Real time temperature monitoring and device control from mobile App developed on Flutter through NodeMCU

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

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

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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Temperature monitoring system over WiFi using NodeMCU and NTC thermistor

Temperature monitoring system over WiFi using NodeMCU and NTC thermistor

Download the TemperatureMonitor library from following link.

TemperatureMonitorDownload

Unzip the library and copy to the Arduino libraries folder. Program compiled and tested successful on Arduino 1.8.12.

Now, open the program from File -> Examples -> TemperatureMonitor -> TemperatureMonitor.

Compile and upload the program to NodeMCU.

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Temperature monitoring and device control system over WiFi

Temperature monitoring and device control system over WiFi

Program. Tested on Arduino version 1.8.8.

Upload the following program to your NodeMCU. It is a direct communication between your mobile device and NodeMCU. So, after uploading the program, search for available WiFi devices on your Android device. In the available WiFi devices, you could see a device named Cooling-Fan-Controller. Connect to that device by using the password given at the beginning of program. Then open a web browser on your Mobile device and open 192.168.4.1.

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