Skip to main content

Node-RED

1. Installation​

Check installation instruction for different OS from this link: https://nodered.org/docs/getting-started/

1.1 Install Example for CENTOS​

1.1.1 Installation​

Reference Instruction from this link:  https://github.com/node-red/linux-installers
Run below commands and wait for installation complete.

image

Verify if the installation was successful

Type in the command line interface ** [node-red]**[   ]

The following information appears to prove that the installation has been successful

image

1.1.2 If you want to start Node-RED as a background process​

Type in the command line interface   nohup node-red &

It will prompt after startup

image

After seeing the above information, press enter.

Type in the command line   exit.

The above is the installation and startup process of nodered. If you don't understand anything, you can go to the nodered official website. There are installation instructions for various systems. The address has a link at the top.

1.2 Install in Dragino Gataway​

The below models from Dragino already have Node-Red installed by default. Users no need to install it by themselves.

Other gateway model doesn't support built-in Node-Red server.

2. General Use of  Node-RED​

This section describes some basic features of Node-RED. For more info please check the Node-RED official document.

2.1 Login to Node-RED interface​

Enter your public IP address followed by the port number 1880

example：http://xxx.xx.xx.xx:1880/

image

2.2 Add flow​

Take NBSN95 mod1 UDP protocol as an example

After logging into the interface click **"+" **to create a flow

image

Rename the stream

image

Drag UDP into the editing area

image

The same method as above, drag and drop functions and debug into the editing area

image

configure UDP in

image

Write to the UDP port that the device node sends to the server

Example My UDP device node sends to server port 8585
just write 8585

Note: that the port that is already in use cannot be used. If the receiving fails, you need to check whether the port of the server is occupied. The sending port of the device node should not use the default port used by the server, such as a common port such as 8080.

In order to avoid data confusion, different types of nodes do not use the same UDP port, because different nodes have different data formats and different functions.

image

When the node successfully sends data, the effect shown in the following figure will appear

image

2.2.1 About function​

If you are familiar with JS code, you can write it yourself
If you are not familiar, we have the JS code for each type of node, you just need to copy and paste it into it.(dragino-end-node-red-Flow)

image

2.3 Plot Chart for sensors​

If you need data visualization, please refer to the following

image

1. Click Install 2. Search the dashboard 3. Click Install

image

After the installation is successful, nodered will show the following node icon

image

2.3.1 the line chart as an example​

Drag the line chart to the editing area

Just drag and drop as many as you need, or you can copy

The demo uses 3 kinds. Voltage, temperature, humidity

image

double click function

image

Adjusted to 3, because we need to display 3 charts

image

2.3.2 the chart settings​

Double-click while setting up the node as above

image

image

image

image

After the display interface is defined for the first time, subsequent charts can directly select the display interface

image

image

Connect graph nodes to functions with lines

Click to deploy

image

Enter the server public IP + port 1880/ui

example：http://xxx.xx.xx.xx:1880/ui

image

At this point, the basic demonstration of nodered is completed. If you need to beautify the chart and various visualizations, you can go to the official documentation of nodered for further understanding.

2.4 Store Value​

Regarding storage, we recommend two ways.

2.4.1 [ ]Method 1: Generate txt document directly​

Sample JSON file: https://www.dropbox.com/sh/mduw85jcuwsua22/AAAvwPhg9z6dLjJhmZjqBf_ma?dl=0

image

2.4.2 Method 2: Use sqlite database​

1.  Install SQLite​

image

2.  After the installation is successful, the nodes in the picture will appear​

image

3.  Import sample flow​

Refer to the import example below to import the sqlite example flow

Download sample JSON file link: https://www.dropbox.com/sh/mduw85jcuwsua22/AAAvwPhg9z6dLjJhmZjqBf_ma?dl=0

3. Import Input Flow for Dragino Sensors​

Dragino provides input flow examples for the sensors.

User can download the required JSON file through Dragino Node-RED input flow template.

Take LHT65N as an example  (Assume this node is already registered with TTN, MQTT protocol to connect)

image

image

image

image

After the import is successful, change the MQTT in node to your TTN information

image

image

Configure information consistent with your TTN

image

image

API keys generated by the password for you

image

Topic modify it to the following format

v3/[Application ID]@ttn/devices/[End device ID]/up

image

After the modification is completed, click Deploy

4. Add Dragino node​

Please do not modify the code anywhere to avoid any exceptions

The prerequisite is to install the Dragino node and the sqlite node dashboard node

The echarts library is placed in the static file of node red

Reference link: https://nodered.org/docs/user-guide/runtime/configuration

Please download the general flow and echarts files from this link：https://www.dropbox.com/scl/fo/677l8f3u3evpojcdcj3j7/h?rlkey=0iqbwf27dbyi75egmrp0p0yjx&dl=0

4.1 Installing Dragino nodes​

image

image

image

4.2 Import General Flow​

image

image

Please refer to the previous chapters for MQTT settings and sqlite installation settings

4.3 Using flow​

Just double-click on the drag ino decoder node and select it from the dropdown menu

Corresponding nodes are sufficient

image

Setting the template node

image

When multiple nodes are needed in the same process

image

If using the NodeRed that comes with the Dragino gateway

Change to the following path

"/static/echarts.min.js"

image

After setting up, select deployment

image

Enter the server public IP + port 1880/ui

example：http://xxx.xx.xx.xx:1880/ui

You can see the UI display effect in the following picture

image

5. FAQ​

5.1.1 Install node-red-node-base64​

image

image

5.1.2 Import Example Flow​

The Json file for the example flow can be downloaded at this link:https://github.com/dragino/dragino-end-node-decoder/blob/main/Node-RED/chirpstack-MQTT-down.json.

image

image

5.1.3 Establish connection​

Setting up the server:

image

image

image

Change the theme to Application lD and DevEUl for ChirpStack:

image

image

image

And then，

image

image

Connection established successfully：

image

image

image

Example action video:https://youtu.be/Lqm-k5nQ5eU

5.2.1 Reference 5.1.1 Installing base64 nodes​

5.2.2 Import Example Flow​

Reference 5.1.2

Taking LT-222222-L as an example

The Json file for the example flow can be downloaded at this link:https://github.com/dragino/dragino-end-node-decoder/blob/main/Node-RED/TTN-V3-MQTT-down.json

Please refer to this video for specific operation steps: https://youtu.be/kms679e4m_Y

::: like-container