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Detailed article on computer hardware parts like RAM, Motherboard, Processor, Graphics card. Hardware also covers topics on hardware of Server, Single Board Computers like Raspberry Pi to Libre Hardware Projects.

Galaxy Watch LTE Versus Active 2 LTE

They are not comparable as watches. They can be compared only for the specification part. These two watches are different for their look, not exactly they are too different from the specification point of view. May be, Samsung wanted two watches, one with a masculine sports design and another with a normal watch look. Over 5 years, smartwatches evolved in design and in the functionalities they … [Read more...]

Samsung Smartwatch as Proximity Switch : Part IV

In the previous part of this topic (here is part III), we provided a sample code to create a basic BLE scanner. The code makes the ESP32's on-board LED to turn on whenever the watch comes in proximity. In our earlier parts of this series, we talked about filtering the MAC address and practical matters around Samsung Galaxy Watch. I found that the website circuitdigest.com worked with a similar … [Read more...]

Samsung Smartwatch as Proximity Switch : Part III

Instead of publishing a single article on a complex matter, we split into parts. This methodology makes the thing boring to the initial readers but in the long term, the readers can browse our website and fix themselves. In the previous two parts of this topic (here is part I and here is part II), we created the base with theory and practical so that even an unused reader does not get confused or … [Read more...]

Samsung Smartwatch as Proximity Switch : Part II

This second part of the guide (here is the first part) ideally should have the working code matching with the title! But, ESP32 with Arduino IDE is not completely bug-free with BLE. So, instead of directly going to the topic, it will be practical for us to show some basic example codes which the readers can test on their setup. Not all of the readers can be expected to be used with BLE of ESP32 … [Read more...]

Samsung Smartwatch as Proximity Switch : Part I

It is not just easy to use the BLE of Samsung Galaxy Smartwatch. Because BLE of Samsung Galaxy Smartwatch is designed to work with their intended purposes, such as Samsung Flow software. Reading our previous article on GATT will help to understand the basic things we need to know to work with ESP32. We need to obtain the BLE hardware address, Service UUID and Characteristic UUID of the server. … [Read more...]

What is GATT (Generic Attribute Profile) of Bluetooth LE?

Our goal is to make our developer readers aware of GATT. Previously, we have discussed about Bluetooth, iBeacon and some theories on Internet of Things (IoT) such as Communication Standards for Wearable Computing, Influence of the Internet of Things (IoT) on Retail which eventually talked around the topic Bluetooth LE. "GATT Services are collections of characteristics and relationships to … [Read more...]

Send-Receive Message on PC Over Bluetooth From ESP32 Arduino

This guide intended to be for somewhat advanced users of Arduino and Windows 10. We are using ESP32 setup with Arduino IDE in this mentioned way. We need PuTTY as extra software. Unfortunately, ESP32 with Arduino libraries and Windows 10 is far from being perfect. The original target of this guide is to complete these steps : ESP32 will remain connected with the Windows 10 PC via USB for … [Read more...]

Explanation of the ESP32 Vulnerability Warnings

The ESP32 we commonly use in electronics development as an upgrade to the official Arduino boards was discovered in September to have four different WiFi vulnerabilities for the whole ESP SoC family (not exclusively ESP32). Espressif has already patched around most of the vulnerabilities. It is practical to know minimum details of the exploits at least to upgrade the firmware to the latest … [Read more...]

Connect ESP32 Arduino With a Samsung Smart Watch

We can create an ESP32 Web Server, connect & control LED from watch browser. Although it sounds too complicated work, it is easy. If we can connect an ESP32 Arduino with a Samsung Smart Watch and control it, then we can add various DIY peripherals with sensors such as DHT11/22. Obviously we can make it more complex by adding IoT services such as from IBM Watson IoT, like we can extend the AC … [Read more...]

Samsung Galaxy Watch PSD Template

To use the files included in this guide, one should learn how to connect Samsung Galaxy Watch with Galaxy Watch Designer. As prerequisites, we need a laptop (or any computer) which has Wi-Fi, JDK 8 installed and configured, Google Chrome browser, Tizen Studio & Galaxy Watch Designer installed. The Tizen Studio IDE total installation will be of around 5 GB. For using these files, only the … [Read more...]

Connect Galaxy Watch to Tizen Studio & Galaxy Watch Designer

First, we should learn how to connect Samsung Galaxy Watch with Tizen Studio & Galaxy Watch Designer. Later we can develop & run our apps. The documentations written by Samsung is not just bad but also not just easy to understand and do. At worst, the software and firmware have bugs. After reading this guide, your watch development projects will become smooth like working with Arduino … [Read more...]