This section covers electronics projects based on NodeMCU ESP8266 board. The NodeMCU is basically an open source firmware, and also commonly used term for the popular ESP8266 Development Board, which is a low cost, development board designed for IoT applications.
MQTT is a protocol used to send and receive messages over internet. We previously used this protocol in Iot Electricity meter and Raspberry Pi Alexa to publish the data on internet. In this tutorial we will get to know more about the MQTT and the terms related to it. Here we will use the Raspberry Pi as local MQTT broker and control an LED connected to NodeMCU ESP12E through…
Microcontrollers have small internal memory which is not enough to save sensors generated data for long time, either you have to use some external memory device or can save the data on some cloud using internet. Also, sometime it becomes difficult to manage when the sensor is deployed in some extreme condition site where human cannot reach or it is difficult to visit there…
Have you ever thought of controlling any peripheral from anywhere in the world? Yes the IoT (Internet of things) has made this possible to control any appliance from anywhere and there are many IoT hardware and cloud platform are available to achieve this. We have covered many IoT applications in our previous tutorial. Today we will use Google Firebase cloud to control an…
As we know that IoT revolution has started from last few years, since then ESP series Wi-Fi modules become very popular among hobbyists and industries. It is a very small chip and can be embedded in small devices. Also, it is cost effective and anyone who knows the basics of Arduino programming can program it and use it in their projects to make it an IoT enabled device.…
Humidity, Temperature and Pressure are three basic parameters to build any Weather Station and to measure environmental conditions. We have previously built a Digital Thermometer web server using NodeMCU and this time we are extending it to Weather Station using ESP12E NodeMCU. In this project, we will measure Humidity, Temperature and Pressure parameters and…
Have you ever thought of getting your device’s location without using any GPS hardware? Sounds interesting!! Yes it is possible to get the location coordinates just using NodeMCU ESP board without any extra hardware. Here we will use ESP12E board to get live co-ordinates of our location. This becomes possible because of Google’s Geolocation API. So let’s see how this…
How cool it be to turn on the lights automatically as soon as you enter in your home and turn it off again when you leave! Yes, a simple application can do this for you. Here in this project, we will use ESP32 as BLE client and fitness band as BLE server, so whenever a person wearing the fitness band comes in the range of ESP32 Bluetooth, the ESP32 detects it and turn on the…
Wireless Headphones, Fitness bands, Bluetooth Speakers, In-Ear headphones, Mobile phones, Laptops... there are so many Bluetooth devices around us and most of these devices are battery operated. Have you ever wondered that, when you connect a Bluetooth device to your mobile phone how it automatically understands that the connected device is a computer or audio device or a…
Bluetooth modules like HC-05 and HC-06 are easy to set-up and quick to use with Arduino IDE, but they have their own limitation like high power consumption and they operate on the old Bluetooth V2.0. Also, recently I got myself a new ESP32 DEV kit, these modules has a punch of features like in-built Wi-Fi and Bluetooth, ample ADC and DAC pins, Audio Support, SD Card Support…
Note: This tutorial was written after Arduino has officially launched its support for ESP32 boards. So if you have followed the old method of using GIT to install the boards then you would have to follow these steps again (highly recommended) if you need support for new libraries. If you are working with ESP32 for first time you do not have to worry about this.
…
Have you ever thought about jamming the Wi-Fi connection network? Now days Wi-Fi password hacking is very common, so by jamming the Wi-Fi network you can block or jam any Wi-Fi connection, and no one is able to connect to that Wi-Fi network even after knowing the password. This can be done with a tiny Microcontroller ESP12E, which is also referred as Wi-Fi module or NodeMCU…
In previous tutorial, OLED is interfaced with ESP32 using SPI communication which uses 5 pins. In this tutorial, we interface 16x2 LCD with ESP32, using only 2 pins, with the help of I2C communication. It reduces number of pins used by ESP32 so that more number of ESP32 pins remain free for interfacing different sensors.
What is I2C…
