Passive Infrared (PIR) motion sensors are one of the simplest and most effective ways to detect motion in a room. Combined with an ESP32, they provide extremely fast, local, cloud-free motion detection that integrates perfectly with Home Assistant. This guide…
DS18B20 digital temperature probe lets you precisely measure temperatures in wet environments with a simple 1-Wire interface. The DS18B20 provides 9 to 12-bit (configurable) temperature readings over a 1-Wire interface, so that only one wire (and ground) needs to be…
The SHT45 is currently one of the most accurate temperature and humidity sensors available.It offers laboratory-grade precision, ultra-low power consumption, and very stable measurements. This guide shows you how to connect an ESP32 + SHT45 to Home Assistant using two…
Real-time energy monitoring is one of the most valuable additions to a smart home. The PZEM-004T module provides accurate measurements of: When combined with an ESP32, it offers a powerful, inexpensive way to send energy data directly into Home Assistant.…
ESP32 microcontrollers include multiple hardware timers that can trigger interrupts with microsecond precision. This makes them perfect for generating pulses, reading sensors, simulating RPM or speed signals, or scheduling tasks without blocking the loop(). In this article, we walk through…
The BME280 is one of the easiest sensors to integrate into Home Assistant for live temperature, humidity, and pressure monitoring. In this guide, we show you how to install the sensor, flash the ESP32, configure MQTT, and view the readings…
A simple example of sending multiple integers from one board to another The I2C (Inter-Integrated Circuit) bus allows two wires—SDA and SCL—to connect multiple devices.Each device can act as a master, slave, or both. In most projects, one board sends…
I2C is one of the simplest ways to connect multiple sensors and peripherals to your ESP32 using only two wires (SDA and SCL). When debugging a new project, the first thing you should do is scan the I2C bus and…
Send Sensor Data With Zero Assumptions • Exact Steps • Fully Reliable This guide shows exactly how to send readings (e.g., BME280 temperature/humidity/pressure) from your ESP32 to Home Assistant using MQTT. Everything is simple, direct, and tested. 1. What You…
Everything you need, zero assumptions, no missing steps This guide gets you from new board → first working program in the simplest and shortest way possible. 1. What You Need Use these items: No breadboard or extra parts needed for…