The Raspberry Pi Pico W is the cheapest way to add sensors to Home Assistant

This article explains how the Raspberry Pi Pico W can be used to add sensors to Home Assistant at a low cost. It highlights the benefits of using the Pico W for custom sensors, including its affordability, ease of use, and compatibility with Home Assistant. The article also provides a practical setup flow for getting started with the Pico W, including flashing MicroPython, connecting to Wi-Fi, and publishing test values to an MQTT broker. Additionally, it discusses the tradeoffs and considerations when using the Pico W for sensor projects, such as Wi-Fi stability, power supply, and defensive coding.