Electronics, ESP8288 and ESP32, Arduino, CNC, Model aircraft and more

Featured articles:

A homemade CO2 meter with Wifi against the coronavirus. The CO2 Easy
CO2 Easy: Homemade CO2 Meter with WiFi

Build your own CO2 meter easily in one afternoon

CO2 Meter TFT Color Display with TTGO T-Display Sensirion SCD30 - The CO2 Gadget
CO2 Gadget,

Small and discreet CO2 meter with mobile App. It measures air quality discreetly and at all times.

previous arrow
next arrow

About Mariete's Blog:

In this blog you will find useful and fun information about the things I'm passionate about, and which, I imagine (since you're here), you are too. My motto is "Not a day without thinkering" and I try to do it. Maybe not every day I set out to solder an electronic project, or to program, but rare is the day that I don't search for information and spend some time learning, while I think about what can i do next.

ESP-NOW Gateway to MQTT over WiFi

I bring you my ESP-NOW to MQTT bidirectional Gateway project with the firmware I have written for ESP32 and an explanation and advantages of the ESP-NOW protocol. A simple gateway ...
Read more

CO2 Gadget Boxes, 3D Printed and without 3D Printer

A 3d printed box is the perfect complement to the CO2 Gadget meter although, as you will see, it is not the only possible solution and there are also easy-to-make boxes, ...
Read more

Winsen Low Consumption CO2 Sensor MH-Z1311A

There's a new kid in town among the NDIR CO2 sensors. An old / new acquaintance in the maker community. Discover what we are finding out about this new sensor by ...
Read more

Cellular Polypropylene (PP) Boxes

I bring you a great idea! We are going to see how to easily make boxes for our projects in a homemade way, with cheap and easy to get materials. In this case you are going to ...
Read more

CO2 Gadget: Advanced CO2 Meter

CO2 Gadget is a firmware to create high quality CO2 meters, with optional sensors of suspended particles, temperature, humidity, atmospheric pressure and others that allow us to analyze ...
Read more
CO2 Meter TFT Color Display with TTGO T-Display Sensirion SCD30 (Bluetooth LE)

CO2 Meter TFT Color Display with TTGO T-Display Sensirion SCD30 - The CO2 Gadget

A high-quality CO2 meter with a color screen and connection to your mobile via bluetooth that you can take anywhere thanks to its rechargeable battery (optional) ...
Read more

Sensirion SCD30 NDIR dual-channel CO2 sensor

The SCD30 CO2 sensor from the manufacturer Sensirion is one of the best options when deciding on a sensor for our CO2 meter. In some cases ...
Read more

CO2 Monitor on your cell phone with ESP32 and Sensirion SCD30 sensor [BASIC VERSION]

Welcome to this tutorial in which you will learn how to build the basic version of the CO2 meter with App for Android and iOS, using Bluetooth, following the official project of the ...
Read more

Sensirion SCD4x CO2 sensor (SCD41 and SCD40)

Do you want a small, low-consumption, versatile and quality CO2 sensor? It's quite likely that the Sensirion SCD41 CO2 sensor (and its twin the SCD40) is the ...
Read more

DIY CO2 Monitor with Ultra Low Power Consumption

Would you like to have a CO2 meter powered by cells or batteries with an ultra-low consumption and a range of several weeks, or even months? In this article ...
Read more

CO2 meters with Arduino, ESP8266, ESP32, etc.

CO2 measurement has become very important to me and many blog users.

Here you will be able to find lots of useful information, if you want build a CO2 meter.

Tutorials for building CO meters, CO2 sensor comparisons, sensor analysis, unboxings of commercial CO2 meters, schematics, options, etc.

Projects with ESP8266, ESP32 and Arduino boards

From how to get started with download the Arduino IDE and its installation, going by how to program an arduino, to pinout (what is each pin or "leg" for).

You will find articles about the differences between an Arduino Uno and an Arduino Nano and when to use each board or tutorials on how to write Arduino programs, called Sketches. Of course everything in Spanish (although there is an automatic translation into English, and I try to manually translate the most important posts).

I write articles periodically, so it is very important that you subscribe to receive the news. Do it now, before you forget it!

RC Model Aircraft (Radio Control)

I love the radio controlled model aircraft. I've been practicing it for more years than you would think and I've flown planes, drones and helicopters, both electric and Glow or gasoline (that is, explosion engine). I love the FPV, especially if it is Long range (Great Reach), and above all, caching.

Don't stop subscribing, because I have material to write a lot of very interesting articles and I plan to write them little by little.

3d printers

I am a big fan of 3D printers. I find it an amazing technology and a cross-cutting hobby because it helps me in the rest of my hobbies.

I started in 2014, with a PS3 Steel that I built by ordering parts from half the world, I still have this printer, and for a few years I have had a Creality CR-10S and the truth is that I am delighted with it, although I have made quite a few modifications. I have to say that for some things I still use the PS3 Steel because I have it "very fine" and it gives me better quality (depending on what things, as I say).

The first thing I did was install a 750 watt silicone heated bed at 220V, the following add auto leveling of the heated bed with BL Touch, then replace the controller with one of 32 bit. I will be writing articles about these things because I took photos of many of them and even recorded a video.

Homemade CNC Machine (Numerical Control Milling Machine)

3D printers gave me a lot of satisfaction and whetted my appetite to build more things, and it was inevitable ... the following was build a homemade CNC milling machine with Arduino (also called control milling machine numeric). Don't miss the articles I have written about it (and continue to write) because it is an incredible machine for working with wood, aluminum, plastics, making printed circuit boards and much more.

Laser engraving machines

And, yes, once again one thing led to another. I started by add a diode laser to the CNC milling machine but right away I built one CNC Laser dedicated with aluminum profiles and shortly after I bought a laser engraver CO2 really, it has allowed me to do a lot of things. Of course I have done so many modifications to the CO2 laser engraver it already looks little like the one I bought.


There are many other things in the world of electronics that I do, from designs, modifications, repairs, radio frequency, etc.. I'll be writing about it.

Where do I begin?

As you see i have many pending things to write about and I have to prioritize. I need help deciding what to write first. Share my Facebook page by clicking on the icon below and then tell me on my facebook page What do you want me to write. 

Above all, do not forget to subscribe, just below, so you do not miss anything.Do it now, do not forget!