This guide will help to do initial setup to a Dragino RS485-LN node: Power on and UART connectivity.
- Datasheet: https://bit.ly/Dragino-RS485-LN
- User manual: v1.3 and Online version
- Document base: From Dragino
1. Pin Mapping
RS485 pins:
- RS485 A: to RS485 A of the RS485 sensor
- RS485 A: to RS485 A of the RS485 sensor
- GND_485 (Optional): To GND of RS485 sensor. This is only required for long RS485 cable.
Power pins:
- VIN+: To VCC+ of the power supply (7-24v). Recommended voltage: 12v or 24v.
- VIN-: To GND of the power supply
Other pins:
- INT: To set interrupt to send an uplink.
- PROG: To connect to UART cable for debugging or uploading firmware
Buttons:
- RST: To reset node
- PRO: To enter flashing mode
- ACT: To send an uplink
2. Connect to Power and RS485 Sensors
Sample wiring from RS485-LN to multiple RS485 sensors:
- 12vDC or 24vDC adapter is required.
- A and B port of RS485-LN node are wired parallelly to A and B of RS485 sensors.
3. Connect UART cable
In the box, there is a 3.5mm program cable.
To connect the 3.5mm program cable into PROG port of the node and UART USB into the laptop/PC.
4. Connect to UART console
Step 1: To open a UART console
- You need to install a driver for UART USB at common-helper-programs
- You need to install and configure Tera Term at common-helper-programs
Step 2: 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 3: 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.
Done.
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