WISE-PaaS/EdgeSense

For RISC products, we adopt lightweight EdgeSense features. In this chapter, we introduce the basic concepts for these components.

Edge Intelligent Suite

Node-RED

Node-RED is a programming tool for wiring together hardware devices, APIs and online services in new and interesting ways.

It provides a browser-based editor that makes it easy to wire together flows using the wide range of nodes in the palette that can be deployed to its runtime in a single-click.

To start up Node-RED server on your device, please

1. Check your IP address on device first, e.g. ifconfig

2. Execute node-red to start server.

$ node-red

24 Nov 07:28:47 - [info]

Welcome to Node-RED

====== ======= ======

24 Nov 07:28:47 - [info] Node-RED version: v0.16.2
24 Nov 07:28:47 - [info] Node.js version: v6.10.3
24 Nov 07:28:47 - [info] Linux 4.4.38-4760LIV1121 arm64 LE
24 Nov 07:28:49 - [info] Loading palette nodes
24 Nov 07:28:53 - [warn] ------------------------------------------------------
24 Nov 07:28:53 - [warn] [rpi-gpio] Info : Ignoring Raspberry Pi specific node
24 Nov 07:28:53 - [warn] ------------------------------------------------------
24 Nov 07:28:53 - [info] Settings file  : /home/root/.node-red/settings.js
24 Nov 07:28:53 - [info] User directory : /home/root/.node-red
24 Nov 07:28:53 - [info] Flows file  : /home/root/.node-red/flows_rsb-4760.json
24 Nov 07:28:53 - [info] Creating new flow file
24 Nov 07:28:53 - [info] Starting flows
24 Nov 07:28:53 - [info] Started flows
24 Nov 07:28:53 - [info] Server now running at http://127.0.0.1:1880/

3. Open your browser on your host PC, and go to  http://<your IP address>:1880

You are able to see the website like this.

Advantech also implements some Node-RED nodes. If you're interested, you can check it.

• NodeRED for SusiIoT
• NodeRED for IoTGW

MQTT Broker

There are many MQTT brokers, and we choose Mosquitto as default broker.

You can try this sample flow.

1. Enable Mosquitto broker

# /etc/init.d/mqtt start
Starting MQTT Server:  [ OK ]

2. Subscribe a topic

# mosquitto_sub -d -t 'risc/topic'
Client mosqsub/2768-rsb-4760 sending CONNECT
Client mosqsub/2768-rsb-4760 received CONNACK
Client mosqsub/2768-rsb-4760 sending SUBSCRIBE (Mid: 1, Topic: risc/topic, QoS: 0)
Client mosqsub/2768-rsb-4760 received SUBACK
Subscribed (mid: 1): 0

3. Connect from another terminal, e.g. SSH. Then, publish contents for this topic.

# mosquitto_pub -d -t 'risc/topic' -m 'advantech'
Client mosqpub/2767-rsb-4760 sending CONNECT
Client mosqpub/2767-rsb-4760 received CONNACK
Client mosqpub/2767-rsb-4760 sending PUBLISH (d0, q0, r0, m1, 'risc/topic', ... (9 bytes))
Client mosqpub/2767-rsb-4760 sending DISCONNECT

4. You should be able to see contents from Subscriber side.

Client mosqsub/2766-rsb-4760 received PUBLISH (d0, q0, r0, m0, 'risc/topic', ... (9 bytes))
advantech

SQLite

SQLite is an embedded SQL database engine. It reads and writes directly to ordinary disk files. SQLite is also a compact library. So, you can write programs that use SQLite in many supported languages, such as C/C++, GO, Java, Objective-C, Perl, PHP, Python, etc.

Here is a SQL example. You can input these commands on your devices for trial.

# sqlite3 test.db3
SQLite version 3.11.0 2016-02-15 17:29:24
Enter ".help" for usage hints.

sqlite> create table project(model, vendor, chipset);
sqlite> create index project_model_index on project(model);

sqlite> insert into project values ('RSB-4760', 'Qualcomm', 'APQ8016');
sqlite> insert into project values ('RSB-4411', 'NXP', 'i.MX6');
sqlite> insert into project values ('ROM-7421', 'NXP', 'i.MX6');
sqlite> insert into project values ('UBC-221', 'Intel', 'Quark');

sqlite> select * from project;
RSB-4760|Qualcomm|APQ8016
RSB-4411|NXP|i.MX6
ROM-7421|NXP|i.MX6
UBC-221|Intel|Quark

sqlite> select * from project where vendor='NXP';
RSB-4411|NXP|i.MX6
ROM-7421|NXP|i.MX6

sqlite> select count(*) from project;
4

sqlite> .quit

For more information, you can refer to the SQLite official website.

- SQLite In 5 Minutes Or Less

- Command Line Shell For SQLite