Temperature sensor data visualisation with Node-RED: Difference between revisions
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* Learn how to extract specific sensor data using the Node-RED '''function''' node. | * Learn how to extract specific sensor data using the Node-RED '''function''' node. | ||
* Learn how to create a '''Dashboard''' in Node-RED to monitor live data. | * Learn how to create a '''Dashboard''' in Node-RED to monitor live data. | ||
= Subscribe to MQTT = | |||
== Open Node-RED == | |||
* Click on the Raspberry Pi main drop down menu. | |||
* Select Programming > Node-RED | |||
[[File:Screen Shot 2022-04-13 at 5.28.49 am.png]] | |||
Revision as of 19:32, 12 April 2022
Overview
This lesson assumes that a temperature sensor is sending data to The Things Network. In this lesson we will use the MQTT protocol to subscribe to data transmission events. We will create a program in Node-RED to subscribe to the data transmissions and to graph the data coming from the sensor using the in-built Dashboard function in Node-RED.
Learning Objectives
- Learn how to subscribe to a MQTT using the Node-RED MQTT-in node
- Learn how to extract specific sensor data using the Node-RED function node.
- Learn how to create a Dashboard in Node-RED to monitor live data.
Subscribe to MQTT
Open Node-RED
- Click on the Raspberry Pi main drop down menu.
- Select Programming > Node-RED
