434.Touchscreen user interface for Node-RED provided by the Nextion Display with ESP8266. This project will show you how to build a touchscreen user interface for Node-RED using the Nextion display and the ESP8266 so that you can control the electronic appliances in your home. The goal of this project is to give you the ability to control your home automation system through the Nextion display so that you don't have to use your smartphone or computer to access the Node-RED user interface. This will be accomplished while ensuring that the Node-RED Dashboard is always kept up to date.

In order to exert control over four distinct outlets, you will construct a physical Node-RED interface using the Nextion display. Take a look at the

The user interface of Nextion controls four distinct outputs. Through the use of a 433 MHz transmitter. ESP8266 #1 controls Outlet #1 as well as Outlet #2. Additionally, this ESP8266 is connected to the display of the Nextion. ESP8266 #2 is in charge of controlling two LEDs that are referred to as the Workbench and Top light. The plan is for you to replace these two LEDs with other outputs that are of use to you, such as a relay or a SONOFF smart switch, for example. When you use the Nextion display to turn an output ON, the state of the corresponding node in the Node-RED Dashboard is automatically updated to reflect the change. The Node-RED Dashboard also gives you the ability to exercise control over all of these outputs.

How does the project work? The steps involved in completing this project are outlined in the figure below. 1) When you tap the Outlet #1 ON button, the Nextion display communicates with the ESP8266 via serial communication to let it know that the button was tapped. This lets the ESP8266 know which button was tapped. 2) The ESP and Raspberry Pi are able to communicate with one another thanks to a communication protocol known as MQTT. The Raspberry Pi is

equipped with the Mosquitto broker, which is responsible for collecting all of the MQTT messages and distributing them to the various devices that have subscribed to a specific topic. The ESP will publish a "true" message on the topic office/outlet1/buttonState whenever you tap the ON button that is displayed on the Nextion display. 3) The Node-RED message will be sent to the Outlet #1 button, which is subscribed to this topic and will therefore receive it. When it receives that message, it toggles the state of the button that corresponds to it so that it is ON. When something like this takes place, the Node-RED sends out a message with the subject office/outlet1. 4) Since the ESP is subscribed to this topic, it is aware that Node-RED has switched the button state to the ON position. In order to activate Outlet #1, the ESP8266 initiates the transmission of a signal at 433 MHz via a 433 MHz transmitter. Controlling any of the other outputs follows the same procedure as described here.

The Raspberry Pi 2x ESP8266 – read more about them on the Best ESP8266 Wi-Fi Development Board 3.2" Nextion display basic model – read more about it here. Purchasing advice for the Nextion display MicroSD card 433 MHz RF Plugs that are operated by remote control Transmitter and receiver operating at 433 MHz 2x LEDs 2 resistors with 330 Ohm each Jumper wires for the breadboard Developing the User Interface for the Nextion

The user interface for the 3.2-inch Nextion basic model has been developed by our team. If you are utilizing a Nextion display of a different size, you will need to make some modifications to the user interface in order for it to function properly for your particular model. In order to do this, you will need to edit the.HMI file and produce a new.TFT file.

ESP8266 #1 – Schematics By following the schematic in the following figure, you can successfully connect an ESP8266 to a Nextion display as well as a 433MHz transmitter. It is necessary to connect the RX pin of the ESP8266 to the TX pin of the Nextion display. It is necessary to connect the RX pin of the Nextion display to the TX pin of the ESP8266.The data pin of the 433 MHz transmitter is connected to the

GPIO 5 of the ESP8266 (D1 pin). A connection has been made between the VCC pin of the 433 MHz transmitter and the 3V3 pin of the ESP8266. ESP8266 #2 – Schematics Connect two LEDs to the second ESP8266 in the manner denoted by the accompanying circuit diagram. GPIO 5 is the point of connection for the red LED (D1 pin). GPIO 4 is the point of connection for the green LED (D2 pin). Decoding the RF Signals from the Sockets Decoding the signals that cause the sockets to turn on and off is necessary if you want to use 433 MHz signals to control the sockets in your device. Code: Each individual ESP8266 device requires a unique sketch to be uploaded by the user. Be sure to make the necessary adjustments to each code in order to get them to function properly for you. Note: Before you upload any code, check that the Nextion library for the Arduino IDE is properly configured to work with the ESP8266. This must be done before you upload any code.

After setting up everything, you should be able to control your outputs by tapping the buttons on the display of the Nextion. Instant updates are made to the Node-RED Dashboard whenever you tap one of the buttons displayed on the Nextion. We sincerely hope that you have found this project to be beneficial. After gaining an understanding of the concepts presented in this project, you will be able to modify it to control virtually anything you want by utilizing the Nextion display interface and Node-RED.