eSIM (Embedded SIM) is an evolution of the SIM card for mobile phones and connected objects. Although the size of SIM cards has been reduced more and more, some "new" communicating objects, such as smartwatches, no longer have enough room to integrate a SIM card, even in nano format. And, above all, it is quite complicated to change the SIM card on connected objects. It was then decided to develop … [Read more...]
What is a Smart Speaker?
A smart speaker is an Internet-connected speaker that transmits music or voice wirelessly and integrates the functions of an intelligent personal assistant (IPA) via non-invasive voice control and speech recognition. No uniform term has yet developed for these devices, which is why terms such as intelligent loudspeakers and networked loudspeakers are also used to denote them. The speaker … [Read more...]
How To Easily Create Android App Controlled Local Devices With ESP32
For DIY IoT setup, we already have guides with IBM Watson IoT. In those guides, we have mentioned an Android App named "HTTP Shortcuts" for making the thing a bit smarter and professional. You'll not need to set up IoT to only locally control a device, for example, a water pump probably does not need control over the internet. In these cases, you only need Wi-Fi. Here is the code snippet for … [Read more...]
What Are the Problems of Smart Switches and Smart Sockets
Automation does not always need microcontrollers and Wi-Fi. The ICs, transistors and basic sensors can help to automate a lot of things. Smart sockets and smart switches are definitely great tools to control electronics of one house from another house. But, we are a necessity to tell you the potential problems and limitations of smart switches and smart plugs. Smart switches and smart plugs … [Read more...]
What is an Open Source Hardware?
Open Source Hardware is a piece of hardware that is manufactured according to the free blueprints. The movement and idea are close to or goes back to the Free Software, Open Source and DIY movement. Even if "open source hardware" often has a lot in common with open source software, "open hardware" can also take place far away from software technology: For example, the project "Open Source Car" … [Read more...]
Raspberry Pi Pico vs ESP32
You can get the Raspberry Pi Pico on Amazon for just under $4 plus shipping costs. The much older ESP32 you get in various forms for just under $10. You see, you get the ESP32 for a little more money with additional sensors or a display to display sensor data (or even the IP address of the microcontroller) or a camera. On the Raspberry Pi Pico, there are quite new chip RP2040 installed which was … [Read more...]
How to Make ESP32-CAM IP Camera Access from Anywhere in the World
First and foremost thing to warn - you can not compare the pro-grade IP cameras, something like EZVIZ IP camera with ESP32-CAM IP camera. ESP32-CAM IP camera module is dirt cheap and it is great to increase the number of video capturing devices. I would suggest you have some pro-grade camera to cover the main unsecured points of house/office and use ESP32-CAM IP camera module as an "add-on" to … [Read more...]
How to Test USB to TTL Converter
A USB-to-TTL adapter (USB-to-UART adapter, USB-to-UART bridge) is a USB device that lets us connect a device with TTL/UART port to our PC through the regular USB port. We can use it to update firmware on routers, modems, mobile phones, hard disks, and so on. For testing AT Commands, we need a USB-TTL module built on CP2102 IC. For the sake of proper description, we will describe how to wire The … [Read more...]
How to Use PWM in ESP32
Pulse Width Modulation (PWM) is a widely used technique for power delivery. ESP32 has dedicated hardware for PWM. Pulse-width modulation (PWM) of a signal or power source is a technique in which the duty cycle of a periodic signal (a sinusoidal or a square signal, for example) is modified. The duty cycle of a periodic signal is the relative width of its positive part relative to the period. … [Read more...]
ESP32 IoT Setup For Concealed Conduit Wiring
In this article, we will discuss the electrical wiring required to set up a DIY IoT smart control system to control 8 3W spotlights, one ceiling fan and one Indian jhar bati (chandelier lamp). We have a total 8 number of connections where 8 out of 8 are dimmable and we are using the traditional piano/rocker switches. We have discussed about interfacing the piano/rocker switches with ESP32. We … [Read more...]
Rotary Hammer vs. Demolition Hammer
A rotary hammer is the big brother of the home drill. The rotary hammer vs demolition hammer is a debate as in some cases, you will be able to complete the same work with any of the tools. But they do come with their unique benefits and that is the reason for publishing this article. A rotary hammer is a drill that uses rotation and a hammering action that can be used to break up the concrete. … [Read more...]
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