Guides

BMP280 Explained: How It Measures Pressure and ...

The BMP280 measures barometric pressure and temperature over I2C or SPI and is commonly used to estimate altitude. See a real ESP32 weather station build, its wiring, and its auto-generated...

BMP280 Explained: How It Measures Pressure and ...

The BMP280 measures barometric pressure and temperature over I2C or SPI and is commonly used to estimate altitude. See a real ESP32 weather station build, its wiring, and its auto-generated...

Soil Moisture Sensor Explained: How It Works an...

How a resistive soil moisture sensor works, analog vs digital output, wiring it to an ESP32, and why the probes corrode over time -- with a real automatic watering build...

Soil Moisture Sensor Explained: How It Works an...

How a resistive soil moisture sensor works, analog vs digital output, wiring it to an ESP32, and why the probes corrode over time -- with a real automatic watering build...

LDR Light Sensor Explained: How It Works and Ho...

A complete guide to the LDR light sensor module: how photoresistors detect light, the DO vs AO pins, day/night invert logic, and a real Arduino Uno build with generated firmware.

LDR Light Sensor Explained: How It Works and Ho...

A complete guide to the LDR light sensor module: how photoresistors detect light, the DO vs AO pins, day/night invert logic, and a real Arduino Uno build with generated firmware.

Compoden Soldr assistant live build tray for an HX711 load cell amplifier digital weighing scale project with Arduino Uno

HX711 Explained: How to Read a Load Cell and Wi...

A technical guide to the HX711 load cell amplifier: how it works, how to wire it to an Arduino Uno with just two digital pins, and how to calibrate it...

HX711 Explained: How to Read a Load Cell and Wi...

A technical guide to the HX711 load cell amplifier: how it works, how to wire it to an Arduino Uno with just two digital pins, and how to calibrate it...

HC-SR501 PIR Motion Sensor Explained: How It Wo...

A complete, fact-checked guide to the HC-SR501 passive infrared motion sensor, with a real Arduino Uno build and real generated firmware.

HC-SR501 PIR Motion Sensor Explained: How It Wo...

A complete, fact-checked guide to the HC-SR501 passive infrared motion sensor, with a real Arduino Uno build and real generated firmware.

DHT22 Explained: How It Measures Temperature an...

How the DHT22 (AM2302) measures temperature and humidity, how its single-wire protocol works, and how to wire it to an ESP32 -- with a real live-built ESP32 + DHT22 project...

DHT22 Explained: How It Measures Temperature an...

How the DHT22 (AM2302) measures temperature and humidity, how its single-wire protocol works, and how to wire it to an ESP32 -- with a real live-built ESP32 + DHT22 project...