The Raspberry Pi Pico W is being used to create a wireless radiation monitor, with a Geiger counter module being added to the small SBC to detect and measure radiation levels. Created by Redditor ‘Sboger’, the project is a neat example of how the Pico W can be used to create internet of things (IoT) devices.
The project uses a GGreg20_V3 Geiger counter module to detect radiation, with calibration figures being used to determine a baseline for background radiation. By comparing current radiation levels to the baseline, the Pico W can identify when radiation levels are higher than normal.
The project is a neat example of the flexibility of the Raspberry Pi Pico W, with the wireless technology offered by the SBC being used to transmit data and manage it remotely, rather than having to hook up a display to it.
The hardware setup includes the Geiger counter, Pico W, and an ESP32 module running ESPHome, which is a Home Assistant application that can be used to manage the data wirelessly transmitted by the Pico W.
Sboger shares details about the code used in the project, including links to the ESPHome Home Assistant GitHub page for integrating the Geiger counter module. They also provide steps for adapting the Geiger counter with an Arduino, although this does require some modification for use with the Pico W.
The original thread on Reddit provides a comprehensive breakdown of how the project works. Make sure to follow Sboger for future updates on the project.

Raspberry Pi Pico W + Geiger counter = WiFi radiation monitor (with ESPHome) Sboger April 11, 2023 @Sboger #RPi #GeigerCounter #WiFi #ESP #IoT #InternetOfThings #Makers #DIY #Security #Hacking #Hackers #Hacker #Gadgets #SmartHome #Tech #Technology
Original story here – Downsizing the Geiger Counter to Make a Raspberry Pi WiFi Radiation Sensor
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