This guide will help to do initial setup to a Dragino LT-22222-L node: Power on and UART connectivity.

1. Initial Setup

Main pins:

  • PRO: To connect to UART cable for debugging or uploading firmware.
  • GND: To GND of the power supply
  • VIN: To VCC+ of the power supply (7-24v). Recommended voltage: 12v or 24v.
  • ANT: To connect to the antenna.


  • RST: To reset node
  • PRO: To enter flashing mode

Other pins:

  • AVI1/2, ACI1/2: To connect to voltage/current (4-20mA) sensors.
  • DO1/2: Digital output
  • DI1/2: Digital input
  • RO1/2: AC/DC Relays. Up to 30V DC or 220v AC.

2. Connect to UART console (Optional)

Step 1: In the box, there is a 3.5mm program cable.

Step 2: To connect the 3.5mm program cable into PROG port of the node and UART USB into the laptop/PC.

Step 3: To open a UART console

Step 4: To open Tera Term and check if the frequency plan is AS923-2 for Vietnam.

  • Default password: 123456
  • Reboot: ATZ
  • Show all configurations: AT+CFG

Step 5: To check for LoRaWAN information.

  • DEUI: Node ID. Must be unique.
  • Required for OTAA: APPKEY.
  • Required for ABP: DADDR, NWKSKEY and APPSKEY
  • APPEUI: May or may not required by the server.


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