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You are here: Home » Hardware

By Abhishek Ghosh March 23, 2019 9:47 pm Updated on March 23, 2019

Hirose U.FL Connector and Antenna for Wi-Fi (Pi Zero, ESP32)

Hirose U.FL connector and antenna required for Wi-Fi in some models of Pi Zero, ESP32. U.FL/IPX connector commonly used on PCB of everyday electronics. U.FL/IPX to SMA adapters sold in the market. Often, the name of the unit not known to many of the makers. Hirose Electric Company Limited is a Japanese electronics company specializing in the manufacturing of electric connectors, flexible … [Read more...]

By Abhishek Ghosh March 22, 2019 8:58 pm Updated on March 22, 2019

ESP32 Arduino Built-in Hall Sensor Code & Theory

ESP32 has a Hall Effect Sensor near pin 22, just below and middle of the inscription "ESP32-WROOM-32", inside the metal cover. Hall effect sensors measure the magnitude of a magnetic field as output voltage. Hall effect sensors are used for proximity sensing, positioning, speed detection, and current sensing applications. Hall sensor when combined with threshold detectors act as a switch. That is … [Read more...]

By Abhishek Ghosh March 21, 2019 7:12 pm Updated on March 21, 2019

How to Invert Signal for Arduino (HIGH to LOW or the Reverse)

Such need is common when then need interfacing for IoT with household gadgets. Here is How to Invert Signal for Arduino (HIGH to LOW or the Reverse). One way is using some kind of relay module, which we described in our guide to interface with doorbell. This is normally a problem with devices that are active LOW. Since most devices are active HIGH, meaning they are triggered by a HIGH voltage, … [Read more...]

By Abhishek Ghosh March 20, 2019 5:25 pm Updated on March 20, 2019

How to Interface/Connect Doorbell Switch with Arduino ESP32 Pushbutton

We have different types of doorbell projects such as Arduino doorbell with 3 LEDs, ESP32 Arduino which sends push notification on button press. We Need to Connect Our Electric or Battery Operated Doorbell With the Project to Make it Functional. Here is How to Interface/Connect Doorbell Switch with Arduino ESP32 Pushbutton. Commonly projects all over the internet ends describing from sending … [Read more...]

By Abhishek Ghosh March 18, 2019 12:54 am Updated on March 18, 2019

Connecting ESP32 Arduino with DHT11 with IBM Watson IoT

Earlier, we described how to create graph on IBM Watson IoT dashboard by using the default widgets. In previous guide, we described how to use ESP32 Arduino with DHT11 sensor. Here is the Code and Diagram to Connect ESP32 Arduino with DHT11 with IBM Watson IoT and Get Odometer Like Gauges on Dashboard. For this guide, you will need : Reading the above linked guides for setup and materials … [Read more...]

By Abhishek Ghosh March 17, 2019 6:21 pm Updated on March 17, 2019

ESP32 Arduino with DHT11 Sensor : Connection & Code

Here is Connection & Working Code for ESP32 Arduino with DHT11 Sensor. We will use Adafruit's libraries for DHT11 and DH22 Temperature Humidity Modules. For using DHT11, DHT21, DHT22 with non-ESP32 Arduino please read our previous guide on Arduino Temperature Humidity Sensor. For ESP32, it is mandatory to have the common required setup for Arduino IDE (ESP32 does not work with Arduino IDE out of … [Read more...]

By Abhishek Ghosh March 13, 2019 11:50 am Updated on March 13, 2019

High Quality ESP32 Development Boards Vs Cheap ESP32 Clones

How High Quality ESP32 Development Boards Vs Cheap ESP32 Clones Comparison Goes? Why Adafruit HUZZAH32 board costs higher than the generic ESP32 boards, like we recently shown some ESP32 projects with? You can simply run a Wi-Fi scan and compare the result with your Wi-Fi scanning capabillity of Samsung smartphone or laptop. Adafruit Huzzah32 Feather is a standard development board with … [Read more...]

By Abhishek Ghosh March 12, 2019 6:40 pm Updated on March 12, 2019

Base64 Encoding on ESP32 Arduino (Base64 for Images)

Base64 images are easy to transmit over the network. Base64 encoding of images for CSS is highly discussed on our blog. Base64 is not new to our regular readers but the current application is different. Here is How to Use Base64 Encoding on ESP32 Arduino. ESP32 lacks sufficient RAM which limits the actual capabillity. You can actually use HTTP POST (like we have shown with IBM Watson IoT … [Read more...]

By Abhishek Ghosh March 11, 2019 9:46 am Updated on March 11, 2019

ESP32 Arduino : Get Time & Date From NTP Server

Here is ESP32 Arduino How to Get Time & Date From NTP Server and Print it. This is upgrade of the projects where an event requires a timestamp, for example think of LED turning on after push button click or HTTP POST on button click. These events better to have a timestamp. Of course most robust way of adding timestamp using a real time clock (RTC) module with ESP32. However, RTC modules … [Read more...]

By Abhishek Ghosh March 10, 2019 10:52 am Updated on March 10, 2019

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...]

By Abhishek Ghosh March 10, 2019 1:53 am Updated on March 10, 2019

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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