Despite the aggression and full-scale war being waged against our country, we remain fully operational and continue to fulfill orders for our clients worldwide.

Top order destinations

• USA (10–14 days in 98% of cases);
• Germany (10–14 days in 96% of cases);
• France (10–14 days in 99% of cases);
• UK (10–14 days in 98% of cases);
• Austria (10–14 days in 99% of cases);
• Switzerland (10–14 days in 97% of cases);
• Romania (10–14 days in 99% of cases);
• Belgium (10–14 days in 97% of cases);
• Australia (10–14 days in 60% of cases).

Order processing and fulfillment

4–7 days (some shop orders may take longer to process due to the manufacturing required for certain items included in the ordered product specifications).

Shipping & dispatch

Once or twice a week, except Sundays and Mondays.

Shipping carrier

Ukrposhta for local and international orders. Nova Poshta is also available as an option for local orders within Ukraine. Delivery is available to all destinations (except for temporarily occupied territories of Ukraine and countries that are subject to international sanctions or hostile toward Ukraine and its citizens).

Order tracking

All orders are shipped with tracking.

Shipment delivery system

International orders are shipped within the PRIME international delivery system. The PRIME international delivery system (an initiative of the TSC — Telematics and Standards Cooperative within the Universal Postal Union) currently unites more than 40 leading postal operators worldwide.

Parcel delivery terms

DAP (Delivered at Place) for orders via the website, and DDP (Delivered Duty Paid) for orders via our Etsy shop (where supported by Etsy in each specific case).

Testing and tuning

All products undergo thorough testing and configuration (where applicable) before shipping.

Shop now

Unfortunately, we are still in the process of relocating our business operations to the US in order to restore our sales on Tindie.

Tindie is a fantastic platform for DIY, and most importantly, it has an amazing community of users and valued customers. We would love to continue our work there, but various circumstances are currently keeping us from resolving this setup.

But challenges exist to be solved. Back in 2023, we launched our Etsy shop, and our own website’s online store has been up and running since 2021. We welcome everyone interested to place their orders directly on our website or via Etsy. Both platforms handle both domestic orders within Ukraine and international shipping, with the exception of countries currently under international sanctions.

If it makes no difference to you, we would highly appreciate it if you placed your orders directly through our website:
https://iot-devices.com.ua/shop

Our website’s store offers the widest selection of products, whereas marketplaces like Etsy only feature a limited part of our inventory.

However, if you have good reasons that make ordering through Etsy more convenient for you, please feel free to do so there:
https://iotdevicesllc.etsy.com

Here is a quick comparison:

Tindie Store (if it were currently active)

Payment: PayPal
Buyer taxes and duties collection: No
Shipping location: Ukraine
Order tracking: Yes
Warranty: Tindie Guarantee

Our Website Store

Payment: Credit/Debit Card
Buyer taxes and duties collection: No
Shipping location: Ukraine
Order tracking: Yes
Warranty: IoT-devices LLC Replacement and Return Policy

Etsy Store

Payment: PayPal, Credit/Debit Card
Buyer taxes and duties collection: Yes
Shipping location: Ukraine
Order tracking: Yes
Warranty: Etsy’s Purchase Protection program

Let’s answer some related questions

Q. If I am outside of Ukraine, can I still order products directly from your website?

A. Yes, absolutely. Our website fully supports international orders. The only exceptions are countries currently under international sanctions and certain other nations that are hostile toward Ukraine and/or support terrorism.

Q. If I am in Ukraine, can I order through Etsy? If so, how will the product be shipped?

A. Yes, if ordering on Etsy is more convenient for you—for instance, if you prefer using PayPal as your payment method. In this case, the item will be shipped from Ukraine to Ukraine via Ukrposhta.

Q. If I order directly from your website, will it help me avoid the extra fees or taxes I would have to pay when ordering on Etsy?

A. If you place an order on our website, we will cover all the necessary taxes here in Ukraine. However, when the package clears customs at your destination, you will still be responsible for paying any applicable local import duties and fees.
Since we are not a US or EU registered business, we cannot act as a tax agent or withhold any taxes or duties on behalf of foreign governments, as Etsy does in certain cases. Therefore, by ordering directly from our website, you assume full responsibility for any additional fees or import charges that may arise.

Q. What payment methods are supported on your website?

A. For all orders, whether local or international, we support only one payment method: credit or debit card. If you are looking for more payment options, we recommend using our Etsy shop instead.

Q. Under what shipping terms are your packages delivered? Is it DDP?

A. In the case of ordering through Etsy, yes—it is as close to DDP (Delivered Duty Paid) as it gets, since Etsy automatically collects all taxes and fees from the buyer during checkout and payment. In theory, such packages should clear customs faster, although in practice we do not see a significant difference in delivery times. Please also note that Etsy states that, in most cases, our packages are covered by Etsy’s Purchase Protection program.

A. (Continued) When ordering directly through our website, the terms are DAP (Delivered at Place) rather than DDP. For all shipments (including our Etsy shop orders), we always utilize the international PRIME system (see: https://www.ipc.be/services/quality/prime).
Our postal operator, Ukrposhta, is a member of the Universal Postal Union. If we look for the closest equivalent in Incoterms, a package sent via PRIME is delivered under DAP rules. This means that we cover the shipping costs up to the specified address when dispatching the package. The recipient, however, is responsible for all customs duties and taxes, such as VAT, and in some countries, Sales Tax (for example, local state fees in the US).
A. (Continued) The only exception is the additional 10% customs fee introduced in the US in 2025—the cost of this fee is already included in our shipping price.

Q. Is the fulfillment warehouse for orders placed on Etsy different from the one used for orders placed on your website?

A. No, it is the exact same warehouse in Ukraine. All packages are shipped through Ukrposhta, Ukraine’s national postal operator.

Q. Do you have a warehouse in the US or the EU?

A. No. Our manufacturing and fulfillment facilities are located entirely in Ukraine.

Q. Why are the prices on your website listed in Ukrainian Hryvnia (UAH)? Can I pay in my own local currency?

A. As a business registered in Ukraine, we are legally required to conduct all transactions exclusively in Ukrainian Hryvnia (UAH). To help our shop visitors easily estimate the cost of our products, we provide an option to switch the displayed currency to USD, but the actual payment will still be processed in UAH. During checkout, the payment gateway will automatically convert the funds from your card’s currency based on the exchange rates of the International Payment Systems.

Q. Does the final price when paying for an order through the website differ from the total shown at checkout? Why is this so?

A. Since we can only accept payments in Ukrainian Hryvnia (UAH), the payment gateway we use will convert your card account’s currency into UAH, and a standard transaction fee from the international payment systems will also be applied.

Q. When placing an order through your website and completing the payment, will I need to share my payment details, such as my card number, with you? How secure is your payment system?

A. Our website stores only the bare minimum of necessary information, such as your email and shipping address details. No payment data is ever processed or stored on our servers. The entire checkout and payment procedure takes place on the secure infrastructure of our third-party payment provider, fully complying with the security standards required by International Payment Systems.

Q. I tried to pay with a card on your website, but the payment failed with a comment saying the bank did not authorize the transaction. What is the issue, and what should I do?

A. Most likely, it is your own bank that blocked the transaction due to its internal security policies. If this happens, we recommend contacting the customer support of the bank that issued your payment card for assistance. Alternatively, you can try completing the payment using a different card.

Features:

• Breadboard view: realistic image of the module.
• Schematic view: clear and standard symbol for easy circuit design.
• PCB view: accurately placed copper pads with a correct pitch of 2.54 mm (0.1″) and a silk screen mask.
• Complete metadata: correct family, manufacturer, and pin designations.

Installation:

• Download the latest version of the .fzpz file.
• Open Fritzing.
• Go to the File > Open menu and select the downloaded .fzpz file.
• The GGreg20_V3 module will appear in your My Parts basket.

We at IoT-devices plan to use this part ourselves to create materials for our publications. We hope that your DIY radiation measurement projects will become even better. The part file is available on GitHub and on the Fritzing forum, in the branch dedicated to the development of new components.

As a next step, we plan to submit the part we have developed for consideration for inclusion in the official Fritzing component database. Follow our posts.

Links:
GGreg20_V3 module description on the website;
GGreg20_V3 component on GitHub;
GGreg20_V3 on Etsy;
GGreg20_V3 companion app on Google Play.

About Norton Safe Web:

https://safeweb.norton.com/help/about

Related links:

• Publications: https://iot-devices.com.ua/en/blog/
• Online store (for international orders and orders from Ukraine): https://iot-devices.com.ua/en/shop-2/
• Profile on Trustpilot: https://go.iot-devices.com.ua/trustpilot
• Store and reviews on Etsy: https://iotdevicesllc.etsy.com

Although our contribution to ESPHome is quite modest, it is nice to know that we are also part of a community of wonderful people and companies who created ESPHome and continue to make it better every day.

You can view the list of contributors here. Or in the Internet Archive via Wayback Machine.

Related Links:

ESPHome Devices

GitHub

For makers who want to purchase the GGreg20_V3 Geiger counter module without a tube (because they already own a compatible tube or plan to source one elsewhere), this small technical note details the dimensions of the tube mounting on our module’s PCB.

As you can imagine, having the option to buy just the module can be very convenient for some. We have always provided this option (on our website, Etsy, and previously on Tindie) — allowing you to select and order only the components you need right now. Over time, we received feedback, gained experience, and discussed this matter with our customers.

Note: The GGreg20_V3 was originally designed for the SBM20 tube, but its Soviet-era stock quickly ran out, so we specifically chose the even better J305 tube as a replacement. This means the standard SBM20 will also fit the module, as it was the tube we originally designed it for.

It turns out that the Chinese market offers J305 tubes with varying dimensions. This is why we want to explain exactly which J305 tube (or similar) will fit the GGreg20_V3.

We provide data for the J305 tube that we currently supply with the GGreg20_V3. We use the data provided to us by our J305 tube supplier from China.

Further on, we include a technical drawing with dimensions and a few photos to clearly illustrate the setup.

We also provide a photo of several J305 tubes from the latest batch, which clearly shows that while J305 tubes have minor size variations, they can be considered identical for our purpose. In several years of working with the J305, we have only encountered two initially defective tubes, as well as one tube that significantly differed in size from the rest of the batch and from the dimensions specified in the datasheet.

We hope this publication will help you understand which tube to choose so that it fits the module, particularly in terms of length.

Good luck!
IoT-devices team

Seamless Integration of Radiation Monitoring

The ggreg20_v3 component is designed for smart home enthusiasts and developers who seek to add ionizing radiation monitoring capabilities to their devices.

It provides a comprehensive set of data points essential for complete environmental control, including:

• Radiation Power (μSv/h)
• Equivalent Absorbed Dose (μSv/h)
• Total Accumulated Dose (μSv)
• Counts Per Minute (CPM) over the defined measurement period
• Instantaneous pulse count value
• System Status (alerts for danger, normal levels, or sensor errors)

This component autonomously handles all complex calculations, including dead time correction for the tube, delivering all necessary data for seamless automation within Home Assistant.

Key Advantage: Cross-Controller Compatibility

The core value of the component developed by IoT-devices LLC lies in its versatility. The ggreg20_v3 component is cross-controller compatible, supporting any microcontroller that runs ESPHome (including ESP32, ESP8266, Raspberry Pi Pico W, and others).

This eliminates the need to write individual code for different hardware platforms, allowing users to rapidly integrate radiation monitoring regardless of the specific controller used for their projects.

“We built ggreg20_v3 with the ESPHome community in mind. Our goal is to make environmental monitoring as accessible and reliable as possible by providing a single, flexible solution that works across all supported controllers,” commented IoT-devices LLC representatives.

How to Get Started

The ggreg20_v3 component is available as an external Git component.

To install: Add our repository to your ESPHome configuration and follow our detailed documentation.

• GitHub Repository: [https://github.com/iotdevicesdev/esphome_external_components]
• Documentation: Review the README.md file for full installation and configuration instructions.

IoT-devices LLC welcomes the community to test, provide feedback, and contribute to the component’s development.

The first product, which is already available for order, is a plastic case for the popular Raspberry Pi Pico W microcontroller with straight pin headers.

Just like IoT-devices’ own products, the items under the IoT Case Lab brand are supplied by the company under the same terms and policies, with global shipping available.

Customers from over 40 countries can already place orders on the website’s store. There are also plans to list the ICL-branded products in the IoT-devices LLC store on the Etsy marketplace.

A Product That Solves Problems

ICL products address common issues that DIY developers constantly face. The most popular components are typically connected using Dupont cables, which have a significant flaw: they often have a loose fit, leading to unstable connections and potential project failures.

The engineers at IoT Case Lab took this problem into account and designed a case that not only protects the microcontroller from external damage and short circuits but also securely fastens the Dupont connectors. This ensures a stable connection and makes the device easy to use.

Key Features of the case line:

• Specialized Design: The cases are specifically designed for certain microcontroller models, in this case, the Raspberry Pi Pico W with straight pin headers.
• Secure Connection: Dupont cable connectors are firmly secured by a panel, preventing them from accidentally disconnecting.
• Full Functionality: All pin headers, the BOOTSEL button, the Debug port, and the micro-USB port remain fully accessible.
• Protection and Cooling: The case protects the controller board from mechanical damage, while ventilation holes provide passive cooling.
• Universal Mounting: Thanks to special universal connectors, ICL cases can be joined with each other.

Details and Links

This case can be ordered on the IoT-devices website via the following link:
https://iot-devices.com.ua/en/product/raspberry-pi-pico-w-icl-rpipw-st-v1-plastic-case-straight/

For those who want to get to know the product better, all information is available on GitHub:
https://github.com/IoTCaseLab/ICL_RPIPW_ST_V1-case-for-Raspberry-Pi-Pico-W-with-straight-pin-headers

3D model of the case’s outer contours: https://github.com/IoTCaseLab/ICL_RPIPW_ST_V1-case-for-Raspberry-Pi-Pico-W-with-straight-pin-headers/blob/main/res/RPi-Pico-W-2022-model_straight_mcu2-type2_solidDemoBrick.stl

Our Idea

Over the past few years, we’ve encountered situations where a Geiger counter needed to be used simply and quickly, without specialized knowledge or experience, without connecting additional devices, and without complex communication. Of course, you could just count pulses and time them with a stopwatch. But we thought, why not create a convenient app for this? And we did.

Benefits of Using GGreg20_V3 with This App

• Affordable Solution: No need for a controller like Arduino, ESP8266, ESP32, or Raspberry Pi.
• Ease of Use: No programming skills required.
• Wireless: No need to solder or connect cables.
• Quick Start: No need to search for or pair a new device.
• Broadcasting: If needed, one Geiger counter can be used simultaneously by many users.

Who This App Is For

While this app isn’t precise and, paired with GGreg20_V3, isn’t a finished device, users who can’t or don’t want to program can immediately use the GGreg20_V3 module simply by powering it and installing this app.

But remember, this is only an educational, demonstration, and testing app for beginners. Please choose appropriate tools for appropriate tasks.

This app is also convenient for quickly testing the module’s functionality, for example, when picking it up at the post office.

For Accurate Measurements

If you’re looking for accurate and reliable measurements using the GGreg20_V3 module, we recommend checking out our other companion app for GGreg20_V3, which is about to appear on Google Play. That app uses a controller with Bluetooth as the data transfer channel between the module and the smartphone.

Please note: the BLE app requires significantly more work on the DIY project – at least knowledge of ESPHome, BLE Server, and controllers like ESP32 or Raspberry Pi Pico W, etc.

How It Works

GGreg20_V3 users only need the module powered (according to documentation) and this smartphone app. Wireless data transfer from the GGreg20_V3 module to your smartphone occurs via sound signals from its built-in buzzer. The app filters sounds captured by the smartphone’s microphone, recognizing only those that match the signals from the GGreg20_V3 buzzer.

Known Limitations

Using the wireless audio channel can lead to false readings or inaccuracies in noisy environments.

Specifically:

• Although the GGreg20_V3 Geiger counter can register all pulses that tubes like J305, SBM20, or LND712 are capable of in high-radiation conditions, this app has a significant limitation. To differentiate pulses, an artificial 70-millisecond delay between the pulses the app perceives had to be implemented. This means the app can correctly process radiation levels only up to 850 CPM (or 3 uSv/hour). This is entirely sufficient for normal household conditions but will be insufficient in the event of a nuclear disaster.
• While the app effectively filters events only of a specific frequency, there’s a problem of signal clutter, for instance, from a nearby conversation. In such cases, the signals overlap, and the app ignores relevant pulses.
• We’re also aware of an echo problem with relevant signals. This occurs in enclosed spaces. You can see this effect in the video in the app description on Google Play, where the buzzer pulses once, but the app sometimes counts them twice, likely due to echo. (For shooting this video, we use a lightbox where the echo occurs.)

Important Note

This app, like the GGreg20_V3 module, is not a precise measuring device. It’s intended for personal use, hobbies, learning, and creative experiments, not as a finished product. It’s created for DIY electronics enthusiasts.

Keywords

Geiger counter, GGreg20_V3, Ionizing Radiation, Companion Application, Conversion Factor, Geiger Muller Tube, DIY, IoT, Radiation Measurement, Embedded Electronics, Electronics

Screenshot of the profile on the Registry Operator’s website:

Screenshot of the excerpt in the national standings:

Screenshot of the excerpt in the regional standings: