W-GM Count - IoT (Wifi) for Radioactivity Monitoring

The W-GM Counter based on an ESP32 chipset (Heltec WIFI kit-32 with OLED) is a fork of the Ethernet C-GM Counter and costs (27$/22) about half price of the C-GM Counter.
This D.I.Y low cost radioactivity counter project provides hardware and firmware for building a Geiger-Mller counter device aka G.M. counter for continuous measurement of the radioactivity level. It is uses an ESP-32 with OLED, a booster module inside the 400V power supply, a battery charging circuit and very few components around.
Our design has been drastically optimized to reduce as much as possible to the minimum number of components and enable users to wire the hardware on a piece of Veroboard without requiring specific material.
The W-GM Counter is able to run as a standalone radioactivity counter or for ensuring long term radioactivity monitoring, can be used in association with A-GM Manager (see the Eco-System) that is an open-source web application running on a SOHO server (e.g. QNAP sells Small Office Home Office servers). A-GM Manager is also able to publish the W-GM Counter measures on the worldwide shared map managed by GMC MAP. Finally, there is also a Node-RED version for integration of the W-GM Counter with Node-RED such as the QNAP IoT framework.
NOTE: The W-GM Count uses fragile components that can be easily destroyed and makes it assembly a little more complex. You have been warned! During the development, I had one ESP8622 destroyed while powered by a DC pack on USB and one Heltec ESP-32 Wifi Kit-32 out-of-order due to 3V3 failures with no clear reason. This will drastically increase the final cost of the DIY device. I cannot be blame for this.IMPORTANT (risk of electrical shocks)
The device requires a 400 Volts power supply. Despite the current delivered will remain very low, I discourage people not accustomed dealing with electronics and electricity to try building this device but to choose a commercial product instead (see available compatible products in the Eco-system section).”