ESP32

Frequently Asked Questions – CO2 Gadget

3 July 20262 July 2026 by Bautista

Answers to frequently asked questions about CO2 Gadget.

Why CO₂ Gadget? – Reasons to use this firmware

3 July 20262 July 2026 by Bautista

Find out why CO2 Gadget is the best.

Migration from CO2 Easy to CO2 Gadget

3 July 20262 July 2026 by Bautista

Step-by-step guide to migrating from CO2 Easy to CO2 Gadget.

ESP-NOW CO2 Gadget Guide: Long-Range Communication

3 July 202622 June 2026 by Mariete

ESP-NOW Guide for CO2 Gadget. Long-range communication for your high-quality CO₂ sensor: configure peer MAC, Board ID, transmission interval and MQTT gateway.

Gadget’s BLE CO₂ Guide: MyAmbiance, BTHome and Real-Time Data

3 July 202622 June 2026 by Mariete

Gadget’s BLE CO₂ Guide. Connect your high-quality CO₂ monitor to the Sensirion MyAmbiance app: real-time data, downloadable history, Wi-Fi setup via Bluetooth and calibration.

CO2 Gadget Installation Guide: Web Installer, Binaries and Compilation

3 July 202622 June 2026 by Mariete

Complete guide to installing CO2 Gadget. One-click web installer, table of 13 boards with ‘INSTALL’, binary downloads, compilation with PlatformIO and troubleshooting.

CO2 Gadget WiFi Guide: Connection, Website and API

3 July 202622 June 2026 by Mariete

CO2 Gadget WiFi Guide. Learn how to connect your high-quality CO₂ monitor to the network: captive portal, MyAmbiance app, web interface, REST API, mDNS, static IP and troubleshooting. CO2 Gadget, the firmware that turns your ESP32 into a professional CO₂ monitor.

Real Solar Panel Power: Are AliExpress Sellers Misleading Us?

20 December, 20259 December, 2025 by Mariete

Miniature with a solar panel on yuan banknotes, a man's surprised face and large text in Spanish asking if the Chinese solar panels on AliExpress are cheating.

Have you bought a 1W or 2W mini solar panel and it doesn't perform as expected? Find out why lab specifications do not guarantee real performance.

Low-Power Solar Panels: MPPT is the Secret to Running Your ESP32 on Just 1W

16 February 20268 December, 2025 by Mariete

Several small solar panels stacked next to a microcontroller-type electronic board on a sandy beach and turquoise sea with a blue and white umbrella, accompanied by the large text at the top "LOW POWER SOLAR PANELS" and at the bottom "THE SECRET IS MPPT!

We’ve seen lots of brilliant DIY projects using solar panels, but the reality is that energy efficiency is a real challenge. If you’ve tried to power an ESP32 or a Raspberry Pi with a small solar panel and failed, you’re not alone. This post complements our project on Enerlogic — Energy Wizard and … Read more

Controlling the electronic load with MOSFETs with an ESP32 - Basics

20 March 202628 November, 2025 by Mariete

Microcontrollers and electronic components for ESP32, ESP8266 and Arduino projects at emariete.com.

Learn how to control an electronic load with MOSFETs and an ESP32, improving your projects with automation, graphs and tests from the browser.