Part 3¶

Introduction to Node-RED¶

• Estimated duration: 10 min
• practical Node-RED Setup

Receive Environmental Sensor Data in Node-RED¶

In this lab you will set up Node-RED in your Watson IoT Starter application created at the end of Part 1 and learn about low code programming with Node-RED.

• Estimated duration: 10 min
• practical Environmental Sensor Data

Node-RED Dashboard - Real Time Chart¶

In this lab you will import Node-RED flows which create Dashboard Charts. After learning about Node-RED Dashboard Charts, you will be able to display temperature and humidity graphs of the Device environmental sensors.

• Estimated duration: 15 min
• practical Plot Environment Sensor Data

Store data in Cloudant storage¶

In this lab you will store the device environmental sensor data in a Cloudant database in IBM Cloud.

• Estimated duration: 10 min
• practical Write Sensor Data to Cloud Storage

Node-RED Dashboard - Historical Playback Chart¶

In this lab you will read the historical sensor data from a Cloud storage database and create a graph of prior readings

• Estimated duration: 10 min
• practical Read Cloud Storage and Plot History Chart

Control your Device reporting interval¶

In this lab you will modify the ESP8266 Arduino program to receive MQTT commands from the IBM Cloud and build a Node-RED Dashboard Form to dynamically change the reporting interval of the ESP8266 DHT environmental sensor data.

• Estimated duration: 20 min
• practical Change the Sensor Reporting Interval Dynamically

Control your LED via Device Commands¶

In this lab you will modify / control your Device program to receive MQTT commands from the IBM Cloud and build a Node-RED flow to dynamically change the LED color of the device depending on Alert thresholds.

• Estimated duration: 20 min
• practical Control the LED Alert colors from the Cloud