GGreg20_V3 Ionizing Radiation Detector

Find the exact mounting dimensions for J305 and SBM20 tubes on the GGreg20_V3 Geiger counter module. Ensure perfect compatibility for your DIY projects. Feel free to choose to buy the module with or without the tube.

Read the full article: 

https://iot-devices.com.ua/en/ggreg20-v3-j305-tube-mounting-dimensions/

October 3, 2025, Kyiv — IoT-devices LLC is pleased to announce the official release of the new external component, ggreg20_v3, for the ESPHome smart home platform. This component significantly simplifies…

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https://iot-devices.com.ua/en/ggreg20_v3-external-component-for-esphome/

This Sound GGreg20_V3 App companion (hereinafter referred to as the App) for the DIY Geiger counter module GGreg20_V3 was developed by the IoT-devices team to provide a quick and convenient way to get started.

Read more:

https://iot-devices.com.ua/en/meet-the-sound-ggreg20_v3-app-for-android-on-google-play/

Here's an example for the GGreg20_V3, sending radiation levels right to your smartphone app using BLE (Bluetooth Low Energy)! This part dives into the first piece of the project: setting up the ESP32 as a BLE Server with the GGreg20_V3 as a sensor.

Read more:

https://iot-devices.com.ua/en/ggreg20-v3-ble-enabled-geiger-counter-esp32-esphome-part1/

The new GGreg20_V3 board is supplied in black color. This is probably already the tenth generation, which received an updated circuit for smoother high voltage regulation and limitation of its values. The module also received two stickers: Q.C. and VOID. Read about all this in this article.

Read more:

https://iot-devices.com.ua/en/new-black-ggreg20_v3-board-hv-adjustment-upgrade-and-stickers/

We analyzed the 2024 order statistics in the online store on our website and added order statistics in the Etsy marketplace store to determine which versions of the Geiger counter module GGreg20_V3 are ordered most often.

Read more:

https://iot-devices.com.ua/en/most-frequently-ordered-ggreg20_v3-options-2024/

Our company has conducted a thorough testing of the power consumption of the Geiger counter module GGreg20_V3, intended for use in DIY projects. The purpose of the study was to determine the real power consumption of the module at different supply voltages: 3.3V, 3.7V, 5.0V.

Read the full technical note:

https://iot-devices.com.ua/en/ggreg20_v3-geiger-counter-energy-consumption-testing/

At the end of December 2024, our user from Germany found that the pulse counter (pulse_counter component) in the example YAML code for ESPHome firmware with the ESP32 controller stopped working. Thank you, Kedalux, for paying attention to this and participating in the localization of the problem.

Read the full article at:

https://iot-devices.com.ua/en/esphome-esp32-ggreg20_v3-firmware-pulse-counter-issue-solution/

Technical note on manual initial diagnostics of the GGreg20_V3 module with J305 tube to check the main module voltages at the control points and determine the module's operability

Read the full article:

https://iot-devices.com.ua/en/technical-note-on-initial-diagnostics-of-ggreg20-v3/

CD gave @IoT-devices, LLC, 5 stars on #GGreg20_V3 Ionizing Radiation Detector via Trustpilot

See the review at: https://trstp.lt/UbGwiXCh5