LA66 LoRaWAN Module

What is LA66 LoRaWAN Module

Dragino LA66 is a small wireless LoRaWAN module that offers a very compelling mix of long-range, low power consumption, and secure data transmission. It is designed to facilitate developers to quickly deploy industrial-level LoRa and IoT solutions. It helps users to turn the idea into a practical application and make the Internet of Things a reality. It is easy to program, create and connect your things everywhere.

LA66 is a ready-to-use module which includes the LoRaWAN v1.0.4 protocol. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol.

Each LA66 module includes a world unique OTAA key for LoRaWAN registration.

Specification

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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

AT Command

AT Command is valid over Main TXD and Main RXD. Serial Baud Rate is 9600. AT commands can be found in AT Command documents.

Pin Mapping

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Land Pattern

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Part Number

Part Number: LA66-XXX

XX: 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

LA66 LoRaWAN Shield

LA66 LoRaWAN Shield is the Arduino Breakout PCB to fast test the features of LA66 module and turn Arduino to support LoRaWAN.

Pin Mapping & LED

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

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

Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake.

Upgrade Firmware of LA66 LoRaWAN Shield

what needs to be used

1.LA66 LoRaWAN Shield that needs to be upgraded

2.Arduino

3.USB TO TTL

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Wiring Schematic

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LA66 LoRaWAN Shield  >>>>>>>>>>>>USB TTL

GND                               >>>>>>>>>>>>GND

TXD                                >>>>>>>>>>>>TXD

RXD                                >>>>>>>>>>>>RXD

JP6 of LA66 LoRaWAN Shield needs to be connected with yellow jumper cap

Connect to the PC after connecting the wires

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Upgrade steps

Dial the SW1 of the LA66 LoRaWAN Shield to the ISP's location as shown in the figure below

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Press the RST switch on the LA66 LoRaWAN Shield once

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Open the upgrade application software

放个烧录软件的下载链接

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Select the COM port corresponding to USB TTL

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Select the bin file to burn

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Click to start the download

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The following figure appears to prove that the burning is in progress

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The following picture appears to prove that the burning is successful

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LA66 USB LoRaWAN Adapter

LA66 USB LoRaWAN Adapter is the USB Adapter for LA66, it combines a USB TTL Chip and LA66 module which can easy to test the LoRaWAN feature by using PC or embedded device which has USB Interface.

Pin Mapping & LED

Example Send & Get Messages via LoRaWAN in PC

Example Send & Get Messages via LoRaWAN in RPi

Install USB Driver

Install Minicom

Use AT Command to send an uplink message.

Send CPU/RAM usage to TTN via a script.

Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed.

Upgrade Firmware of LA66 USB LoRaWAN Adapter

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