Node-RED and ESP32 Project

About Course

Updated December 2022 to support Node-Red version 3

In December 2022, we added a new section with eight lectures that cover Node-RED version 3.

With these lectures, you will learn how to upgrade your Node-RED instance to version 3 and use the most important new and updated features.

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Updated June 2022 to support Node-Red version 2.2.2+ and Node.js 16.

More details about this update: We have added ten new lectures that show you how to update Node-Red to version 2.2.2, and Node.js to version 16, as well as how to use several of the new nodes that come with Node-Red 2.

There’s also a lecture showing you how to complete this project without having to set up an actual terrarium so that you can learn without the mess.

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This course teaches you how to design and build an automated control system using Node-RED and the ESP32.

This course will guide you through the construction of an automated control system. The deliverable is a Terrarium controller.

Along the way, you will learn a great deal about useful technologies such as the Node-Red programming environment and MQTT.

This course is perfect for makers familiar with the ESP32 and interested in learning how to use it alongside Node-RED.

Node-RED is a lightweight graphical programming tool. You can use it to join various hardware and software components and create applications such as the automated terrarium controller in this course.

Node-RED is used in a range of settings. Makers create home automation applications, and organisations use it to automate their factory floors, among many other possibilities.

The ESP32 is a powerful low-cost microcontroller with built-in Wi-Fi that we can program with the familiar Arduino IDE. Its “call to fame” is that it makes it easy for anyone familiar with the Arduino to leverage their knowledge and create gadgets that need more memory and processing power than what the Arduino Uno can provide, in addition to Wifi and Bluetooth. All this at a lower price point.

Node-RED, the lightweight graphical programming tool.
ESP32, the powerful low-cost microcontroller with Wifi that you can program with the Arduino IDE.
MQTT Mosquitto broker, for reliable messaging between the ESP32 and Node-RED.
Use any Raspberry Pi as a host for Node-RED and the MQTT Mosquitto broker.
How to combine Node-RED, MQTT, the Raspberry Pi, and the ESP32 to create a complete automated control application.
Use Javascript inside Node-RED to process sensor inputs and calculate actions.

Course Content

01. Introduction

A Message from the Professor
001. 01.10 What is this course about.mp4

00:00
002. 01.20 Software requirements.mp4

00:00
003. 01.30 Hardware requirements.mp4

00:00
004. 01.40 How to make the most out of this project.mp4

00:00
005. 01.50 Node-RED versions (watch before you continue).mp4

00:00
006. Please download the project archive.html

00:00
Section Quiz

02. 02 – The completed controller circuit

03. 04 – Prepare your Raspberry Pi

04. 05 – Getting started with Node-RED

001. 05.10 Introduction to Node-RED, examples and documentation.mp4

00:00
002. 05.20 Install Node-RED on the Raspberry Pi.mp4

00:00
003. 05.30 Node-RED settings and configuration.mp4

00:00
004. 05.35 Editor walkthrough.mp4

00:00
005. 05.40 Nodes.mp4

00:00
006. 05.45 Node groups.mp4

00:00
007. 05.50 Flows.mp4

00:00
008. 05.60 Messages.mp4

00:00
009. 05.65 Variables and context.mp4

00:00
010. 05.100 The complete node.mp4

00:00
011. 05.110 The catch node.mp4

00:00
012. 05.120 The linkout and linkin nodes.mp4

00:00
013. 05.130 The switch node.mp4

00:00
014. 05.140 The range node.mp4

00:00
015. 05.150 The delay node.mp4

00:00
016. 05.160 The trigger node.mp4

00:00
017. 05.170 The RBE (Report by Exception) node.mp4

00:00
Section Quiz

05. 06 – Node-RED dashboard

001. 06.10 A review of the Node-RED Dashboard.mp4

00:00
002. 06.20 Text input and output.mp4

00:00
003. 06.30 The button.mp4

00:00
004. 06.40 The gauge and slider.mp4

00:00
005. 06.60 The switch.mp4

00:00
006. 06.70 The dropdown.mp4

00:00
007. 06.80 The UI template.mp4

00:00
008. 06.90 The form.mp4

00:00
Section Quiz

06. 07 – MQTT on the Raspberry Pi with Mosquitto

07. 08 – MQTT and Node-RED experiments

08. 09 – Terrarium project, prototype 1 soil moisture sensing

09. 10 – Terrarium project, prototype 2 Voltage sensing

10. 11 – Terrarium project, prototype 3 Google Sheet data logging

11. 12 – Terrarium project, prototype 4 Add humidity threshold control to Dashboard

12. 13 – Add Task Scheduler

13. 14 – Setup the terrarium with the actual soil sensor

14. Node-RED 2 upgrade and features

15. 19 – Recipes

16. Conclusion and Bonus Lecture

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About Course

What Will You Learn?

Course Content

01. Introduction

A Message from the Professor

001. 01.10 What is this course about.mp4

002. 01.20 Software requirements.mp4

003. 01.30 Hardware requirements.mp4

004. 01.40 How to make the most out of this project.mp4

005. 01.50 Node-RED versions (watch before you continue).mp4

006. Please download the project archive.html

Section Quiz

02. 02 – The completed controller circuit

001. 02.10 The completed controller circuit.mp4

002. 02.20 Setup the circuit on a breadboard.mp4

003. 02.30 The PCB.mp4

004. 2.35 The PCB enclosure (Fusion 360 project).html

005. 02.40 The power supply.mp4

006. 02.50 Testing without the dirt.mp4

Section Quiz

03. 04 – Prepare your Raspberry Pi

001. 04.10 Install Raspberry Pi OS.mp4

002. 04.20 First boot and set hostname.mp4

Section Quiz

04. 05 – Getting started with Node-RED

001. 05.10 Introduction to Node-RED, examples and documentation.mp4

002. 05.20 Install Node-RED on the Raspberry Pi.mp4

003. 05.30 Node-RED settings and configuration.mp4

004. 05.35 Editor walkthrough.mp4

005. 05.40 Nodes.mp4

006. 05.45 Node groups.mp4

007. 05.50 Flows.mp4

008. 05.60 Messages.mp4

009. 05.65 Variables and context.mp4

010. 05.100 The complete node.mp4

011. 05.110 The catch node.mp4

012. 05.120 The linkout and linkin nodes.mp4

013. 05.130 The switch node.mp4

014. 05.140 The range node.mp4

015. 05.150 The delay node.mp4

016. 05.160 The trigger node.mp4

017. 05.170 The RBE (Report by Exception) node.mp4

Section Quiz

05. 06 – Node-RED dashboard

001. 06.10 A review of the Node-RED Dashboard.mp4

002. 06.20 Text input and output.mp4

003. 06.30 The button.mp4

004. 06.40 The gauge and slider.mp4

005. 06.60 The switch.mp4

006. 06.70 The dropdown.mp4

007. 06.80 The UI template.mp4

008. 06.90 The form.mp4

Section Quiz

06. 07 – MQTT on the Raspberry Pi with Mosquitto

001. 07.10 Quick introduction to MQTT.mp4

002. 07.20 Install MQTT Mosquitto on the Raspberry Pi.mp4

003. 07.30 MQTT sub and pub examples.mp4

004. 07.40 Mosquitto configuration and authentication.mp4

005. 07.60 MQTT authenticated sub and pub examples.mp4

Section Quiz

07. 08 – MQTT and Node-RED experiments

001. 08.10 The MQTT in node.mp4

002. 08.20 The MQTT out node.mp4

003. 08.30 MQTT-out Dashboard DHT22 example.mp4

004. 08.40 MQTT-in Dashboard DHT22 example.mp4

005. 08.50 MQTT Dashboard slider example.mp4

Section Quiz

08. 09 – Terrarium project, prototype 1 soil moisture sensing

001. 09.10 First prototype review.mp4

002. 09.20 Circuit review.mp4

003. 09.30 ESP32 sketch version 1 review.mp4

004. 09.40 Node-red flow Part 1 pump control.mp4

005. 09.50 Node-red flow Part 2 soil humidity.mp4

006. 09.60 Test and recap.mp4

Section Quiz

09. 10 – Terrarium project, prototype 2 Voltage sensing

001. 10.10 Voltage sensing demonstration.mp4

002. 10.20 Circuit review and simulation.mp4

003. 10.30 Sketch review.mp4

004. 10.40 Node Red flow review.mp4