Traffic light controlled through NodeMCU from mobile device over WiFi

Circuit is done as shown in the diagram. Download trafficLight library from the following link. Unzip and paste the downloaded library to Arduino libraries folder. Restart Arduino IDE and open the example program from File -> Examples -> trafficLight -> trafficLight. Upload the program to your NodeMCU. Program compiled and tested on Arduino-1.8.12.

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Cascading two 32-bit shift register modules using Arduino UNO

Cascading will help you to create multiple outputs. Similarly, you can cascade more modules.

Purchase the module from https://haberocean.com/product/32-bit-serial-in-parallel-out-shift-register-module-using-74hc595/

Upload the following program to Arduino UNO. Change the value in customDelay() function to change the speed of running LED.

/* Shift Register Example Turning on the outputs of a 74HC595 using an array Hardware: * 74HC595 shift register * LEDs attached to each of the outputs of the shift register */ //Pin connected to ST_CP (12) of 74HC595 int latchPin = 12;
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32-bit shift register module using 74HC595 controlled using Arduino UNO

Here, we will see the circuit to interface a 32-bit serial-in parallel-out Shift register module using Arduino UNO. Shift register module is powered from Arduino UNO.

This module will help to create 32 digital outputs from only 3 digital pins of Arduino. Purchase the module from https://haberocean.com/product/32-bit-serial-in-parallel-out-shift-register-module-using-74hc595/. This module can be used in applications where more digital outputs are required such as LED cube, LED matrix etc.

Upload the following program to Arduino UNO.

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Neopixel ring colour picker App using Flutter through NodeMCU

This is an App developed in Flutter to set your desired colour on Neopixel ring from a mobile App. Circuit is done as shown in the following diagram.

Download the NeoPixelColorPicker library from the following link. Unzip and copy the downloaded library to your Arduino libraries folder.

NeoPixelColorPickerDownload

Restart the Arduino software and open the example program from File ->

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16-bit shift register module using 74HC595 controlled through NodeMCU

16-bit shift register module will help you to create 16 digital outputs from only 3 digital outputs of NodeMCU. Circuit is done as shown in the diagram. Upload the following program to your NodeMCU.

/* Shift Register Example Turning on the outputs of a 74HC595 using an array Hardware: * 74HC595 shift register * LEDs attached to each of the outputs of the shift register */ //Pin connected to ST_CP (12) of 74HC595 int latchPin = 0;
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Real time temperature monitoring and device control from mobile App developed on Flutter through NodeMCU

A temperature monitoring system which will turn ON a device such as cooling fan, when the temperature is increased above an upper threshold. Similarly, device will be turned OFF when the temperature is decreased below lower threshold. In between lower threshold and upper threshold, device will continue its state. Circuit is done as shown in the following diagram.

Download the TemperatureMonitorAndDeviceControl library from the following link.

TemperatureMonitorAndDeviceControl-newDownload

Unzip and copy the downloaded library to Arduino libraries folder.

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Real time monitoring of temperature from NodeMCU,  on mobile App developed on Flutter

This is a basic app for real time monitoring of temperature from NodeMCU. NTC thermistor is used as the temperature sensor. Mobile device will send HTTP request on every three seconds periodically to get the temperature from NodeMCU. Circuit is done as shown in the following diagram.

Download TemperatureMonitor library from the following link. Unzip and copy the downloaded library to Arduino libraries folder.

TemperatureMonitorDownload

Restart Arduino software and open the example program from File -Examples -TemperatureMonitor -TemperatureMonitor.

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Read temperature from NodeMCU through mobile app developed on Flutter, on button press

This circuit and programs will help you to send HTTP request from the mobile device through an App to read the temperature from NodeMCU. NTC thermistor is used as the temperature sensor. Temperature will be updated when the “Read temperature” button is pressed. Circuit is done as shown in the following diagram.

Download TemperatureMonitor library from the following link. Unzip and copy the downloaded library to your Arduino libraries folder.

TemperatureMonitorDownload

Restart Arduino software and open File ->

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Mobile App using Flutter to Turn On and Turn OFF LED through NodeMCU

This is a basic project for beginners who want to control an LED from a mobile device. Circuit is done as shown in the diagram. NodeMCU is used as the controller in Circuit.

Download the LEDcontrol library from the following link.

LEDcontrolDownload

Unzip and copy the downloaded library to your Arduino libraries folder.

Restart Arduino software and open

File ->

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