 1.8  Upgrade Firmware of LA66 LoRaWAN Shield
    • 1.8.1  Items needed for update
    • 1.8.2  Connection
    • 1.8.3  Upgrade steps
      • 1.  Switch SW1 to put in ISP position
      • 2.  Press the RST switch once
      • 3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade
• 2.  FAQ
  • 2.1   How to Compile Source Code for LA66?
• 3.  Order Info
• 4.  Reference

1.  LA66 LoRaWAN Shield

1.1  Overview

1.2  Features

• Arduino Shield base on LA66 LoRaWAN module
• Support LoRaWAN v1.0.4 protocol
• Support peer-to-peer protocol
• TCXO crystal to ensure RF performance on low temperature
• SMA connector
• Available in different frequency LoRaWAN frequency bands.
• World-wide unique OTAA keys.
• AT Command via UART-TTL interface
• Firmware upgradable via UART interface
• Ultra-long RF range

1.3  Specification

• CPU: 32-bit 48 MHz
• Flash: 256KB
• RAM: 64KB
• Input Power Range: 1.8v ~ 3.7v
• Power Consumption: < 4uA.
• Frequency Range: 150 MHz ~ 960 MHz
• Maximum Power +22 dBm constant RF output
• High sensitivity: -148 dBm
• Temperature:
  • Storage: -55 ~ +125℃
  • Operating: -40 ~ +85℃
• Humidity:
  • Storage: 5 ~ 95% (Non-Condensing)
  • Operating: 10 ~ 95% (Non-Condensing)
• LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
• LoRa Rx current: <9 mA
• I/O Voltage: 3.3v

1.4  Pin Mapping & LED

1. The LED lights up red when there is an upstream data packet
2. When the network is successfully connected, the green light will be on for 5 seconds
3. Purple light on when receiving downlink data packets

1.5  Example: Use AT Command to communicate with LA66 module via Arduino UNO.

Show connection diagram：

1.  open Arduino IDE

2.  Open project

LA66-LoRaWAN-shield-AT-command-via-Arduino-UNO source code link: https://www.dropbox.com/sh/cx0pspkwu62pr97/AAAbKh2ioPdZfSDtdDpooYqha?dl=0

3.  Click the button marked 1 in the figure to compile, and after the compilation is complete, click the button marked 2 in the figure to upload

4.  After the upload is successful, open the serial port monitoring and send the AT command

1.6  Example: Join TTN network and send an uplink message, get downlink message.

1.  Open project

Join-TTN-network source code link: https://www.dropbox.com/sh/0sjyncafa0gjv00/AACC2m1orov-QHRkvH8-ddCka?dl=0

2.  Same steps as 2.5,after opening the serial port monitoring, it will automatically connect to the network and send packets

1.7  Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in Node-RED.

1.  Open project

Log-Temperature-Sensor-and-send-data-to-TTN source code link: https://www.dropbox.com/sh/0aagmrpec1lxmva/AABMXWVMSHG9dK1_Zv_7xOmCa?dl=0

2.  Same steps as 2.5,after opening the serial port monitoring, it will automatically connect to the network and send packets

3.  Integration into Node-red via TTNV3

For the usage of Node-RED, please refer to: http://8.211.40.43:8080/xwiki/bin/view/Main/Node-RED/

1.8  Upgrade Firmware of LA66 LoRaWAN Shield

1.8.1  Items needed for update

1. LA66 LoRaWAN Shield
2. Arduino
3. USB TO TTL Adapter

1.8.2  Connection

Put a jumper cap on JP6 of LA66 LoRaWAN Shield. ( the jumper is to power on LA66 module)

Connect USB TTL Adapter to PC after connecting the wires

1.8.3  Upgrade steps

1.  Switch SW1 to put in ISP position

2.  Press the RST switch once

3.  Open the Upgrade tool (Tremo Programmer) in PC and Upgrade

2. Select the COM port corresponding to USB TTL

3. Select the bin file to burn

4. Click to start the download

5. Check update process

The following picture shows that the burning is successful

2.  FAQ

2.1   How to Compile Source Code for LA66?

Compile and Upload Code to ASR6601 Platform ：Instruction

3.  Order Info

Part Number:   LA66-LoRaWAN-Shield-XXX   

XXX: The default frequency band

• AS923:  LoRaWAN AS923 band
• AU915:  LoRaWAN AU915 band
• EU433:  LoRaWAN EU433 band
• EU868:  LoRaWAN EU868 band
• KR920:  LoRaWAN KR920 band
• US915:  LoRaWAN US915 band
• IN865:  LoRaWAN IN865 band
• CN470: LoRaWAN CN470 band
• PP:        Peer to Peer LoRa Protocol

4.  Reference

• Hardware Design File for LA66 LoRaWAN Shield : Download