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Arduino ESP32 : HTTP(S) POST Request to IBM Watson IoT on Button Press

Here is How to Send an HTTP POST Request to IBM Watson IoT on Button Press from Arduino ESP32. The basic is dependent on our earlier two separate examples, first is the set of working examples of codes for IBM Watson IoT and second is the example of using a button press to make a LED turn on for a pre-defined time. Earlier, we had another example of using Blynk to send a basic push message on a … [Read more...]

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Arduino ESP32 : Turn on LED on Button Press and Turn Off After a Period

Here is How to Turn on LED on Button Press and Turn Off After a Period on Arduino ESP32. For this guide, we will use the onboard boot button and the onboard LED of ESP32. You can not use the EN button of ESP32 for this purpose. The onboard boot button is attached to Pin 0 and the onboard LED of ESP32 attached to Pin 2. This guide has more usage on advanced projects of IoT. Instead of LED, … [Read more...]

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ESP32 Arduino : Base Board, Battery and Battery Charger

Here is Ideas Around Base Board, Battery and Battery Charger for ESP32 Arduino for Prototyping. It is not easy to place ESP32 on breadboard and use all the pins. The form factor of WROOM ESP32 board we are using is pathetic. Adafruit Huzzah32 is beautifully designed but not easily available in all the countries. Huzzah32 is not good investment unless the boards/wings are easily available. … [Read more...]

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ESP32 Arduino : Create a Webpage to Control a Relay Module

Here is How to Create a Webpage to Control a Relay Module Using ESP32 Arduino. For this project, one needs to setup ESP32 with Arduino in the manner we described earlier. It is a Wi-Fi based project (not IoT). This is a basic example which provides the base of advanced projects. Previously we published few basic projects with relay. Use separate DC voltage supply for the relay (avoid AC for … [Read more...]

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Arduino ESP32 Basic Graphing/Visualization on IBM Watson IoT Platform

To follow this guide, the reader requires to complete few steps. First, having an ESP32 board. Second, configuring Arduino IDE on the computer to use with ESP32, third step is the setup of IBM Cloud account to connect ESP32, forth step is looking at our 3 example codes to use on IBM Watson IoT platform. Newer version of IBM Watson IoT platform has some widgets available which avoid the … [Read more...]

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Steps of ESP32 MicroPython Setup with uPyCraft IDE

In the previous article, we introduced to MicroPython. Here are the Steps of ESP32 MicroPython Setup with uPyCraft IDE. It is very easy to setup from GUI and blink the onboard LED of ESP32. We will guess that the reader already configured Arduino IDE with ESP32 (thereby the USB Serial drivers are already installed). Setup are near same for Windows 10, MacOS and Linux. Essentially you need to … [Read more...]

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LED Bar Graph Progress Test : Arduino & Transistors

Previously, we have discussed about LED Bar Display. If you do not have LED Bar Display, you can use common LEDs for testing purpose. Here is Circuit and Code to Create LED Bar Graph Progress Test Project. We Will Shown the Project With Arduino and Als Only With Components Like Transistors. Basic matter of this project is that - we are using a potentiometer as analog input. When we rotate the knob … [Read more...]

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Arduino Pulse Sensor and Heart Rate Plotting

Arduino pulse sensor is quite commonly seen in various example projects using the typical sensor first made by pulsesensor.com. The sensor has a positive connection, a negative connection and an analogue data pin. It is quite easy to connect it with Arduino. pulsesensor.com has lot of examples and library of codes. For Mac, they have an app too. Pulse sensor module is important cheapest biomedical … [Read more...]

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Best Power Bank Buying & Maintaining Guide

Power Bank becoming an everyday need as our smartphones, wireless headphones increasingly becoming power hungry. Here is timely article providing technical details of the power bank for buying & maintaining. Kindly avoid buying China manufactured cheap power banks. There are several ISO standards related to power bank. Officially, a Power Bank is a lithium-ion powered portable external battery … [Read more...]

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Arduino Shift Register 74HC595 Library (For LED)

Of course 74HC595 can do more than just controlling dumb LEDs but LEDs is what commonly used to give example of how 74HC595 works and LEDs are used in decoration. Arduino shift register 74HC595 library makes prototyping with LED easy & fast. Furthermore, the user can add more features or examples to the library or it's fork to make it more useful to the new Arduino users. For this guide, the … [Read more...]